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Question
14 2B Precision engine bearing inserts are manufactured with a small
portion of the bearing ends extending beyond the bearing
housing or caps. The installation process of these bearings
requires sufficient ________.
14 3B Where is a fusible plug installed on a Scotch or auxiliary boiler?

14 4A Bearing wear on a split sleeve type bearing is measured with a

____________.
14 5C The amount of wear on a split precision main bearing can be
accurately determined by comparing the data from a previous
reading to the present readings taken with a ____________.
14 6C The amount of wear on a split, fixed sleeve-type, main diesel
bearing can be accurately determined with a ________.
14 7A The RPM of "A" is 100 and hobbed with 76 teeth. If gears "B",
"C", and "D" have 60, 32, and 42 teeth respectively, the RPM of
"D" in the gear train illustration is __________.
14 8A Crank web deflection readings will give a positive indication of
____________.
14 9C When a diesel engine is equipped with a hydraulic starting system
designed to operate at pressures of 150 psi or more, Coast Guard
Regulations (46 CFR) require that the hydraulic fluid shall
14 10 C After an engine has been started using a Bendix drive unit, the
drive gear, or pinion disengages from the flywheel due to
14 11 A What preventative maintenance should be done frequently to
diesel engine starting air receivers?

14 12 D Coast Guard Regulations (46 CFR) permit drain valves in the

machinery space for removing water and impurities from diesel
engine fuel systems. Those valves m____________.
14 13 B According to the diagram shown in the illustration, the lube oil
system can best be described as a ____________.
14 14 D The RPM of "D" is 600 and hobbed with 48 teeth. If gears "A",
"B", and "C" have 84, 66, and 22 teeth respectively, the RPM of
"A" in the gear train illustration is __________.
14 15 C Where diesel engine speed and clutch controls are combined into
one operation by a single control lever, movement of the lever
from the "stop" position to the "ahead" position will FIRST

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14 16 D In comparison to exhaust valves, intake valves of diesel engines
may be fabricated from low-alloy steels because
_____________.

14 17 B Fusible plugs are installed in fire-tube boilers to

_____________.
14 18 B Friction developing between the moving parts of a governor,
governor linkage and control valve will cause the governor to
_________.
14 19 B The governor, shown in the illustration, will have its preset speed
droop altered whenever ____________.
14 20 A The governor shown in the illustration can produce shutdown of
the engine by ____________.
14 21 C Which of the bearings listed are most widely used for the main
and connecting rod bearings of a diesel engine?
14 22 D Coast Guard Regulations (46 CFR) permit the use of drain valves
for removing water or impurities from diesel engine fuel systems.
These valves must be ____________.
14 23 B Which of the following methods is normally used to lubricate
bearings in a small high-speed diesel engine?
14 24 A The auxiliary boiler feedwater level control shown in the
illustration, utilizes ________.
14 25 C A loose crosshead plunger assembly in a metering or
proportioning pump will cause _____________.
14 26 A The parts labeled "I and II", shown in the illustration are properly
called the _____________.
14 27 A As the load is being decreased on the engine controlled by the
governor shown in the illustration, the ____________.

14 28 B A large change in ambient temperature, or using an oil of a

viscosity different than the one recommended by the
manufacturer in a mechanical hydraulic governor, will result in the
need to adjust the ____________.
14 29 C Changing the position of the fulcrum in the compensating system
of the governor shown in the illustra___________.

14 30 A To check the setting of the overspeed trip on a diesel powered

generator, you would use a _____________.
14 31 A Which of the following is an example of a solid bearing?

14 32 A Coast Guard Regulations (46 CFR) require steel tubing

connections and fittings used with diesel fuel oil systems, to be
either flared or _____________.
14 33 B In an auxiliary diesel engine bypass type lubricating oil system,
the main lube oil pump forces _____________.
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14 34 C The pneumatic circuit shown in the ilThe engine will continue
control circuit for a large low speed to operate; however,
operation of the engine be affected i restarting of the engine
check valve to the servo motor is se will be difficult.

14 35 C The pneumatic circuit shown in the ilThe circuit shown is used

large low speed engine control syst to shift the cam shaft
statements describes the function of tposition when reversing
the engine.

14 36 B In a naturally aspirated diesel enginecompression ratio

directly related to engine ________________.
14 37 D Which of the following statements deThe wye arrangement
unit shown in the illustration as f provides variable
diesel engines? positioning of the intake
port dampers.

14 38 C In a bypass type filtering system fo returns directly to the

diesel engine, the lube oil bypassing suction side of the pump

14 39 D Two important considerations for thecetane number

engine include, the delivery of the oil in sufficient amount, and the
14 40 D Friction, engine wear, and oil consumacidity of the oil
directly related to the ____________.
14 41 D In a diesel engine, the main bearing connecting rod and the
_____________. crankshaft
14 42 D The replacement piping for diesel enavoid unnecessary parts
systems must be the same length andinventory
piping to _____________.
14 43 D Heat exchangers are most commonlyfuel oil system
diesel engine ____________.
14 44 C The pneumatic, shut down circuit show
One signal is derived
of a complex, large, low speed, engi from the manually
may be activated by three different soperated valve "D", while
following statements describes the pothe other two are
generated by the main
lube oil and cylinder
lubrication systems.
 14 45 C Diesel engine jacket water is used incoolant for the distillate
the ____________.
within the distiller

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14 46 B Multiple concentric valve springs are often used with diesel
engine valves to ____________.

14 47 B The RPM of "D" is 600 and hobbed with 46 teeth. If gears "A",
"B", and "C" have 94, 80, and 30 teeth respectively, the RPM of
"A" in the gear train illustration is __________.
14 48 C A controllable pitch propeller on a diesel driven vessel eliminates
the need for ____________.
14 49 A When the prime movers of two paralleled generators are
equipped with mechanical-hydraulic governors, and are
operating within their designed range, the unit with the least
amount of speed droop will ____________.
14 50 C The function of the device shown in the illustration is used to
________.
14 51 C Which of the listed bearing installations is subjected to swinging
motion?
14 52 B To prevent vibration damage to the fuel supply line of a diesel
engine, you may use ____________.
14 53 C One advantage of vacuum feed type cylinder lubricators over the
liquid sight glass type is ______________.
14 54 A Cooling water pumps driven by direct reversing diesel engines
are usually of the straight impeller vane type pump with a
concentric housing to ____________.

14 55 D The diesel engine component labeled "5", shown in the

illustration is known as the _____________.
14 56 A If the combustion control system of an automatically fired auxiliary
boiler fails to sustain burner ignition after a normal shutdown, you
should check for a/an __________.
14 57 B Concerning the diesel engine shown in the illustration, which of
the following represents the number of crank angle degrees of
rotation existing between each firing(See illustration MO-
0038.)
14 58 B In the overrunning clutch shown in the illustration, if "A" were
 traveling faster than "B", the clutch is considered to be
14 59 D Regarding the overrunning clutch shown in the illustration, you
would expect ____________.

14 60 B The term "PLAN/33,000" is equal to the _____________.

14 61 A Bearing "crush" as applied to diesel engine main bearings, will
result in _____________.

14 62 D Which of the listed types of gasket material should be used on

high pressure fuel oil lines on a diesel engine?

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14 63 B Motor vessels usually have independent lube oil systems for main
engine and main reduction gears because ______________.

14 64 A In the engine shown in the illustration, the part labeled "W" is

cooled by _____________.
14 66 A Clearance volume scavenging in a turbocharged, four-
stroke/cycle diesel engine is accomplished ___________.
14 67 C Mist detectors used on large low-speed main propulsion diesel
engines monitor and check for the presence of ____________.
14 68 D Which of the following is the required operating medium for the
reversing mechanism shown in the illustration?
14 69 A The diesel engine wrist pin in the illustration is indicated by the
component labeled ___________.
14 70 A How may water be removed from the bowl of the separator as
shown in the illustration?

14 71 C A main propulsion diesel engine crankshaft bearing lacking

sufficient "crush", will _____________.

14 72 C In the slow speed diesel engine shown in the illustration, the part
labeled "E" is the ________________.
14 73 C The part labeled "X" shown in the ill____________.

14 74 B The diesel engine shown in the illustration, which of the lettered

parts listed is cooled by sea water?
14 75 D Which of the bearings listed is most widely used for main and
 connecting rod bearings of modern diesel engines?
14 76 B Directional intake ports in diesel engines are used to
_____________.
14 77 C Before any work is to be carried out on a burner in an
automatically fired auxiliary boiler, you should always
14 78 D Generating tubes in waste heat boilers are finned to
____________.
14 79 B If an operating auxiliary boiler has a water pH reading of 7, you
should ______________.

14 80 A Which of the following conditions is responsible for the fuel oil to

atomize when using a steam atomizer in an auxiliary boiler?
14 81 B Diesel engine main and connecting rod precision bearings are
made in halves. Each half exceeds one-half the bearing
circumference by a small amount. The small amount is termed

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14 82 D Fuel is admitted to a diesel engine cylinder through the
14 83 C The piston rod scraper box incorporated in a two-stroke/cycle,
crosshead diesel engine serves to _____________.

14 84 A The large, slow-speed, main propulsion diesel engine shown in

the illustration, the part labeled "B" _____________.
14 85 C The fitting labeled "A" for the device shown in the illustration is
used to connect the reversing cylinder to the _______________.
14 86 B The diesel engine connecting rods shown in the illustration are
distinctively named __________.
14 87 B What activates the water drain valve (V5) of the separator as
shown in the illustration?

14 88 A A failure to any component of a flame safeguard control for an

automatically fired auxiliary boiler, w
______________.
14 89 A When an auxiliary boiler is on the line, the output of the flame
scanner can be checked by placing a microammeter in series with
the photoelectric cell circuit. The readings on high fire should be
14 90 B A feed pump for an auxiliary boiler might lose suction if the
____________.
14 91 B The proper location for journal bearing oil grooves is
 _______________.
14 92 B The unit shown in the illustration is called a/an _________.

14 93 D How are hydraulic valve lash adjusters on diesel engine rocker

arm assemblies lubricated?
14 94 B Trunk-type diesel engine pistons are most effectively cooled by
heat _____________.
14 95 D The amount of oil consumed by a return flow-type fuel
atomization system, fitted with both supply and return meters,
can be determined by the ____________.
14 96 A Which letter represents the scavenging air system nonreturn
valve in the illustration?
14 97 B Which of the following methods is used with a varying load on an
auxiliary boiler equipped with the burner assembly shown in the
illustration?

14 98 C Main propulsion diesel engines having a bore exceeding 300 mm

are to have at least _________.

angle

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14 99 B The water in a steaming auxiliary boidissolved oxygen
14 100 C A portion the pneumatic control circuThe engine would stop
diesel engine is shown in the illustr abruptly due to the loss
the following conditions would occurof pressure at shut down
"B" and "D" were to be severed? servo motor.

14 101 A The programmed control system of an

the damper is not
will terminate the light off process dsufficiently open
air flow is not sensed and _________.
14 102 C The fuel injector shown in the illust part #33
pressure acting upward on ____________.
14 103 C Integral water jacket liners use O-ri form a water seal
liner. These O-rings serve to _____ between the liner and
engine block

14 104 C Telescopic pipes to the piston of a excessive crankcase

propulsion diesel engine are design pressure
14 105 B Reduction gear lube oil temperatureslower than raw water
are generally ___________. cooled installations
 14 107 D The cylinder labeled "B", in the illustoil used to lubricate
_______. component "F"

14 108 C Fork and blade type diesel engine c "R" and "10"
the illustration. Which letter combinations represent these
components?
14 109 A Microbiological growths in marine fextremely detrimental to
that can be ________. equipment and operating
processes
14 110 D The flame safeguard control system owater
boiler will provide fuel shut off in the case of high ____________.
14 111 A A characteristic of a bearing materiadesirable, as it will
particles to become embedded in it's prevent damage to the
________________. journal surface
14 112 D Fuel oil begins injection into the cyl intake stroke
diesel engine during the _____________.
14 113 C Lube oil pumps taking suction from of the diaphragm type
marine engines are usually _____________.
14 114 C A large, low-speed, main propulsion cylinder heads
water to directly cool the _____________.

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14 115 D The 7 bar control air supply shown inThe pressure switch,
Which of the following statements relabeled as "C", will
action that will occur? energize the automatic
shutdown circuitry,
preventing any additional
operating casualty.

14 116 B In the diesel engine shown in the illucool the scavenge air
part labeled "P" is to _____________.
14 117 D The total starting air capacity requi six consecutive starts
is to be sufficient for a least __________.
14 118 C Which of the following statements rePlace the engine in the
procedure for checking the oil levelsahead direction, add oil
labeled "B" and "C" shown in the ill in the ahead cylinder
until 3/4 full and repeat
for the astern cylinder.

14 119 D What is the function of component "1The inlet jumper directs

 cooling water to the
cylinder liner.

14 120 B The light and medium fuels utilized lubrication for pistons
provide a source of ________. and rings

14 121 B The submerged electrode low water touches the bottom of

automatically fired auxiliary boilers,the electrode
supply if the boiler water level ____________.
14 122 A Most fuel injection nozzles are op fuel oil pressure

14 123 D The lube oil pump used in a diesel volute pump

14 124 B The boiler water alkalinity in a coil- precipitate silica from
maintained at the pH recommended bsolution
14 125 A Coast Guard Regulations (46 CFR) re
fuel oil shutoff due to
automatically fired auxiliary boilers,flameout
indicators to signal __________.
14 126 B The device shown in the illustration three-way spring valve

14 127 B When a waste heat boiler is installedat high loads to prevent

propulsion diesel engine, the exhausoverheating
14 128 D How is the concentration of dissolveFeedwater is cycled
an auxiliary boiler maintained at accthrough a DC heater.

temperature.

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14 129 D Fuels as produced in a refinery are gstored at the refinery
contamination can occur as fuels are ________.
14 130 D Which of the listed types of control Flame safeguard control
Guard Regulations (46 CFR) for large
system
heating equipment?
14 131 C Which bearing half will receive the gLower half of the
stroke/cycle diesel engine? connecting rod bearing
at the crankshaft end of
the rod.
14 132 D Injection pressure in a common rail fengine speed
_____________.
14 133 D Maximum lube system operating press
orifice in the pump
normally regulated by a/an _______ suction
14 134 A Which of the following items is neces
Control of evaporation
installations, regardless of design or manufacturer?
 14 135 D What effect will the engaged jackingThe circuit will prevent
of the pneumatic circuit shown in thethe engagement and
operation of the jacking
gear.

14 136 A A naturally aspirated diesel engine atslightly less than

intake manifold pressure _________atmospheric pressure

14 137 D When it becomes necessary to replace

stress relieved to ensure
tube auxiliary boiler to eliminate leakexpansion when rolled
replacement tubes should be ____________.
14 138 D What is the function of component "G
The blocking controller
assists in maintaining the
reversing control in its
end positions.

14 139 A Item "17" in the illustration is the In most situations this

of the dipstick be changed? would never be done.

14 140 C In order for microbiological growthshigh

t temperatures to
necessary for ________. exist
14 141 A Which of the statements represents aIt turns with the shaft and
collar in a Kingsbury thrust bearing?the pivot shoes do not
rotate.
14 142 A During the fuel injection period, fu ensure penetration and
cylinder gas pressure to _________ distribution of the fuel in
the combustion chamber

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14 143 A The output pressure of a diesel engine lube oil pump is regulated
by a/an _____________.
14 144 C Automatic combustion control systems for some auxiliary boilers
are designed to cycle burners on in response to ____________.
14 145 C The overspeeding of the diesel engine driving an electric
generator could cause ______________.
14 146 C An increase in the air inlet manifold pressure of a diesel engine
will result in a/an ____________.
 14 147 B It is desirable for an auxiliary boiler safety valve to pop open and
reseat quickly to __________.

14 148 C Coast Guard Regulation (46 CFR) requires that after undergoing
extensive repairs, an auxiliary boiler, with a maximum allowable
working pressure of 60 psig (411.89 kPa), should be
hydrostatically tested at a pressure o______________.
14 149 B The purpose of the programmed purge cycle on an
automatically fired auxiliary boiler is to _______________.

14 150 D An auxiliary boiler equipped with a return flow fuel atomization

system, has a _____________.
14 151 C The leveling plates in a Kingsbury thrust bearing are held in
position by _____________.
14 152 A For a continuous operation diesel engine, a duplex filter unit
would be the best arrangement because _____________.

14 153 C Which of the following devices controls the discharge flow rate of
an attached, positive displacement, rotary gear, diesel engine,
lube oil pump?
14 154 D The expansion tank for a diesel engine closed cooling system is
designed to maintain a constant head on the system and
___________.
14 155 D The line "bb" shown in the illustration represents the signal from
the throttle. Which of the following statements describes how the
output of device "A" is able to transform the signal?

14 156 B From the engine data given in the illustration, what is the full load
air manifold pressure?

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14 157 C Which of the following statements deThe linearly measured
reversing unit shown in the illustrati movement of the
camshaft is equal to the
movement of the control
piston.
 14 158 C Line "P" in the illustration is the _ exponential line

14 159 D Why are heavy fuels not usually proHeavy fuels are
microbiological infection? subjected to better
refining processes which
prevent the formation of
these growths.

14 160 D Heavy soot accumulations in an auxilwater in the fuel oil

by _____________.
14 161 B The bearing shown in the illustrationleft to right only
when applied ___________.

14 162 D To minimize corrosion, fuel oil strai brass

blades are made of _____________.
14 163 D In a diesel engine, maximum lube oilthe capacity of the lube
controlled by _____________. oil pump
14 164 D Which of the following statements deMaintains a constant
expansion tank in a diesel engine co head on the system.

14 165 A Prior to lighting off a cold automaticcheck and regulate the

should _____________. water level

14 166 A Within the cycle of a forced circulat collected in the lower

boiler, part of the water flashes int portion of the steam
water is _________________. accumulator for
recirculation back to the
heating coil or water tank
14 167 A Ignition failure in an automatically ccarbon deposits on the
be caused by _____________. flame scanner
14 168 A Device "27" shown in the illustratio seal the shell when
raising vacuum
14 169 A In a coil-type auxiliary water-tube ciunevaporated feedwater
_____________. collects in the bottom of
the flash chamber
14 170 B One method of constructing large macasting interlocking
reducing the total engine frame weigcomponents

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14 171 B On a large diesel engine installation piston rod guides
is maintained by the ______________.
 14 172 A Regarding the fuel injector shown infilter the fuel
of piece No. 38 is to _____________.

14 173 C Which of the following statements isThe oil temperature is

cooler? less than the cooling
water temperature.
14 174 A The device allowing for the change fresh water expansion
in a propulsion diesel engine closed tank
14 175 C The pneumatic circuit shown in the ill
bridge tachometer
system used with large low speed dievariations
arrangement may be used to control _________.
14 176 A Scavenging in a four-stroke/cycle di last part of the exhaust
_____________. stroke, and the first part
of the intake stroke
14 177 C Which of the following conditions Operation of vessel in
reason for the diesel engine to operatshallow water
letter "B" shown in the illustration?
14 178 D A dirty atomizer sprayer plate in the carbon on the register
would be indicated by ___________doors
14 179 A The color of the exhaust from a dies clear
14 180 B Which of the following actions takesA temperature sensing
an automatically fired auxiliary boi device opens the circuit
pressure is obtained? breaker in the burner
motor.
14 181 D In a large, slow-speed, main propulsBed plate
the parts listed is under tension when the engine is running?
14 182 A Coast Guard Regulations regarding di
permitted, provided they
for removing water or impurities ar are fitted with caps or
plugs
14 183 A The lube oil cooler is located after ththe filter to operate more
_____________. efficiently
14 184 D The highest pressure in any closed djacket water outlet
cooling system is at the _____________.
14 185 D What is the primary purpose of the The valve with finite
in the illustration? positioning is used to
segregate terminal
signals originated by the
governor whenever the
throttle is repositioned.

14 186 B Air scavenging of the cylinder shown2 and 3

between figures ________.

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14 187 C The diagram shown in the illustration may be used to determine
the proper operation of the engine. Which of the following
statements represents an accurate interpretation of the diagram?

14 188 B Concerning diesel propelled vessels, the astern power is to

provide for continuous operation astern ___________.

14 189 A Throttling a burner air register on an auxiliary boiler could result

in ____________.
14 190 D A burner producing black smoke in an automatic auxiliary boiler,
would be caused by a/an ______________.
14 191 B In the large, slow-speed diesel engine frame shown in the
illustration, firing forces are absorbed by the ___________,
14 192 A The main advantage of unit injectors over other fuel injection
systems is _____________.

14 193 D Which action should be taken when an auxiliary boiler in is

operation?
14 194 A Failure of the burner flame in an automatic auxiliary boiler would
probably be a result of ______________.
14 195 B If the flame of an automatically fired auxiliary boiler tends to
move away from the burner tip when the firing rate is changed
from low to high, you should ____________.
14 196 B In a two-stroke/cycle diesel engine, the process of scavenging
begins as the ________.
14 197 D Which of the following procedures decreases the total dissolved
solids concentration in the water of an auxiliary boiler?
14 198 B If the fire goes out in an automatically fired auxiliary boiler and the
burner continues to supply fuel, there is a potential danger of
14 199 D Improper maintenance of an automatic auxiliary boiler oil burner
could result in ______________.
14 200 C The bearings used to support the crankshaft are generally called
14 201 B In the diesel engine illustrated, what part is under compression
when firing is taking place in a particular cylinder?
14 202 B Which of the fuel systems listed combines the injection pump and
the injection nozzle in one housing?
14 203 D With respect to the flow of lubricating oil through a diesel engine,
the lube oil coolers are located after filters in order to
14 204 D In any diesel engine closed freshwater cooling system, the lowest
pressure exists at the _____________.

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14 205 C The vessel is propelled by a large, l The circuit breakers for
it is discovered during the starting p the starting air
insufficient amount of air pressure compressors have been
controls. Which of the following sta opened.
probable cause for this condition?

14 206 C Maintaining the lowest possible scavair charge density

times is not recommended due to thebecoming too high
14 207 D Which of the following conditions wiFouled hull
in area "A" of the diagram shown in the illustration?
14 208 C The nuts of main bearings, connecting
hardened steel nut locks
moving parts are to be secured by ________.

14 209 D Most type(s) of microbiological gro bacteria

14 210 D In accordance with Coast Guard Regby simulation only to
level controls utilized in a small aut prevent possible boiler
heating boiler, shall be tested ____ damage due to a low
water condition
14 211 A After a normal, or safety shutdown, furnace to be repurged
systems for an auxiliary boiler are designed to prevent the
immediate refiring of a burner in order for the
14 212 C In a unit injector, an upper helix an facilitating plunger
the lower part of the plunger for _ rotation
14 213 D Passages are drilled in the crankshaftmain bearings
provide lubricating oil to the _____________.
14 214 D The outlet from an expansion tank ofcylinder head water
system should be piped to the ____ outlet header
14 215 C The governor utilized with the deviceIt is necessary to
has become inoperative while the vesdisconnect the shuttle
Which of the following statements valve from the throttle
be taken? lever horizontal bar, in
order to effectively jump
out the pneumatic engine
enable control circuit.
14 216 D The intake valves in a diesel engine cam followers
14 217 A Which letter represents the top deck "A"
shown in the illustration?
14 218 C When preparing to light off a cold b directly to the fuel oil
flow fuel oil system, the recirculatin heater inlet for further
____________. warm-up
14 219 D Small amounts of moisture are necess
tank surface leakage
microbiological organisms found in some marine fuels. Some
sources of water contamination are _________.

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14 220 D Which of the following conditions wiLoss of the forced draft
burner solenoid valves to close on anfan
burner unit, auxiliary boiler?
14 221 B The main function of tie rods in the stiffen the bedplate in
speed diesel engines is to ________ way of the main bearings
to increase the engine's
longitudinal strength

14 222 A Which of the listed types of fuel injeUnit injector

illustration?
14 223 D On most modern diesel engines, the banjo feed
bearings receive their lubricating oil by ____________.
14 224 A The expansion tank in a diesel enginthe highest point in the
system is located at _____________system
14 225 B The burner assembly on an automatica
cycling on and off
fitted with variable capacity, pressure atomizing burners,
maintains steam pressure by ______________.
14 226 A When accumulated carbon at the air entering
in the cylinder
stroke/cycle diesel engine is being removed, you should take care
to avoid carbon _____________.
14 227 C While an auxiliary boiler is operatin More burners will be
following actions will occur if the lighted off.
system detects a steam pressure drop?
14 228 A According to Coast Guard RegulatioThe fuel valve should be
automatically fired boiler has a flamde-energized.
actions should occur FIRST?
14 229 B A sprayer plate used in a return flowpasses through the
installed if the oil __________. whirling chamber before
passing through the
tangential slots
14 230 C In the water level electrode assembly,E
the feed pump should restart when the level of the water reaches
the position indicated by arrow "____".
14 231 C The dashed lines shown in the illustrcooling water lines
the ____________.
14 232 D A unit type fuel injector is used on a meter the fuel
_____________.
14 233 B Lubricating systems for diesel engincamshaft bearings
initially provide lube oil to the engine _____________.
14 234 D What type of bearing is shown in theCollar bearing

14 235 D Which of the following represents th"B" is the camshaft and it

shown in the illustration and its rela rotates at one half of the
crankshaft speed.
14 236 A If the valve tappets in a diesel engineopen late and close early
 clearances than those specified by the engine manufacturer,
those valves will _____________.

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14 237 A Regarding a Diesel engine crankcase, the general arrangement
and installation should preclude the possibility of ________.

14 238 A The growth rate of microbiological organisms as found in some

fuel supplies will __________.

14 239 C The water in an auxiliary boiler should be chemically tested daily

for alkalinity and _________________.
14 240 C The primary function of a flame safeguard system, as used on an
automatically fired auxiliary boiler, ____________.
14 241 B A diesel engine crankcase ventilation system ______________.

14 242 C Which of the fuel injection systems listed uses a spring loaded
differential spray needle valve and an individual pump for each
cylinder?
14 243 A Proper lubrication of the main bearings is more easily obtained in
a single acting four-stroke/cycle diesel engine than in a single
acting two-stroke/cycle diesel engine because ____________.

14 244 D The interior of some diesel engine saltwater heat exchangers are
protected from corrosion by the use of __________.
14 245 D The devices labeled "1" and "2" shown in the illustration are
properly termed the ________.
14 246 C Increasing the valve clearance between a valve stem and rocker
arm, will result in the valve _____________.
14 247 D The diesel engine rocker arms shown in the illustration serve to
_____________.

14 248 B Internal combustion engine crankcase vent outlets must be

equipped with ______.
14 249 D The purpose of designing some waste heat boilers with sinuous
fire tubes, is to ____________.

14 250 B The amount of chloride content in the water of an auxiliary boiler

can be reduced by ____________.
14 251 B What function is provided by the crankcase ventilation system on
 some diesel engines?

14 252 B Fuel injection pumps using the port and helix metering principle
requires the use of a ___________.
14 253 A Lubricating oil is supplied to the crankpin bearings in a marine
diesel engine by _____________.
14 254 A Sacrificial zinc anodes are used on the saltwater side of diesel
engine heat exchangers to _____________.

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14 255 C The fuel supply system to an automati
salinity is abnormally
automatically shutdown if the boil high
14 256 B What is the function of device "B" shIt serves to heat
incoming feedwater.
14 257 B In readying an auxiliary water-tube bThe safety valve escape
test, which of the following procedu piping should be
to filling the boiler with fresh water disconnected from the
valve body and a blank
inserted.
14 258 B Constant capacity pressure atomizingautomatically increasing
automatically fired auxiliary boilers,the fuel/air ratio
demand by ____________.
14 259 D Which of the following conditions c Increased suction head
an auxiliary boiler to lose suction? pressure
14 260 A Coast Guard Regulations (46 CFR) spe
only before, or
system, on a small automatically fired
simultaneously with, the
energized ____________. opening of the fuel oil
valve
14 261 C The crankcases of many diesel engine
improve fuel economy
vacuum to _____________.
14 262 C The rate of cylinder lubricating oil the same, whether at
large, low-speed, main propulsion diesea, or during
______________. maneuvering
14 263 D On a medium-speed main propulsionadspindle lubricator
or crank journal bearings receive lubricating oil from
14 264 B The amount of oil atomized by the reamount of air admitted to
atomizer, used with some automaticall
the atomizer
by the _______________.
14 265 B An automatically fired auxiliary boi low boiler pressure
Regulations (46 CFR) to be shutdown as a result of
14 267 D Fins are installed on the generating prevent soot fires in the
boilers to ____________. exhaust system
 14 268 B Subtracting the return flow meter re circulated by the system
meter reading on a boiler equipped with a return flow fuel oil
system, determines the amount of oil ____________.
14 269 D The amount of fuel oil atomized by aheader supply valve
directly controlled by the ____________.
14 270 A In a fire-tube auxiliary boiler, you s crown sheet
scale on the waterside of the ____________.
14 271 D The crankcase of many diesel engines
scavenging action of the
vacuum by the ______________. piston

14 272 B Each diesel engine cylinder shown inunit injector

with a/an __________.
14 273 C Lubricating oil systems for diesel enSplash
usually lubricated by which of the following types of lubricating oil
systems?

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14 274 C Which of the listed item numbers rep"4" and "5"
of the bearing shown in the illustration?
14 275 D The rocker arms of the diesel engine"C"
are indicated by ___________.
14 276 C Which of the following conditions c Clogged air intake filters
temperature to develop in the intake manifold of a four-
stroke/cycle, turbocharged, diesel engine?
14 277 C When may the crankcase ventilation Propulsion
p engines
two or more engines be connected? under 1000 shaft
horsepower may share a
common crankcase vent
provided the oil drains
remain separate.

14 278 C Which of the following statements dThe dying bacteria will

growth of microbiological organismscause a coating to be
formed on the sides of
the tank thereby
decreasing corrosion.
14 279 B If the feed pump for an auxiliary boilhigh steam pressure in
water to the boiler, the cause may the boiler

14 280 D When lighting off an auxiliary boilerCold fuel oil

could cause the burners to sputter?
14 281 D Which of the following actions shouClean the flame scanner
each watch when the auxiliary boilerphotocell window.
 14 282 D Which of the listed types of fuel injeCommon rail
diesel engine shown in the illustration?
14 283 B Lubrication for the main reduction goil from the main engine
is usually supplied by ___________ sump
14 284 B When there is a flame failure in an aair supply is shut off
boiler, the ____________.
14 285 B Excessive vibration of an automaticalair or water in the
be caused by _____________. furnace
14 286 D Cooling the intake air supplied to a reduce mean effective
_____________. pressure
14 287 A Which of the listed items should be Electric power
any maintenance on a solenoid operated air start valve?
14 288 A Burner ignition failure in an automatia burned out solenoid in
would be caused by ____________. the oil supply valve
14 289 A The purpose of a temperature sensingin the event of a flame
stack of a small automatically fired afailure
secure the oil burner _______________.

14 290 B The water in an auxiliary boiler shoutotal dissolved solids

content to determine ______________.
14 291 C From the engine data given in the ill182 cubic inches
volume of any one engine cylinder?

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14 292 B In the jerk pump shown in the illustration, fuel pressure will be the
lowest in piece # _____________.
14 293 D The bearing shown in the illustration serves to ___________.

14 294 A Device "E" shown in the illustration is known as the

_____________.
14 295 D What is to be installed on an internal combustion engine if its
cylinder bore exceeds eight inches?
14 297 A An indication of microbial contamination is ______.

14 298 D According to Coast Guard Regulations (46 CFR), the fuel strainer
installation located in the supply lines to the fuel pump of an
auxiliary boiler, can be provided wit_________.
14 299 B Excessive return oil pressure from a variable capacity return flow
 fuel oil burner system on an automatic auxiliary boiler, will cause
14 300 A The concentration of total dissolved solids in the water of an
auxiliary boiler can increase as a result of __________.
14 301 B The camshaft drive is designed to maintain proper camshaft
speed relative to crankshaft speed. In maintaining this
relationship, the camshaft drive causes the camshaft to rotate at
_____________.
14 303 D Wristpin bearings are difficult to lubricate because of their
oscillating motion and _____________.
14 304 B A three-way thermostatic control valve regulates the diesel engine
cooling water temperature by passing a portion of the water
14 305 D According to Coast Guard Regulations (46 CFR), which of the
following statements is true concerning the water level indicating
devices used with an auxiliary boiler?

14 306 A Automatic burner shutdown in an auxiliary boiler, as a result of a

component failure in the flame safeguard controls, will
14 307 A When an auxiliary boiler is secured and you expect to relight the
unit within six hours, you should _____________.

14 308 D If the combustion control system of an automatically fired auxiliary

boiler fails to restart from the normal shutdown mode, you should
check for ______________.
14 309 A Bottom blow valves are installed on auxiliary water-tube boilers to
_____________.

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14 310 D A sprayer plate marked 32Y20, as used in a return flow fuel oil
system, should only be used with a/an ____________.
14 311 A If the speed of the propeller is 135 RPM, the speed of the engine
camshaft shown in the illustration wi_____________.

14 312 D The purpose of piece #7 in the jerk pump shown in the

illustration is to __________.

14 313 D Mechanical lubricators for diesel engine cylinders are usually

small reciprocating pumps which are _____________.
14 314 B In a diesel engine closed freshwater cooling system, the amount
of coolant flowing through the heat exchanger is controlled by the
14 315 D How is lubrication provided to the device shown in the
 illustration?

14 316 B Which of the following conditions is indicated by the presence of

water in the scavenging air receiver?

14 317 C Component "F" shown in the illustration is called the

_____________.
14 318 A Crankcase explosion relief valves should be of the ________.

14 319 D Which of the following conditions is NOT an indication of microbial

contamination of the fuel supply?
14 320 C The opening of an exhaust valve on a modern, large, low- speed,
main propulsion diesel engine, may be actuated by
14 321 B The speed of the camshaft in a two-stroke/cycle diesel engine,
running at 950 RPM, is _____________.
14 322 D Which of the following statements represents the function of the
plunger flange shown in the illustration?

14 323 B Cylinder lubrication oil for low speed main propulsion diesel
engines is admitted to each cylinder _____________.
14 324 D Temperature control valves installed in the jacket cooling water
system of a diesel engine, modulates the rate of water flow
through the __________.
14 325 B In comparison to straight flow mechanical atomizers, return flow
atomizers provide relatively uniform atomization over a wide firing
range due to the ____________.

14 326 A A restricted air intake to a diesel engine may result in the engine
_____________.

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14 327 C What prevents the thrust bearing blocks shown in the illustration
from rotating within the housing?
 14 328 D The injector rack of the diesel engine shown in the illustration is
indicated by the component labeled _________.
14 329 B Explosion relief valves on diesel engine crankcases should
relieve the pressure at not more than _________.
14 330 B Which of the following conditions is NOT an indication of microbial
contamination?
14 331 B In a four-stroke/cycle diesel engine, the camshaft rotates at
_____________.
14 332 A What is the purpose of the "window" installed in the housing of an
individual jerk pump?

14 333 A For diesel engine piston cooling, lubricating oil can be supplied to
the pistons by a/an ____________.
14 334 D The jacket water temperature in a diesel engine closed
freshwater cooling system is normally controlled by
_____________.
14 335 C Variations in the amount of fuel oil burned in a return flow type
burner, are controlled by the ____________.
14 336 A On a turbocharged, medium-speed, diesel engine, which of the
following problems is an indication of a restricted air intake
passage?
14 337 C In the water level electrode assembly, shown in the illustration,
the leads indicated by letter "F" would be wired to the
14 338 B The water in an operating auxiliary boiler should be tested for
alkalinity and chloride content each __________.
14 339 C Coast Guard Regulations (46 CFR) require that the flame
safeguard control system for an automatic boiler, should
_____________.

14 340 B The closing of the exhaust valves used on a modern, large, low-
speed, main propulsion diesel engine may be directly provided by
14 341 C In a two-stroke/cycle diesel engine, the camshaft rotates at
_____________.
14 342 C In the jerk pump shown in the illustration, piece #1 connects
directly to the __________.
14 343 C Oil for piston cooling is delivered through the connecting rod to a
compartment in the piston head, then distributed as a result of
piston motion, and finally drained to the crankcase through one
or more holes or pipes. This procedure is known as the
_____________ .

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14 344 A Why do most temperature control valChanging the rate of flow
 freshwater cooling systems vary the in the jackets could
the cooler instead of through the en cause localized hot
spots.
14 345 C Item "7" shown in the illustration is magnetic pickup used to
sense shaft speed
14 346 B An indication of a diesel engine air low firing pressure and
is ____________. low exhaust
temperatures
14 347 D Which of the components listed is use
"C"
engine speed shown in the illustration?
14 348 C An important design characteristic ofopen slowly to permit a
a diesel engine is the ability to ___ gradual reduction of
crankcase pressure

14 349 C Which chemical listed is utilized to Bleaches

microbial infections occurring within fuel storage systems?
14 350 C Which of the following statements deThrough the outer barrel
enters the whirling chambers of the stube.
auxiliary boiler return flow fuel oil system?
14 351 B If a four-stroke/cycle diesel engine 525 RPM
speed of the camshaft will be _____________.
14 352 A In the exploded view of the jerk pump
rotate the plunger flange
the purpose of the slot on piece #27 on piece #26
14 353 D Shaker, circulation, and spray are t pre-injection fuel oil
used in _____________. treatment
14 354 C For proper operation, auxiliary boil High oxygen
of the following characteristics? concentration
14 355 A The most common cause of scale form
concentrations of
is ______________. calcium sulfate in the
boiler water
14 356 C If over a period of weeks the air-boxopen air-box drains
diesel engine, operating at full load, appears to be dropping off,
the cause can be _____________.
14 357 C Some automatically fired auxiliary bthird leg of the water
water level electrode assembly shown
level
i electrode assembly
type of water level control, the burner circuit is completed through
the ____________.
14 358 A Before an auxiliary boiler is shutdo 10
time, the water in the boiler should have a pH value of
14 359 A Which of the following statements cVisible indicators require
controlled auxiliary boiler system a manual resetting.
Coast Guard Regulations (46 CFR)?
14 360 B According to Coast Guard RegulatioThe illustrated
following statements is true concerniarrangement may be
device for the auxiliary boiler shownused on any steam
boiler, for any steam
pressure, up to 300 psig.

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 United States Coast Guard
14 361 C The component labeled "H" shown incold
th start injector
__________.
14 362 A The purpose of the delivery check val
assist in a quick cutoff of
injection jerk pump is to _________ fuel injection
14 363 B The method of piston cooling in whicquaker
connecting rod to a compartment within the piston, then
distributed by the motion of the pistons, and allowed to drain to
the crankcase via one or more holes or pipes, is termed

14 364 C How much will the jacket water temp1° to 5°F

between the inlet and outlet of medium or high-speed diesel
engines?
14 365 B The engine block assembly and found
The clearance at "F1"
right of the thrust collar shown in thehas always been a
necessary to provide the clearance i surreptitious matter to
most design engineers
and is required for proper
astern operation.

14 366 B The fuel injector for the diesel engine"H"

indicated by the letter ________.
14 367 D Which statement regarding the arranThey may be omitted on
explosion relief valves used on an inall engines having a
true_____________? cylinder bore of nine
inches or less
14 368 D Proper housekeeping to prevent the fsteam coils
growths within a fuel system includes the prevention of water
accumulations and the use of _______.
14 369 A Excessive alkalinity of the water in caustic embrittlement of
____________. the boiler metal
14 370 A Two solenoid control valves are requlow water
auxiliary boilers, and will simultaneously shut off the fuel in the
event of _______________.
14 371 C Diesel engine waste heat boiler constr
cyclone furnace boiler
tube or _____________. type
14 372 B The procedures recommended for aux
treating with oxygen
salinity include ____________. scavengers
14 373 C The solenoid valves in the fuel oil s a decrease in feed
fired auxiliary boiler, are automaticatemperature
14 374 C Which of the following conditions Injection pressures
operating a large, low-speed, main propulsion, diesel engine at
low loads?
14 375 C In the event of a flame failure in an relight the boiler
must ______________. immediately to prevent
 loss of steam pressure

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14 376 A If the intake, or exhaust valve stem clearance is found to be
excessive, in addition to too little movement of the rocker arms,
you should check for _____________.
14 377 A Improper maintenance of the fuel oil burners in an automatically
fired auxiliary boiler, could result in ____________.
14 378 A The concentration of dissolved solids in the boiler water of an
auxiliary boiler could increase as a r___________.
14 380 C Failure of the feed pump to deliver feedwater to an auxiliary
boiler could be caused by _______________.
14 381 D Why should the main steam stop valve of an auxiliary boiler be
eased off its seat and then gently closed before lighting off?

14 382 B One function of the fuel pump delivery check valve is to

_____________.

14 383 B For any piston ring to operate smoothly without scuffing, the ring
must be _____________.
14 384 B Using a cooling water temperature of 225°F (107.2°C), instead of
180°F (82.2°C) in an auxiliary diesel engine, will
______________.

14 385 D After following the prescribed procedures to measure the thrust

bearing clearance shown in the illustration, the distance "f" is
determined to be 200 mm, and "f1" is 2.3 mm. Which of the
following statements describes the condition indicated by these
dimensions?

14 387 C Flame failure in an automatically fired auxiliary boiler can result

from a/an ______________.
14 388 D How many crankcase relief valves are required for a 13 inch
bore, eight cylinder in-line engine?
14 389 D If the fuel/air ratio in an automatically fired auxiliary boiler is
insufficient, the result could lead to __________.
14 390 B Which of the following actions should normally be taken during
each watch when the auxiliary boiler is in operation?
 14 391 C Under which of the following conditions must the combustion
control system for a small automatic auxiliary boiler secure the
burner?
14 392 B The primary function of a fuel delivery check valve assembly is to
_____________.

14 393 A The upper piston rings in large, slow-speed, two-stroke/ cycle

diesel engines are most effectively lubricated by oil

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14 394 A Operating a diesel engine for prolon the formation of sulfuric
freshwater cooling system, at temperacid
design temperature can cause _____________.
14 395 C A pulsating flame, accompanied by aelectrode setting is
smoke in an auxiliary boiler, is an inincorrect
14 396 B The diesel engine cylinder scavengincrossflow scavenging
example of ____________.
14 397 D Which of the following actions shouTest boiler water
each watch when the auxiliary boileralkalinity
14 398 D Flame failure in an operating automatbroken electrode
can result from a _____________. insulator

14 399 B A failure of any component of a flama furnace explosion

auxiliary boiler will result in ____________.
14 400 C The daily inspection of an operating lifting of all safety valves
____________.
14 401 C The camshafts on the engine, shown twice
in the crankshaft
a speed equal to _____________. speed
14 402 C Where is the fuel delivery check val In the cylinder head
injection system?
14 403 A The thrust bearing shown in the illusNo appreciable wear has
ahead running time. Measurements soccured, and the proper
1mm. Which of the following conditimaintenance procedures
steps should be taken, if any? should continue to be
followed.

14 404 C As a general rule, the recommended 120°

o to 139°F
temperature range for medium and high speed marine diesels
with closed cooling systems is ______________.
14 405 C Which of the fuel injectors listed is iSolid jerk
shown in the illustration?
14 406 C The method of scavenging used in thuniflow scavenging
the illustration, is known as ____________.
 14 407 B What is the primary function of itemIt removes the vapor
illustration? condensed in area "23".

14 408 C If a tube ruptures in a water-tube auxsecure the fires and

you should ____________. maintain feedwater to
boiler to keep up the
water level
14 409 B An automatically fired auxiliary boi flame failure
on its burner electrodes, will experience _________.

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14 410 D An exhaust gas bypass is installed on a waste heat boiler in order
to ____________.

14 411 B The RPM of "A" is 100 and hobbed with 80 teeth. If gears "B",
"C", and "D" have 62, 20, and 38 teeth respectively, the RPM of
"D" in the gear train illustration is __________.
14 412 B The delivery valve installed in a port and helix fuel injection pump
is designed to ____________.

14 413 D The fuel oil supply system to an automatic auxiliary boiler, will
automatically shutdown if the boiler _____________.
14 414 D A closed freshwater cooling system is commonly used with
marine diesel engines because the _____________.

14 415 C The diesel engine exhaust gas bypass, as fitted with some waste
heat boilers, is installed to ____________.
14 416 D "Loop," "uniflow," "crossflow," and "return-flow" are terms used to
describe various types of _____________.
14 417 A Oxygen corrosion in auxiliary boilers is prevented by treating the
boiler feed tank with either sodium ____________.
14 418 A Coast Guard Regulations (46 CFR) require a trial for ignition
period must not exceed ____________.
14 419 A A bypass line provided around a waste heat auxiliary boiler in a
diesel engine exhaust system, may be used to avoid boiler
14 420 A The concentration of total dissolved solids in the water of an
auxiliary boiler can increase as a result of ___________.
14 421 B In the auxiliary diesel engine, shown in the illustration, the
_____________.

14 422 C The jerk pump delivery check valve pump shown in the
 illustration, is closed by ___________.
14 423 B Which of the listed sequence of events occurs when an
automatic auxiliary boiler is prepurged?

14 424 C High stack temperature occurring in an auxiliary boiler could be a

result of ____________.
14 425 D A firebox explosion in an automatically fired auxiliary boiler may
be the result of ______________.
14 426 A The principal difference between loop scavenging and crossflow
scavenging, as used in single acting diesel engines, is the

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14 427 D What is the normal bearing clearanceThe tolerances
axis of the shaft for the bearing showestablished are
dependent on machining
processes used and will
vary amongst
manufacturers.

14 428 C Which letter represents the entrance "D"

the cylinders of the engine shown in the illustration?
14 429 B An inline engine having a nine inch incorporate the use of
cylinders will _________. two explosion relief
valves
14 430 C The PRIMARY function of a waste he
reduce engine exhaust
noise
14 431 A The speed of the diesel engine camsha
half that of the crankshaft
would be _________.

14 432 C Fuel droplets injected into a diesel prolong the ignition delay
adequate penetration to __________period
14 433 A A coil-type automatically fired auxilithe manufacturer's
for an indefinite period. The boiler wrecommended pH is
ensure that ____________. maintained
14 434 C In a diesel engine closed freshwater 4 psig
cooling water pressure drop through the engine is 10 psig, and
the pressure drop through the heat exchanger is 4 psig. The
cooling water pump must produce a discharge head of at least
 14 435 A Coast Guard Regulations (46 CFR) re
fuel cutoff as a result of
low pressure heating boilers to have low water
14 436 C Collapsed hydraulic valve lifters in aexcessive rocker arm
____________. movement
14 437 C Large, two-stroke/cycle, main propulexhaust gas temperature
can be successfully pressure chargedsystem
using the ___________.
14 438 B Control of the fuel oil metering valv pressure magnifying
auxiliary boiler is accomplished by device in the steam coil
outlet
14 439 D A safety valve on an auxiliary boile loose dirt on the seat
not be stopped by several quick blow-offs using the hand relieving
gear. The problem may be __________.
14 440 B A burner responsible for producing defective solenoid valve
auxiliary boiler, would be caused by a __________.
14 441 A Which of the following types of fee Thermomechanical
used with a water-tube, natural circulation, auxiliary boiler?
14 442 C Fuel injection systems meter fuel, at create turbulence in the
_____________. combustion chamber

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14 443 A A SECONDARY function of a waste heat boiler is to _________.

14 444 D An electric heater built into some smaller diesel engines is used
to _____________.

14 445 D What is the maximum allowable clearance permitted between the

bearing, shown in the illustration and the shaft along its vertical
axis?
14 446 B Which of the air intake systems listed will result in the lowest
specific fuel consumption?
14 447 D Which letter represents the exhaust gas exit point for the diesel
engine shown in the illustration?
14 448 C Engines having a bore exceeding 250 mm, but not exceeding 300
mm are to have at least _________.

14 449 A An auxiliary boiler is equipped with a return flow fuel atomization

system, which uses a/an _____________.
14 450 B Overfiring of a hot water boiler may be caused by _________.
14 451 D What is the speed of the crankshaft in a four-stroke/cycle engine
when the camshaft is turning at 750 rpm?
 14 452 C In the large slow-speed main propulsion diesel engine shown in
the illustration, the part labeled "G" _____________.
14 453 D The pressuretrol is installed on an auxiliary boiler to sense steam
pressure changes, it _______________.

14 454 A In a diesel engine closed freshwater cooling system employing a

radiator, proper water temperature can be obtained by
_____________.
14 455 D If the combustion control system of an automatically fired auxiliary
boiler fails to relight the burner after a normal shutdown, you
should check for a/an ____________.
14 456 B A waste heat boiler is installed on some diesel propelled vessels
to _____________.
14 457 B Why should handhole gaskets not be allowed to leak on an
auxiliary boiler?

14 458 D Automatic combustion control systems for auxiliary boilers are

designed to cycle burners on and off in response to the
14 459 B The variation in the amount of fuel oil burned in the operation of
an auxiliary boiler, utilizing a return flow type atomization system,
is a function of the _____________.
14 460 C Which of the following conditions could cause black smoke to be
discharged from the stack of an auxiliary boiler equipped with
turbine-driven rotary cup atomizers?
14 461 B Camshafts are usually driven by timing gears or ___________.

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14 462 D The main difference between an "APplunger
injection pump, is the design of the ____________.
14 463 B The maximum pressure developed bygas composition
determined by the main engine exhaust ____________.
14 464 C Which of the listed effects would miIncreases the rate of
phosphate compounds have on the met
heat transfer
system of a diesel engine?

14 465 B Which of the listed parts on a fire-tuCleanout plug gaskets

written report to the Officer-in-Charge of Marine Inspection when
renewed?
14 466 C Automatic combustion control system
fuel supply pressure
are designed to cycle burners on and off in response to
14 467 D Waterside scale in a fire-tube boil increased heat transfer
14 468 B With regards to a diesel engine cran I only
violent is the _____________. I. primary explosion II.
 secondary explosion
14 469 D When an auxiliary boiler is panting increase the fuel oil
should _____________. temperature
14 470 D Bottom blow valves are installed on completely drain the
_____________. boiler in an emergency

14 471 D The reversing mechanism on a directbring the respective cam

main propulsion diesel engine, operaunder the fuel pump
can serve to _____________. roller
14 472 A What function is served by the sprin It closes the nozzle valve
illustration? when the release port is
uncovered.
14 473 A The correct procedure for giving an awhen the boiler has been
blow, is to begin _____________. secured long enough for
most solids to settle

14 474 A If the chemical analysis of a lube oi acidity has increased

engine indicates an increased neutralization number the
14 475 A The diesel engine water inlet jumper"M"
the letter or number _________.
14 476 A Additional explosion relief valves argross volume of such
the crankcase such as gear or chain cspaces exceeds 21 cubic
similar drives when the __________feet

14 477 A A two stroke diesel engine exhaust t I only

a four stroke diesel engine of the same displacement because the
___________. I. scavenging air is cooling the exhaust gases
II. exhaust cycle time is longer
14 478 A With which of the following types ofSupercharged, four-
is a waste heat boiler most likely stroke/cycle diesel
pressure, temperature, and flow co engine

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14 479 D During maintenance inspections of a fire tube auxiliary boiler, you
should check for _____________.
14 480 A The constant capacity, pressure atomizing, fuel oil burners
designed to meet a wide variation in the steaming loads of an
auxiliary boiler, are ________________.
14 481 D The camshaft on a four-stroke/cycle diesel engine provides a
means to operate the _____________.
14 482 B The item labeled #16 in the illustration is a stack of spring
washers. Their function is to ________________.
 14 483 B An 8000 horsepower diesel engine has a specific fuel
consumption of 0.4 lbs. of fuel per horsepower hour. If each
pound of fuel contains 18,500 BTU's and 25% of the available
heat leaves the engine with the exhaust, how many BTU's per
hour are theoretically available for use in a waste heat boiler?
14 484 C Antifreeze solutions containing ethylene glycol, should not be
mixed with corrosion protection oils, as the resultant mixture
14 485 C Coast Guard Regulations (46 CFR) permit tubular type water
gage glasses on auxiliary boilers, provided the maximum
allowable working pressure does not exceed ________.
14 486 C In an automatically fired auxiliary boiler, restarting from the normal
shutdown cycle in response to steam demand, is initiated by a/an
______________.

14 487 D Which of the following methods is typically employed in the design

of waste heat boilers to obtain maximum heat transfer, while
maintaining low overall weight?

14 488 C According to Coast Guard Regulations (46 CFR), which of the

following pressures is the highest boiler pressure where a tubular
type gage glass may be installed?
14 489 A At the beginning of the prepurge period on an automatic auxiliary
boiler equipped with a programmed control system, the unit will
not restart if airflow is not sensed an______________.
14 490 B A properly adjusted safety valve for an auxiliary boiler will
____________.

14 491 B In the illustrated engine, the fuel camshaft gear drive housing is
letter _______________.
14 492 D Fuel injector nozzles are usually of the multi-orifice type with the
number and placement of the holes arranged according to the

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14 493 C The proper main diesel engine prestaAs the reversing lever is
the speed setting lever positioned forrepositioned, the air
lever is in the neutral position as sh supply to "27B" is
of the following statements descri vented, causing the three
reversing lever is placed in the ahea position cylinder to be
aligned to a position to
nullify the input signal.
 14 494 D Ethylene glycol, when used as a coolprovides a constant pH
system for a diesel engine, is more below 7
raw water because it _____________.
14 495 B The water inlet manifold, for the di "M"
illustration, is represented by the letter or number ______.
14 496 D Additional explosion relief valves aroverall volume of such
the crankcase, such as gear or chain spaces exceeds 21 cubic
similar drives, when the _______. feet

14 497 B When conducting a hydrostatic test ominimize the coefficient

boiler, the test water should be heateof expansion within the
least 70°F. This is done to _______ varying types of metals
used in boiler
construction
14 498 A A photoelectric cell installed in an a opens the burner circuit
boiler burner management system upon sensing a flame
failure
14 499 B The maximum allowable working pre165 psig
auxiliary boiler is 200 psig. The normal working pressure for one
particular packaged boiler is 175 psig. Which of the following
safety relief valve settings would be proper for this boiler?
14 500 C Coast Guard Regulations (46 CFR) req
2 air changes
automatic steam boilers, and hot water boilers shall be equipped
with a prepurge programming control that will assure at least
14 501 B The valve cam slope angle determin engine torque
characteristics
14 502 A The rate of fuel injection in a diese the size of the holes in
primarily on _____________. the fuel nozzle
14 503 C A smoking burner with a pulsating fla
fuel oil supply
an indication that the ____________temperature is normal
14 504 C According to the chart shown in the iA 100% ethylene glycol
following statements is true concernisolution gives the
diesel engine cooling systems? greatest protection
against freezing.

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14 505 C On an automatically fired auxiliary bsound an alarm when the
switch is wired into the burner elect burner is shut off
 14 506 B A variable capacity, pressure atomizimaintain a constant fuel
to ____________. temperature
14 507 B The firing range of a variable capacifuel oil damper setting
atomizer is regulated to meet steam demand by varying the
14 508 D Excessive vibration from an auxiliarcombustion pulses
____________.
14 509 A After lighting off a cold, automaticallclose the air cock
steam begins to form, you should ___________.
14 510 B In a coil-type forced circulation auxisteam is recirculated
_____________. through heating coils in
the boiler
14 511 D The shape of a diesel engine cam d points of opening and
closing of the valve
14 512 B Which of the fuel nozzle types listedPintle

14 513 C Which of the following devices is noDuplex strainer

starvation in a diesel engine lubrication system utilizing the "full
flow" principle?
14 514 D Corrosion inhibitors and/or soluble omaintain low pH in the
cooling systems to _____________. cooling water
14 515 D As shown in the illustrations, the ah The position of the
selected by the diesel engine controlreversing control valve
position cylinder moving downward.directs pressurized oil
statements describes the next sequento the running direction
safeguard, a two position
hydraulic rotary actuator
with a 98‚ arc movement.

14 516 C The cooling water system for the die"M", "N", "9", "5", and
illustration flows through the inlet m"W"
through cylinder liner/head assembly, and out the water
discharge manifold. Which of the listed lettered sets represents
this circuit?
14 517 B Cylinders diameters greater than 23 Tri-knock fittings
safety devices when the scavenging spaces are openly
connected to the cylinders. Which of the following devices will be
used to protect such spaces?
14 518 C If poor combustion occurs in an auxilreset the pressure limit
damper linkage being out of adjustmcontrols
linkage and then _____________.
14 519 B Which of the automatic boiler controlAutomatic bottom blow
prior to lighting off an auxiliary boilvalve
system high tension
leads

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14 520 A Which of the following conditions would cause "panting" in a
steaming auxiliary boiler?
14 521 B The valve cam slope angle determines the _____________.

14 522 C Carbon deposits building up, in, and around the injection nozzle
tip are least likely to occur when using which of the listed types of
fuel injector nozzles?
14 523 B The standard diesel engine lubricating oil filtering system shown
in the illustration is classed as a _____________.
14 524 C A large low speed main propulsion diesel engine may become
overloaded by_______________. I. a heavily fouled hull II.
strong head winds and heavy seas
14 525 C Which of the following statements concerning the operation of a
coil-type forced circulation auxiliary water-tube boiler is correct?

14 526 D If oil is dripping from the burner of a coil-type auxiliary steam

generator, the cause may be _____________.

14 527 B Coast Guard Regulations (46 CFR) require electric hot water
supply boilers to be provided with a/an _____________.
14 528 C Coast Guard Regulations (46 CFR) require the programming
control sequence for auxiliary boiler operation to include
_____________.
14 529 B In a forced circulation auxiliary boiler, steam is formed in the
____________.
14 530 A Ignition failure in an automatically controlled auxiliary boiler can
be caused by ______________.
14 531 B The arrangement and shape of the cams on a diesel engine
camshaft directly control which of the listed groups of operating
conditions?
14 532 C Fuel injectors used in heavy fuel oil systems are usually provided
with cooling to reduce _____________.
14 533 C A spring-loaded relief valve is located on some lube oil filters in
full flow systems to _____________.

14 534 D A diesel engine cooling water system with a pH factor of 3.0

indicates a condition of ____________.
14 535 B The reversing servomotor shown in the illustration is in position
and the engine is about to be restarted. Which statement
describes the proper valve position alignment?

14 536 D The main lube oil manifold, for the diesel engine shown in the
illustration, is represented by the le _________.
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14 537 C What is required for crosshead type engines that have a
scavenging space in open connection to the cylinder?

14 538 C A sudden flame failure in an operating auxiliary boiler, equipped

with an automatic combustion control system and burning light
fuel, could be attributed to a ______________.
14 539 C The flame safeguard controls of a large automatically fired
auxiliary boiler, may consist of a ____________.
14 540 C Coast Guard Regulations (46 CFR) permit the use of which of the
following fuel oil ignition methods on automatic auxiliary boilers?
14 541 C Where is the cam follower most likely to leave the surface of the
cam?
14 542 A Which of the following statements concerning fire-tube boilers is
correct?
14 543 C Which of the following statements about a coil-type forced
circulation auxiliary water-tube boiler is correct?

14 544 A In a diesel engine cooling water system, a pH of 6.0 indicates

a/an ______________.
14 545 B Indirect cooling of fuel injector nozzle holders for diesel engines is
accomplished primarily by ____________.

14 546 D What is the function of the "running direction safeguard", shown

in the illustration as item "5.01"?

14 547 A Component "U" of the diesel engine shown in the illustration is

called the ________.
14 548 D In which of the following areas of a crosshead engine is a
permanently connected fire extinguishing system required?
 14 549 A Ignition failure in an auxiliary boiler can be caused by
_____________.
14 550 C Which of the clutch types listed is shown in the illustration of the
reversing reduction gear unit? (See illustration MO-0085)

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14 551 B When two cams of the same diameter,
greater valve lift
and the other with convex flanks are compared, the cam with
tangential flanks will cause___________.
14 552 A The long drilled passages shown in thcooling water flow
view II-II are for ____________.

14 553 D The axial thrust of the coupling shown

ring valves are in the
separate the runner and impeller dur open position
14 554 B The pH value of water in a diesel en6.0 to 7.5
system should be maintained between _____________.
14 555 A If the wearing rings of device "7" shThe rate of evaporation
worn, how will the evaporation rate will decrease.

14 556 A Part "G" of the device shown in the ito bleed off accumulated
____________. water that would prevent
the operating slide from
moving down
14 557 D The purpose of the safety relief valverelieve excess fuel oil
boiler is to ____________. pressure during the "off"
fire cycle
14 558 B An AC diesel generator incapable ofincrease speed droop in
main bus normally employs an isochrproportion to load
_____________.
14 559 B The most common contaminate of gov
moisture
14 560 C The component labeled "F" on the d in the down position as a
illustration, during the normal opera result of establishing the
be ______________. water flow through "Q"

14 562 A Which of the substances listed is sa Carbon particles

fuel by a centrifugal oil purifier?
14 563 C A magnetic strainer is used in the di water
system to remove small particles of _____________.
14 564 A A two stroke diesel engine exhaust t I only is correct
a four stroke diesel engine of the same displacement because the
__________. I. mep is lower and the scavenging air is cooling
the exhaust gases II. valve overlap in a four stroke diesel
engine is greater

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14 565 D The component labeled "5.26", shown
If an
i electrical failure
"pneumatic fuel pump cutout device"occurs, the solenoid de-
statements correctly describes its op energizes permitting
spring force to shift the
valve to actuate the
cutout device by way of
the pneumatic signal.

14 566 D Two inflatable clutch glands are pro this is a two-speed gear
reduction gear illustrated because _____________.

14 567 B The device labeled "B" in the illustr crankshaft rotating at

twice the speed of the
camshaft
14 568 A Which of the following listed construA warning notice to
combustion engines is required? caution against the
opening of a hot
crankcase for a specified
period of time after shut
down.
14 569 D The safety valve installed on a coil-tthermostat tube
on the ____________.
14 570 C In the schematic diagram of the iso pilot plunger
shown in the illustration, piece #22 is the ____________.
14 571 B Which of the following statements isThey are bimetallic
limit switches and pressuretrols instaelements sensing
temperature
differentials
corresponding to
pressure changes.
14 572 B A port-and-helix fuel injection pum vary fuel delivery and
plunger helixes is designed to ____ return pressure
14 573 D The lube oil strainer shown in the illpleated paper
reduction gear of a mid-size diesel engine. The strainer elements
consist of ___________.
14 574 C When checking zincs in a saltwater paint the zincs to stop
should _____________. corrosion
 14 575 A The axial thrust of the coupling shown
coupling is partially filled
draw the runner and impeller toget with fluid
14 576 B The part labeled "R" on the device shprevent part "F" from
used to _____________. independently rotating

14 577 C In reducing engine speed to an efficispeed and torque are

use of reduction gears, ___________both reduced

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14 578 D One advantage of hydraulic clutchesthe power is transmitted
diesel engine installations is _____ at a very high efficiency
of 60%

14 579 D A diesel generator governor is huntincheck air intake manifold

governor is flushed and the compensa
pressure
adjusted; but the hunting persists. You should NOW
14 580 C The port labeled "H" of the device sho
prevent water from
used to ______. accumulating beneath
the operating slide

14 581 A In order to reverse the rotation of a starting air and fuel

scavenged, direct reversing, propuls pumps
positions must be changed for the _____________.
14 582 C Some fuel injection systems utilize Injection has a variable
of the following statement describes beginning and a constant
closing"? ending.
14 583 A During a routine round of a diesel e leakage through the
a low oil level in the governor sump.governor drive shaft oil
external leakage, you should suspectseal
14 584 B The liquid line labeled "Q" on the deinitiate the bowl opening
is used to ____________. procedure for the self-
cleaning cycle

14 585 A A continuous fluctuation of the spee hunting

governor, is known as _____________.
14 586 B Airflex clutches are used to transmi delay deflation of the
the propeller shaft. A restricted orifi clutch being disengaged
system of this unit to _____________.
14 587 A The purpose of try-cocks used on an provide
a an alternate
 ____________. means of determining
the water level, if the
gage glass fails
14 588 B The device shown in the illustration "F"
manually activated for self-desludging. The desludging process is
initiated by which of the labeled components listed below?
14 589 B When an additional load is applied t chipped reduction gear
using an air bladder clutch unit that teeth
can expect _____________.
14 590 D A diesel engine is equipped with an decrease only
governor. A decrease in load will cause the engine speed to
____________.
14 591 A The reversing cams of some four-strosliding the camshaft
brought into position by _________ along its axis

14 592 A Which of the following statements deInjection has a constant

marked "timed for port closing"? beginning and variable
ending.

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14 593 C The device shown in the illustration
manually desludged. The closing sequence at the end of the
desludging cycle is initiated by opening which of the labeled
components listed below?
14 594 C The thermostatic valve in the illustra
the coolant temperature in a main pr
Which of the following can be used t
operation with the valve disassembled?

14 595 B When would it be become necessary t

"4.07", shown in the illustrations?

14 596 C The diesel engine component labeled

illustration is called the _______________.
14 597 B Internal combustion engines are to be
prevent the engines from exceeding the rated speed by more than
14 598 C To stop the diesel engine governor f
 oil system is to be purged of trapped air by adjusting the part
shown in the illustration labeled _________.
14 599 A Slippage of an air operated friction
_____________.
14 600 B Misalignment of the drive shaft and
detected by using a dial indicator or _____________.
14 601 D From the data given in the illustratio
are mounted on the same crank throw?
14 602 C A plunger is used in the fuel inject
illustration "timed for port closing."
always have a __________.
14 603 A The sludge ejection cycle of the devic
initiated by the centrifuge when va
14 604 D The temperature at which an adjustab
valve is set by ______.

14 605 D The device shown in the illustration a

__________.

14 606 D The diesel engine component labeled

illustration is called a/an ___________.

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14 607 C In addition to the normal governor, is not required to have
maximum continuous output of 300 hany additional overspeed
declutched or which drives a controllprotection provided a
______________. hydraulic governor is
used

14 608 B Where one or more diesel driven ACgradually reduce its

parallel, reducing the value of the s speed as load is applied
unit will allow that unit to ____________.

14 609 B Torque capacity of the air clutch shoputting in a thinner

increased by __________. friction plate #6
14 610 C Immediately at the end of the sludge"V5" is closed, with
the fuel oil centrifuge, shown in the "V10," "V15," and "V16"
when the valve(s) ______________.are open
14 611 C What is the crank angle between any45°
firing order of a four-stroke/cycle, in line, eight cylinder diesel
 engine?
14 612 A Increasing the load on an engine usi earlier and end later
injection pump varies the effective stroke of the pump to start
14 613 A Effective hydraulic coupling operati slip
amount of _____________.
14 614 D If the cooling water temperature anda dirty lube oil strainer
diesel engine are too high, the cause can be _____________.
14 615 A The gear drive, shown in the illustra feeler gauge
determined best by using a ____________.
14 616 A Regarding the water level electrode "B" and "C"
illustration, the normal water level will ordinarily rise and fall
between ____________.
14 617 C Most large, low-speed, main propulsdecrease the time
lube oil strainer to _____________. required between
cleanings
14 618 A Which of the springs shown in the ill 19
force controlled by the movement of a speed control shaft, and
the engine speed setting will in turn be proportional to the amount
of compression exerted on the spring?
14 619 C While inspecting the main bearings othe bearing had been
impregnated dirt and scratches in th overheated
therefore, suspect that ___________.
14 620 C The gage glass on a coil-type auxiliaheating coil inlet and
______________. outlet
14 621 B The linear motion of a diesel engine flywheel
rotary motion required to drive gears, propeller shafts, and
generators by the _____________.

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14 622 B The port-and-helix metering pumps, timed
u for port opening
systems, are usually designed to produce a constant beginning
and a variable ending of fuel injection. These pumps are usually
14 623 D Where may a strainer be located in aSuction line
system?
14 624 D High diesel engine cooling water te a worn water pump
14 625 C What is the primary function of the Once the servo pump
the illustration as item "4.01"? has developed sufficient
pressure, the servo
motor will provide the
initial signal to release
the fuel blocking valve.
 14 626 D The inlet valves for the diesel engine"2"
indicated by the letter or number ________.
14 627 C Which of the listed problems would Excessive condensation
accumulation of water in one cylinder
in that cylinder.
of an idle diesel engine?
14 628 A One advantage of electromagnetic slitorsional vibrations are
_____________. reduced

instead of rotational
speed between the
primary and secondary
elements

14 629 C If a hydraulic governor has been refilrack position should be

should be operated until it reaches n adjusted
air should be purged, and the _______.
14 630 A Which of the labeled figures illustratA
alignment mark relationships of a properly reassemble
centrifuge bowl?
14 631 D The rotary motion of a diesel enginecamshaft
the up and down motion of the piston via the _________.
14 632 A What are the effective stroke characte
Constant beginning and
pump plunger shown in the illustrati variable ending
14 633 D Unusually low oil pressure in the lubpressure regulating valve
engine is the result of a/an _______ being stuck in the closed
position
14 634 A High diesel engine cooling water te air in the cooling system
_____________.
14 635 B A diesel engine is operating at 1800 0.30 to 1
at 600 RPM. What is the speed reduction ratio?
14 636 B The power loss associated with slip ichattering in the driving
__________. member

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14 637 C In order for the self-cleaning fuel oi bowl locking ring
illustration, to properly operate duri alignment mark should
__________. be approximately 1/4
inch to the left of the
bowl alignment mark
14 638 C The purpose of the compensating adjcompensate for low oil
engine hydraulic governor is to __ level
14 639 B Part "I" of the device shown in the i top or separating disks
_______________.
 14 640 A When the steam pressure drops below
increase the fuel oil
automatically fired auxiliary boiler, control valve opening
the combustion control system will _________.
14 641 C The main reason counterweights are reduce
a piston side thrust
_____________.

14 642 A An individual injection pump is desiadvance as the load

and constant ending of injection. Forincreases
constant speeds, the start of injection will _____________.
14 643 C Diesel engines driving alternators opactuation
maintain a set frequency regardless of load changes. The
governor characteristic used to accomplish this is known as
14 644 C The control system for a controllableI only is correct
programmed ___________. I. to produce a maximum combined
propeller and engine efficiency between pitch and a given engine
speed II. for continuous operation of the engine at pre-set
conditions

14 645 B What medium is used to rotate and thCompressed air is used

the flaps (vanes) of the device shownto shift the device to the
"4.01"? proper position, then
applying hydraulic
pressure to maintain this
position during
maneuvering.

14 646 B The diesel engine component labeledhead valve assembly

illustration is called the _________.
14 647 A At what pressure should a cylinder reThe device should be set
combustion engine be set to relieve?to relieve at a pressure
not more than 40 percent
in excess of the
maximum firing pressure.
14 648 D When changing the direction of propel
fuel rack to readjust
plant equipped with a pneumatic clutch, you must pause at
neutral to allow the _____________.

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14 649 D When reassembling the bowl of the ctoo many disks being left
illustration, the alignment mark on t out of the bowl during
bowl cover mark in excess of the man
reassembly
This is due to ______________.
 14 650 A A schematic diagram of an isochronopilot valve (piece #10)
shown in the illustration. When the moves upward
increases, and the ____________.

14 651 C A viscous damper, as used on a marine

camshaft
precision built device which dampens the torsional vibrations in
the _____________.
14 652 A The end of fuel injection in a port- uncovering a fuel port in
controlled by _____________. the pump barrel
14 653 B Loss of lubricating oil pressure to t overspeed trip
engine will actuate a/an _____________.
14 654 D Higher than normal jacket water temp
oil suction line restriction
cylinders of a diesel engine can result from a/an __________.
14 655 D If the operating speed of a diesel en clogged intake air
apparent change in the engine controintercooler
a ________.
14 656 A Regarding the water level electrode feed pump starts
illustration, arrow "C" indicates the point at which the
14 657 D Trapped air was bled from the hydrauopened until hunting is
governor while it had been operatingeliminated
to restore the correct level and the air vent plug tightened. The
compensating needle valve should then be gradually
14 658 C In the device shown in the illustrati heavy phase discharge
is the ___________. (See illustrati port
14 659 D Automatically fired auxiliary boilersfilter bag type
arrangements of either the simplex type or _____________.
14 660 C When centrifuging heavy fuel oil, anI only is correct
is the _________. I. flow rate II. viscosity of the fuel oil
14 661 B A crankshaft whose center of gravitydynamically balanced
is said to be __________.
14 662 C The amount of fuel injected in a partmetering
crankshaft rotation is termed _____________.
14 663 D In a normally operating diesel engin metal particles loosened
lubricating oil contamination in the cby wear
14 664 C Which of the following problems wilAn air leak in the header
water temperatures in a diesel engin tank cover
cooling system?

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14 665 A The reversing servomotor is shown in
The end position
"4.01". Which of the following state indicator should indicate
subsequent actions to occur after th green and the respective
contact with the respective stop seg control lamp should be
 illuminated.

14 666 C Which of the following statements r Large misalignments can

electromagnetic clutch? be tolerated between the
shaft and engine
coupling.
14 667 C The diesel engine piston illustrated K
labled __________.
14 668 A Two air compressors are provided forcharging the starting air
should be capable of ______. containers within one
hour

14 669 B Which of the following adjustments Speed droop

the diesel engine governor oil has been drained and renewed?
14 670 A The air supplied to a diesel engine i I only is correct
___________. I. provide heat for the ignition of the fuel II.
decrease injection delay
14 671 C The possibility of damage from operaan isochronous governor
critical speeds is reduced by the use of ______________.
14 672 D The position of the fuel injection p zero fuel flow
illustration, will provide fuel delivery to the diesel engine in an
amount approximately equal to ____________.
14 673 A On small diesel engines, a noticeablepiston ring blow-by
interval between the replacement of the lube filter cartridge
indicates ____________.
14 674 C If the jacket water temperature of anan overfilled expansion
suddenly rises above normal, the caus
tank
_____________.
14 675 C On a diesel engine equipped with a haccumulator spring
governor, hunting in many cases cancompression
the _____________.
14 676 A The liquid line labeled "P" in the devinitiate the bowl opening
is used to ____________. procedure for the self-
cleaning cycle

14 677 C In an auxiliary boiler steam and watesteam stop valve

pressure will be in the ____________.
14 678 D How is the diesel engine operating The RPM will drop to low
DROOP" setting is selected on the gidle when load is applied.

14 679 A The clutch glands of the gear unit, shengine speed

rotate at _____________.

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14 680 B When preparing to clean the fuel oil contamination of the
illustration, the bowl must be broughclean fuel oil
14 681 B The diesel engine connecting rod show
marine-type rod
classified as a/an __________.
14 682 C The amount of fuel delivered by a helvarying the pump
pump is controlled by ___________ discharge pressure
14 683 B A dirty diesel engine oil filter eleme visual inspection of the
_____________. elements
14 684 B If the coolant temperature of a close a broken shaft on the
diesel engine gradually increases, thefreshwater pump
_____________.
14 685 C Which of the following statements coLubrication systems
diesel propulsion engines used in vesusing engine driven lube
most accurate? oil pumps do not require
any additional
independent
arrangements when such
arrangements have been
proven reliable.
14 686 B In an electromagnetic coupling, torquoverload trip
limited by the _____________.
14 687 A If an auxiliary diesel engine will not starting batteries
the trouble may be ___________.
14 688 B Increasing the load on an engine equincrease
mechanical governor, will cause the engine speed to initially
14 689 A One operating characteristic of the r engine torque is normally
shown in the illustration, is that onc transmitted to the
_______________. propeller shaft without
slip
14 690 A While operating the fuel oil centrifuggravity disk inside
the fuel oil is being continuously ej diameter is too large
seal water. The probable cause is the ____________.
14 691 C The small end of the connecting rod ci rankpin
a _____________.
14 692 B When the lower edge of the spiral bepumping continues until
port in a jerk pump, the __________the plunger travels its full
stroke
14 693 A The pressure differential across a di determine the need for
duplex filter should be checked to filter cleaning
14 694 C Some diesel engines are fitted with increased blow-by in all
water outlet from each cylinder. If cylinders
from all cylinders begins to rise above normal, you should suspect
14 695 D Proper operation of the main engine the sump oil level
the operator to monitor _____________.
14 696 B The device shown in the illustration heavy phase discharge
labeled "B" is the _______. port
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14 697 C The fuel oil strainers in the fuel oil Sintered metal type
automatically fired auxiliary boiler are permitted by the Coast
Guard Regulations (46 CFR) to be either the simplex type or the
14 698 C The torque transmitted by an electroengine speed
dependent upon excitation and the _____________.
14 699 C The bowl of a disk type centrifuge i The disk stack can be
maintain the balance of the bowl aft reassembled in any
and cleaned, which of the following sequence.
normal practice of re-assembling?

14 700 D On a diesel engine equipped with an speed will drop

"speed droop" control is reduced to tdrastically with any
_____________. increase in load
14 701 B The lower end of the piston rod, shown
piston pin
into the ________.
14 702 D The duration of fuel injection devel total pump stroke
helix fuel injection pump, is determined by the ____________.
14 703 A What could cause the bypass valve inClogged filter element
system to open?
14 704 A You are operating a main propulsiona piston about to seize
load when the jacket water temperature begins to rise. This could
be caused by ____________.
14 705 D Where the size and design of an engin
an additional pump is not
before starting is not necessary and required provided the
used, _____________. engine driven pump is
capable of producing
sufficient pressure
regardless of the
direction of rotation
14 706 A As shown in the illustration, which oThroughput too low
would be responsible for a "low pressure in oil outlet" alarm to be
indicated?
14 707 B When air is delivered under pressureinside diameter of the
air-bladder clutch, the ___________clutch gland increases
14 708 B The temperature of the contaminatedgreater
f than 212°F
shown in the illustration should be __________.
14 709 D The schematic diagram of an isochroflyweights (piece #8 and
shown in the illustration. If there is #9) move outward and
the speed will decrease, and the __ the pilot valve (piece
#10) moves upward
 14 710 D Wear occurring at the tips of the redusurface fatigue
the result of _____________.
14 711 C The diesel engine connecting rod show
marine-type rod
called a/an ____________.

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14 712 B The amount of fuel injected into a cylinder by a unit injector is
controlled by _____________.

14 713 C Before starting a diesel engine that has an engine driven lube oil
pump, the engineer should _____________.
14 714 B The port labeled "G" on the device shown in the illustration is
used to ____________.

14 715 B The principal purpose of refractory and insulation installed in the

firebox of an auxiliary boiler is to ____________.

14 716 B If an engine operates at 900 RPM at no load, and at 870 RPM at

full load, the speed droop is _____________.
14 718 A During the normal operation of the fuel oil centrifuge shown in the
illustration, the flow from the port labeled "B" should be
____________.
14 719 D When two medium speed diesel engines coupled in parallel to a
common propeller shaft that operates at the same speed as the
engines, which of the operating conditions listed will apply?
14 720 A Air bubbles in a hydraulic governor can cause _____________.
14 721 A The temperature of the contaminated fuel oil fed to the
centrifuge, shown in the illustration (203‚F) to no
greater than 100‚C (212‚F) in order _____________.
14 722 B The amount of fuel delivered for each cycle must be in
accordance with the engine load, and the same quantity of fuel
must be delivered to each cylinder for each power stroke at that
load. Which of the following statements describes this
requirement?

14 723 B In a diesel engine lube oil system, wCamshaft bearings

should be lubricated first?
14 724 A Fuel oil transfer systems used onboartwo fuel oil transfer
are required to have _____. pumps provided where
one is to be independent
 of the main engine

14 725 D Fins are installed on the fireside of decrease the velocity of

heat boilers, to ____________. gases flowing past the
tubes
14 726 D As shown in the illustration, which oThroughput too low.
would cause the "low pressure in oil outlet" alarm to be
illuminated?
14 727 A The port labeled "H" in the device shbleed off the opening
to _____________. water from the operating
slide

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14 728 C If a main propulsion diesel engine huadjust the idle speed
you should ____________. control

14 729 C Although slip in pneumatic clutches reducing high speed

modern pneumatic clutch arrangemen
torque vibrations
units are provided with an optional slip clutch which is used to an
advantage in _____________.
14 730 D A modern centrifuge, similar to the low drive motor RPM
illustration, is opened for periodic cleaning. The most common
cause of operating failure after reassembling, is due to
14 731 C At dead center, the centerline of the angularity of the piston
coincides with the _____________. motion
14 732 A The fuel injection pump shown in theeffective stroke
the plunger would give maximum ____________.
14 733 C The most crucial time for any bearing
during low loads
is _____________.
14 734 B Immediately after starting a diesel overloading in all
jacket water pressures are indicated cylinders
temperature continues to rise. If there is no change in the sea
temperature, you should suspect _________.
14 735 C In a simple hydraulic governor with power piston
pressure is maintained ready for use in the _____________.
14 736 D The hunting of a diesel engine may excessive speed droop
14 737 D Auxiliary boilers can be classified water-tube natural
circulation boilers
14 738 C In the illustration, If gear A has 72 t 275.88 RPM
C has 24 teeth and gear D has 36 teeth, what is the RPM of the
gear D if gear A is turning at 100 RPM?
14 739 A The greatest difference between the is self desludging
 illustration and that of a tubular bowl, with straight, vertical, interior
surfaces, is that the illustrated unit _____________.
14 740 B Fins are installed on the fireside of decrease the velocity of
heat boilers to ____________. gases flowing past the
tubes
14 741 D Connecting rods in a diesel engine a engine to the bed
_____________.
14 742 A The term "proper metering", as applie
delivering the same
system, can be best defined as ___ quantity of fuel to each
cylinder for each power
stroke according to
engine load
14 743 B The magnetic lock between the armatcontrolled engine speed
electromagnetic coupling is established by _____________.

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14 744 A The main propulsion diesel engine jaFaulty thermostatic
above normal, with the raw water sebypass valve.
tank water level being normal. Which of the following problems is
most likely the cause?
14 745 B When fuel oil heaters are required foeach heater shall have
____________. the capacity to supply the
main engine at full
power
14 746 C The component labeled "E" on the dseparating disk
illustration is the __________.
14 747 B As shown in the illustration, which oSteam supply pressure
would be responsible for a "low presslow.
indication?
14 748 B The rate of heat transfer in a water-t operating the boiler at
increased by ____________. less than normal water
level
14 749 D Which of the couplings listed will p Grid
transmitted to an engine?
14 750 D Governor hunting is caused by ___ governor undercontrol
14 751 C In a diesel engine, pistons are attach push rods
14 752 D Regarding jerk-type fuel pumps as udelivery valve spring
engines, the delivery cutoff point is controlled with a
14 753 A A diesel engine using lube oil with toincreased starting
_____________. difficulty in cold weather
14 754 B Some diesel engines are fitted with overloading of adjacent
water outlet from each cylinder. If cylinders
from an individual cylinder begins to rise, you should suspect
 14 755 D During the operation of the fuel oil gravity disk inside
illustration, liquid is passing contin diameter is too large
outlet, or the bowl is unintentionally "shooting". The probable
cause is the ____________.
14 756 B In the illustrated auxiliary diesel en decreasing the speed
distance between piece #6 and piece #10 will affect the engine by
14 758 A Large steam drums are not required in
steam and water are
auxiliary water-tube boiler because separated in the
accumulator
chamber)
14 759 B If the compensating needle valve of have a larger than
opened more than necessary the govnormal dead band

14 760 B The port labeled "D" in the device shthe light phase
for discharging ____________.
14 761 A Which construction detail is apparenThe piston is designed
piston assembly shown in the illustr with a heat dam.
14 762 A The plunger in a jerk pump is rotatedNo fuel will be delivered.
uncovered. If the port remains uncovered all of the time, which of
the listed operations will occur?

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14 763 B Immediately after any diesel engine icrankcase pressure
should check the ____________.
14 764 D One result of operating a diesel engidecrease in ignition lag
excessively low cooling water temperatures is a/an _______.
14 765 C Piping from booster pumps to injectio
schedule 60
14 766 C A "low pressure in oil outlet" alarm the proper setting of
illustration, may be caused by _____valve V4

14 767 A The speed droop characteristics of twEngine "A" will take a

driving two similar DC generators, agreater part of the load
the illustrated diagram, determine w than engine "B".
statements is true.
14 768 D The best method for determining thestraight edge laid across
offset misalignment between the discthe flange edges
coupling flange and the reduction gear output flange is by using a
_____________.
14 769 D While operating the fuel oil centrifugone or more of the
the bowl fails to open for sludge eje sludge ports is partially
that ______________. clogged
14 770 A Hydraulic couplings will transmit torslip between the impeller
 by means of energy changes in a rotat
and runner
vortices to form, there must be __________.
14 771 C In diesel engines designed with a cr reciprocating at the
piston rod can be described as ___ piston pin, rotary at the
crank pin
14 772 B Which of the following will occur wThe plunger immediately
spiral, on the plunger of a jerk pumpreverses direction.

14 773 B During the operation of the fuel oil gravity disk is too large
illustration, it is found that the "clean" oil discharge contains water.
The most probable cause is the ___________.
14 774 D If the jacket water temperature in anair binding of the engine
cooling system is lower than normal,cooling system
14 775 D Before any work is done on a burnerblock all control valves
auxiliary boiler, you should always ___________.
14 776 A If the a main propulsion diesel engi a sticking fuel control
with a jerking motion, a possible c linkage
14 777 C When reassembling the bowl of a disclockwise, due to the
locking ring is rotated ___________bowl rotating clockwise

14 778 A An engine is equipped with the oversp

increase compression on
shown in the illustration. The throw spring #12
at 900 RPM and trip out at 10% overspeed. However, the
overspeed trip is currently activating at 930 RPM. In order to
correct this problem, ____________.

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14 779 D Pitting in the area close to the pitch corrosion on the gears
each gear tooth of a reduction gear unit would be caused by
14 780 A There are two glands provided whereseal against scavenge
cylinder shown in the illustration. T air leakage
to ____________.
14 781 D Which of the components listed is o Exhaust valves
piston engine?
14 782 C In a jerk pump, the amount of fuel ththe pump supply
spray nozzle on each upward stroke pressure
_____________.
14 783 C To guarantee that a reduction gear belube oil temperature at
supply, you should check the _____ the cooler outlet
14 784 B If the coolant temperature is excessi water condensation in
the internally cooled fuel injectors, the fuel
by _____________.
14 785 D Valves and fittings used with diesel eare to be used on
 piping may be threaded in sizes up pressure lines in sizes 33
but screwed unions ________. mm O.D. and over

14 786 A If the regulating valve V4 shown in tLow pressure in oil

which of the following alarm conditioutlet.
program unit panel?
14 787 D Constant capacity, pressure atomizinautomatically supplied
meet a wide variation in steaming loawith warmer air on
_____________. demand
14 788 D Adjustments to the compensating neemaximum power at a
governor should be made with the e normal load

14 789 B Port "C" of the device shown in the ilheavy phase discharge
_________. port
14 790 C The fuel oil strainers located in the filter bag type
automatic auxiliary heating boiler are either the duplex type or the
14 791 D Which of the following design feature
The top ring is located as
of overheating the top compression riclose to the piston rim as
possible.
14 792 D In an electromagnetic slip coupling, reduces magnetic pull
caused by non-
concentric
electromagnets
14 793 C Which of the listed diesel engine op Exhaust temperature
checked immediately after any diesel engine is started?
14 794 B The component labeled "F" on the d dosing ring
illustration is known as the ____________.
14 795 B The boiler shown in the illustration two-pass, scotch marine
_______________.

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14 796 C Which of the following statements isAccurate alignment
hydraulic coupling? between the rotating
members is extremely
important.
14 797 C During extremely cold weather, while
high fuel oil viscosity
too slowly and fails to start. This problem is most likely the result
of ____________.
14 798 C When transmitted by a reduction gearremains the same
reduced and the torque available for work ______________.
14 799 B Which of the couplings listed is normFlexible disk-ring
usually replaced if completely dama coupling
14 800 B Excessive wear at part #11, shown inimproper timing
 in _____________.
14 801 B The purpose of a heat dam used in soconcentrate all heat in
pistons is to ____________. the piston crown

14 802 B Load control on a diesel engine is regulating the speed of

_____________. the turbocharger
14 803 D Immediately after starting a small h cooling water
should check the _____________. temperature
14 804 D Prolonged operation of a diesel engi increase power output
water system, at lower than normal designed operating
temperatures can _____________.
14 805 A Valves used in diesel engine fuel oil so constructed as to
_______________. permit packing under
pressure
14 806 B As shown in the illustration, which Vibration switch
be the cause for the "low pressure in activated.
illuminated?
14 807 A Regarding the water level electrode midway between arrows
illustration, normal water level woul"B" and "C"
14 808 A To increase the speed setting of the Increase the
illustration, which of the listed adj compression of the
speeder spring.
14 809 C The RPM of "A" is 100 and hobbed wi
61.11 RPM
"C", and "D" have 66, 22, and 48 teeth respectively, the RPM of
"D" in the gear train illustration is __________.
14 810 C Auxiliary boilers are divided into sevfire-tube controlled
which is _____________. circulation
14 811 C Which statement correctly applies toThe diagram shows a
barrel piston.

14 812 C Movement of the pump control rack changes

i the position of
using individual plunger-type pump the fuel inlet ports

14 813 B A diesel engine with a full speed of 0.3 to 1

at 300 RPM. What is the speed reduction ratio?

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14 814 A A faulty thermostatic bypass valve, iexcessive time required
system, can result in _____________for warming-up
14 815 C Which of the listed governor character
Sensitivity
load sharing relationship between paralleled diesel generators?
 14 816 B Auxiliary boilers are divided into sevwater-tube supercritical
which is ______________. circulation
14 817 B One of the most common causes of re
surface fatigue of the
wear caused by scoring as a result gears
14 818 A The purpose of the separating nozzledry steam from the
water-tube, coil-type, steam generatosteam and water mixture
14 819 A A direct acting, pneumatically contro13 millimeters
engine operates in a range of 10 to 50 psi. The fuel rack position
is at 20 millimeters when the governor air pressure is 30 psi. If the
governor air pressure changes to 20 psi, the fuel rack setting will
change to ______________.

14 820 A The major cause of trouble in a mechanical-hydraulic governor is

contamination of the hydraulic fluid _____________.
14 821 D Cast iron pistons used in large propulsion diesel engines are
constructed with ____________.

14 822 C The amount of fuel delivered by a unit injector is controlled by

the _____________.
14 823 A Which of the listed substances can be satisfactorily removed from
diesel fuel by centrifuging?
14 824 C An emergency diesel generator cooling system is equipped with
an automotive type thermostat. If the thermostat bellows loses its
charge, the thermostat will _____________.
14 825 B Which of the following statements is correct concerning ABS
rules for fuel oil injection systems as found on diesel propelled
vessels?

14 826 C Which of the following steps should be taken if the "high oil
temperature after preheater" LEDS, as shown in the illustration,
are illuminated?

14 827 A Downcomers installed on auxiliary package boilers are protected

from direct contact with hot gases by ___________.
14 828 D Pitted reduction gear teeth having a deep blue color with
evidence of overheating have been operated with __________.

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14 829 A Which of the listed problems will haThe fusible plugs will
a fire-tube type auxiliary boiler app melt.
 14 830 A Compensating needle valve adjustmen
running at normal
should be made with the engine __ operating temperature
without load
14 831 C The upper section of a piston is cal land
14 832 C The effective pump stroke of an indifuel delivery pressure
injection pump is determined by the ________________.
14 833 B A waterside fusible plug, installed inwould be located in the
_____________. center of the crown sheet
and inserted from the
fireside

14 834 C Which direction of rotation of the g I only

illustration will produce the correct direction of oil discharge to
operate the governor? I. clockwise II. counterclockwise
14 835 A Which of the following characteristicThe gear of larger
spur gears? diameter will rotate at a
slower RPM.

14 836 C A horizontal fire-tube package boilerthe rear of the boiler

design, is basically constructed wi being used as a
combustion chamber

14 837 B Engine displacement is equal to the area times the stroke

14 838 C When passing through mesh contact,galling

gear first go through a series of actions best described as
14 839 D The fusible plugs used in fire-tube aufurnace
the _____________.
14 840 D A main propulsion diesel engine is fi10 mm
actuated governor, having an operating range of 10 to 60 psig.
The current fuel rack setting is 15 mm at 30 psig. If the air
pressure to the governor is increased to 40 psig, the fuel rack
setting will change to __________.

14 841 A Why is the ring belt narrower in diamTo allow for greater
designed for a diesel engine? expansion due to higher
operating temperature.
14 842 A The amount of fuel delivered by a herotation of the pump
injection pump is controlled by __ plunger

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14 843 C Cooling water pumps driven by direct
curved impeller vane
are usually ____________. with tangential outlet
14 844 C If the operating element of a thermost
a low level in the engine
diesel engine cooling system malfunct
expansion tank
14 845 C In a diesel engine, excessive cylindeI only is correct
___________. I. increased blowby II. wear between the piston
ring and groove
14 846 A Part "M" of the device shown in the tiop or separating disk
to as the __________.
14 847 B In the past, the interior sides of mos allow a greater volume of
were straight. However. the interior sealing water to be
illustration, as compared to a straightcarried
designed to _____________.
14 848 D To correct a hunting problem in a maincrease the governor oil
hydraulic governor, you should ___ pressure
14 849 A The color of the engine exhaust fromclear
should be ______________.
14 850 A Which of the listed governor operatinZero speed droop
considered to be isochronous?
14 851 B The diameter of a piston is usually lefacilitate the installation
skirt, in order to ______________. of piston rings

14 852 A On a diesel engine equipped with indequalize effective

adjustments should be made to the tadelivery strokes
pumps to ____________.
14 853 C Which of the following manufactur Cold rolled
for diesel engine fuel injection line piping?
14 854 C The power output of a turbocharged tdurbocharger stalls
cooling water flow through the aftercooler is interrupted because
the _____________.
14 855 D Which of the following conditions wOverheating oil supply
temperature after preheater" alarm aspump.
to be indicated?
14 856 B A burned exhaust valve may be detecfiring pressure
____________.
14 857 C Helical reduction gears, as used witheliminate propeller shaft
are constructed so that several teeth end thrust
time to ____________.
14 858 C What occurs in the combustion spaceRapid increase in
shortly after ignition and before the temperature with
constant pressure.
14 859 D Successful combustion inside the cylifine atomization
dependent upon _____________.
14 860 C Which of the combustion parametersAtomization
l
engine, but NOT related to the injection system?
14 861 B An advantage of aluminum pistons, greater high temperature
pistons is _____________. strength
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14 862 B The control rack to a unit injector re altering spring tension on
_____________. the plunger
14 863 D The air bladder clutch used with somtwin-disk clutch plates
gears, consists of _____________.
14 864 C Which of the following conditions wiAir will enter the cooling
cooling water to a diesel engine is o system.

14 865 D Which of the listed conditions will oLoss of compression for

valve is leaking? that cylinder
14 866 B Fuel oil penetration into the cylinderdependent on air
_____________. turbulence

14 867 D Precombustion chambers, air cells, afiring pressure

speed, small bore diesel engines all serve to increase
14 868 B Some medium and high-speed dieselmust churn the oil in the
gear units to provide a useful propel sump
gears, the bull gear ____________.

14 869 B If the piston stroke in a diesel engin 1200 feet/minute

speed of rotation of the crankshaft is 720 RPM, what is the
average piston speed?
14 870 B Which of the following statements beThey are suitable for use
characteristics of an isochronous go on main propulsion units.

14 871 A Item #16 of the piston shown in the ilthrust plate or thrust
_____________. washer
14 872 C The fuel injection pumps on a dieselcamshaft
linkage system attached to the _____________.
14 873 C What type of fitting is to be used on Mild steel
line piping?
14 874 B Improper cooling of a diesel engine clow compression
accumulation of scale deposits, ma pressure

14 875 A Which of the following conditions wSteam supply pressure

temperature after preheater" alarm astoo low.
be illuminated?
14 876 A Diesel engine exhaust gas temperatuperformance
determine individual cylinder _____________.
14 877 D The volume of available air supply resize of the clutch
with the _____________.
 14 878 D The principal characteristic of an is slow the machine down
_____________. as the load is increased

14 879 D Which statement about diesel engineCombustion does not

begin until the piston
starts down on the
power stroke.

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14 880 D High velocity turbulence is impartedmasked intake valves
engine, shown in the illustration, by __________.
14 881 A Which of the listed design features Crosshead construction
stroke/cycle low-speed main propulsion diesel engines?
14 882 C Movement of the control rack of the fuel injection rate
illustration, changes the ____________.
14 883 D All of the diesel engine cylinder firi Excessively early
all of the exhaust temperatures are injection timing
situations is responsible for this condition?
14 884 B Keel coolers fouled with marine grow
higher raw water
_____________. temperatures
14 885 B Proper atomization of fuel in diese affect the injection
will _____________. pressure
14 886 A Modern marine diesel engines using amcombination of
operate on a combustion cycle whic constant volume and
constant pressure
14 887 C The function of the synchronizing mdrive the terminal shaft at
governor illustrated is to _________a set speed
14 888 A The purpose of the device illustrate take firing and
compression readings

14 889 B Governors used on diesel engines to a fixed maximum fuel

equipped with _____________. stop

14 890 A The ability of a fuel particle to tra penetration

before burning is called _____________.
14 891 D The piston shown in the illustration double-acting barrel
piston
14 892 A The effective stroke of a constant-strcontrol rack
pump is varied by the _____________.
14 893 B The pinion gear shown in the illustranearest #1
_____________.
14 894 A Insufficient piston cooling for a lar high temperature
diesel engine burning heavy fuels, corrosion and burning off
 of piston crown metal
14 895 B A piston in a four-stroke/cycle diese crankshaft revolution
during each __________.
14 896 B The purpose of the ball-head unit shotransmit fly weight
governor is to _________. movement to the floating
lever
14 897 A Which of the operating functions listThe clutch glands are
glands of the unit shown in the illustfitted with friction blocks.

14 898 A In the pressure-volume diagram shown

c
injection occurs at point ___________.

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14 899 A The component labeled "O" on the dsliding bowl bottom
illustration is called the ____________.
14 900 A The diesel engine valve subjected tocylinder exhaust valve
service is the ____________.
14 901 B The lower section of a piston is cal land
14 902 A The function of the window cast intoallow the pump to be
jerk pump is to ____________. timed to the engine

14 903 D Which of the following conditions isThe purifier must be

containing moisture is continuously foperated at a higher
clarifier? temperature.
14 904 C Scale and dirt accumulation in the waTBN number
will be indicated by a gradual increase in the lube oil
14 905 D Which of the following statements isThe piping shall be so
fuel injection piping used on diesel arranged to allow for
of 250 mm and above? uncomplicated removal
of the fuel injection
equipment and other
associated components
located on the cylinder
head.
14 906 B Which of the following conditions wImproper steam trap
cause for the "low oil temperature a selection.
as shown in the illustration, to be illuminated?
14 907 B A change in the degree of fuel atomizair turbulence
would most greatly affect _____________.
14 908 C Which of the following devices is a Power piston
nearly all mechanical governors?
14 909 D Theoretical perfect combustion in a aldehydes and carbon
 products of _____________. dioxide
14 910 C Gear-type flexible couplings are ofterequire no lubrication
trains because they _____________.under normal operating
conditions
14 911 B The piston pin shown in the illustratifixed
_________.
14 912 B In order to determine the fuel pump rsecure the engine and
pumps on the diesel engine shown inremove the fuel pump
________. crosshead cover

14 913 C In a bypass type lubrication system fo

lube oil pump suction line
oil line to the centrifuge should be taken from the
14 914 C Which of the following factors tendsBaffle plates that have
on the saltwater side of a heat excha been bent during prior
cooling water system? removal.

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14 915 A If the peak to peak pressure pulsationThe piping shall be
injection return piping exceeds 285 pshielded and secured to
be provided? prevent fuel or fuel mist
from reaching a source
of ignition on the engine
or its surroundings.

14 916 D Which of the following conditions wInsufficient tighting of

alarm "emergency stopping or vibratilock ring.
to illuminate?
14 917 D Diesel engine exhaust temperatures leaking exhaust valves
14 918 A In a diesel engine, a leaking exhaust misfiring
14 919 D Which of the following statements reIf the governor spring
operating sequence of events applied(piece #7) breaks, the
engine governor shown in the illustr engine will dangerously
overspeed.

14 920 C When used with reversing reductionmaintain alignment when

engines should be bolted to their founthe ship's hull is working
the drive end and clearance (loosely ifn heavy seas
locations. This is done to _____________.
 14 921 C The piston wrist pin used in some diepiston relief groove
prevented from contacting the cylinder wall by a __________.
14 922 C In a diesel engine mechanical-type f push rod action
valve is opened by ____________.
14 923 D What is the term given to the processSettling
very fine particles for better combustion?
14 924 D The most severe cavitation erosion othroughout the lower one-throughout the upper one
diesel engine wet cylinder liners n half of the liner
14 925 A Which of the coupling types listed isSolid flange

14 926 B For a given fuel, a change in the comAn increase in

ignition lag by which of the listed m compression ratio will
increase the ignition lag.
14 927 B Turbulence in a diesel engine cylindeproper fuel metering
providing _____________.
14 928 B In the reduction gear set, shown in th 1
shaft is located at #________.
14 929 B The required amount in the change ospeed droop
governor will make a corrective movement is known as

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14 930 B Which of the following problems may
The amount of fuel
pressure of a fuel injection nozzle is injected will be
the engine manufacturer? increased.
14 931 A In a full floating wristpin, the pin i snap rings
the cylinder walls by _____________.
14 932 A Exhaust valve grooving and corrosion
vanadium
components of residual fuel oil. These components are sodium,
sulfur, and _____________.
14 933 B Whether using a centrifuge or a simpl
high temperature and a
filtration will be the most effective whigh viscosity
14 934 C Cavitation erosion in the cooling watfuel nozzle holders
usually occurs at the pump impeller, and on the waterside of the
14 935 C High firing pressures and a low exhadecreased piston to
engine may result from __________cylinder head clearance
14 936 B Poor combustion in a diesel engine high compression
______________. pressure
14 937 B After each speed change, the compres
speed droop governing
governor speeder spring is returned to a constant value,
regardless of the amount of movement of the fuel control
mechanism and engine load. Hence, this results in
 14 938 B Fuel oil discharged to the diesel engine cylinder is atomized at
the _____________.
14 939 D The longer the ignition delay period occurs in a diesel engine, the
_____________.

14 940 A The load is always placed on the lower half of the main bearings
in a/an ____________.
14 941 B Which term describes piston pins having bearing surfaces in both
the piston bosses and connecting rod eye?
14 942 B Diesel engine fuel oil leakage should be drained and additional
precautions provided to __________.

14 943 C As shown in the illustration, the alarm indicated by "emergency

stopping or vibrations" may be caus __________.

14 944 C The easiest way to locate a defective diesel engine exhaust

valves is by _____________.
14 945 D Which of the following devices is common to both mechanical and
hydraulic governors?

14 946 B Which of the following conditions will tend to increase the ignition
delay period of combustion in a compression ignition engine?
14 947 B In the reversing reduction gear shown in the illustration, the
forward and reverse main pinions are in constant mesh with the
main gear. This means the ____________.

14 948 A A flexible coupling is located between the _____________.

worm gear

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14 949 B Exhaust pyrometer readings provide effectiveness
a of water-
_____________. cooled exhaust elbows

14 950 B When is fuel injected into a cylinderBefore air in the cylinder

is compressed.

14 951 D Part #15 of the piston shown in the ilheat dam

____________.
14 952 C Injection lag can be caused by ___ improper timing of the
intake valves
14 953 B To manually bypass a strainer or filtefirst, parallel the drain
filtering system, _____________. lines
 14 954 B If the raw water supply pressure for broken thermostat
system is below normal, you should check for a ____________.
14 955 D A change in the degree of fuel atomizcylinder air turbulence
cylinder has the greatest effect on the ____________.
14 956 C In most marine single reduction gearquill shaft
by the _____________.
14 957 D The rate of pressure rise during the percent of CO2
process in a diesel engine, is influenced chiefly by the
14 958 A A change in engine speed is requiredgovernor sensitivity
make a corrective movement of fuel rack. This aspect of
governing is commonly expressed as a percent and is known as
14 959 A On most diesel engines, the governorcontrolling the amount of
by _____________. fuel injected into the
cylinders
14 960 D Proper dispersion of fuel in a diesel injection pressure
upon the _____________.
14 961 B Piston cooling fins are located ___ on top of the piston
crown
14 962 A Compared to other fuel injection systinjection lag
with virtually no _____________.
14 963 A When cleaning a duplex strainer, it i the pressure to be bled
_____________. prior to opening the
compartment cover
14 964 D In a closed cooling water system, w An open vent in the
can cause the water pressure to fluctcooling system.
14 965 A If uneven sludge deposits accumulatean alarm for "emergency
bowl assembly of the device shown in
stopping or vibrations"
may be indicated

14 967 A Why is it necessary to compress the aTo ignite the fuel.

a diesel engine?
minimum.

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14 968 C The average exhaust temperature of tawo-stroke/cycle diesel
engine with a turbine-driven superchengines have a higher
four-stroke/cycle diesel engine at eq M.E.P. than four-
____________. stroke/cycle diesel
engines

14 969 C Diesel fuel oil having a low cetane raimproved cold weather
_____________. starting
14 970 A Clutching takes place nearest the bearing shown in the
 illustration, located at #_____.
14 971 B Besides the use of piston cooling finsskirt
also provide extra strength for the piston ___________.
14 972 B Differential needle valves used in fuecam action
by _____________.
14 973 D A dirty lube oil strainer can result crankcase dilution

14 974 A In a closed cooling system for a turbimproper venting of the

diesel engine, fluctuating water pre cooling system
________________.
14 975 D In the set of reduction gears shown inBall
bearing is used?
14 976 C The governor controlling a diesel enintake air supply
RPM by adjusting the _____________.
14 977 A High exhaust temperature and black engine overload
auxiliary diesel engine can be caused by _____________.
14 978 C Individual cylinder performance in achemical analysis
determined by exhaust gas _____________.
14 979 A Any increase in the exhaust back pres
reduce engine
diesel engine will _____________. horsepower output
14 980 D The driving force of a propeller is tr bevel gear teeth
the_____________.
14 981 C The purpose of the drilled passages iprovide cooling for the
shown in item "S" the illustration i piston

14 982 A If fuel injection to a four-stroke/cyc cylinder compression

than designed, ignition may be delaypressure may not be
____________. high enough
14 983 A In a full flow type lube oil system, tha clogged filter element
due to _____________.
14 984 B Which of the following problems canDefective temperature
in the closed cooling system of a macontrols in the system.
14 985 C Which of the following statements isEach engine must have
engine cooling water systems? its own engine driven
cooling water pump
capable of providing
cooling for all ranges of
operation.
cylinder.

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14 986 B Which of the following conditions will occur if the height position
of the paring disc or bowl spindle is incorrect in the device shown
 in the illustration?

14 987 C Sensitivity for a diesel engine governor is described as the

_____________.

14 988 B Which of the following statements concerning the factors affecting

ignition delay is correct?

14 989 C Air motion is induced in a four-stroke/cycle diesel engine cylinder

to improve air fuel mixing, and is known as _____________.
14 990 B Maintaining the proper fuel oil temperature will result in
_____________.
14 991 B Trunk type diesel engine pistons are effectively cooled when heat
is ____________.
14 992 B The minimum fuel oil delivery pressure required for efficient
injection depends primarily on the ______________.

14 993 B An increased pressure differential between the inlet and outlet of

a strainer usually indicates the strain_____________.
14 994 B A diesel engine with a combustion chamber located between the
crowns of two pistons is known as a/an _______________.
14 995 C In a diesel engine, crosshatch on the liner surface aids in
___________. I. rapid ring seating II. the retention of lube oil
14 996 B Persistent knocking in one cylinder of an eight cylinder diesel
engine would MOST likely be caused by _____________.
14 997 D To successfully reduce an excessively high diesel engine exhaust
gas temperature, you should _____________.

14 998 A Which of the two events listed occurs simultaneously in a two-

stroke/cycle diesel engine?
14 999 C High exhaust back pressure will result in an increase in
______________.
14 1000 B The governor for an emergency diesel generator is shown in the
illustration. A large change in load will result in a change in engine
speed, which of the parts listed will be the FIRST governor
component to react to the change in load?

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14 1001 B A loop or cross scavenged engine utilMasked intake ports
and a turbocharger to provide scavenging air. Which of the listed
 mechanical designs prevents the air under the pistons from being
pumped back through the scavenge ports during the piston power
stroke?
14 1002 C Which of the following statements coThe hole type of a closed
injection nozzle is true? nozzle is self-cleaning.

14 1003 D To determine if the lube oil filter e open the filter and
________________. inspect the elements
14 1004 B Combustion gas venting through theleaking oil cooler
caused by a _____________.
14 1005 B Diesel engine control can be obtaineat any time
_____________.

14 1006 C The direct cause of a crankcase exploextremely hot scavenge

______________. air
14 1007 D Which of the following statements isAn alarm device with
installation of diesel engine cooling audible and visible
signals is required for all
cooling water systems.

14 1008 D If the separator shown in the illustra The bowl spindle is bent.
alarm indicating "emergency stopping or vibrations" will be
illuminated. Which of the following conditions may cause this
situation?
14 1009 D If the instrument sensing element, sho
Immediate damage to
became coated with foreign matter, wthe porcelain insulator.
would be likely to occur?
14 1010 C Combustion knock can occur in the cy
a shortened ignition
under any condition permitting ___ delay period
14 1011 C One of the most common methods innon-floating pin
piston pin from contacting the cylinder wall is by the use of
14 1012 D The injection pressure of a hydraulicincreasing fuel oil
increased by _____________. booster pump pressure
14 1013 A Many lube oil filters have pressure gslowly increase
inlet and outlet in order to indicate the pressure drop across the
filter. In normal operation, the pressure drop will _____________.
14 1014 C A cracked cylinder head on a diesel excessive lube oil
_____________. consumption

14 1015 B Control of the main propulsion diesewheelhouse control

the engine room to the wheelhouse station

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14 1016 B The possibility of a diesel engine cr with a crankcase vacuum
increased by operating an engine _ between 1.5" and 2" of
water

14 1017 A Exhaust pipes of multiple engine instunless arranged to

interconnected, but are to be run sepprevent the return of
_______. gases to an idle engine
14 1018 C If the control unit as shown in the il that the operating water
"abnormal water content", the operattank is about to overflow
___________.

14 1019 C Excessive diesel engine cylinder exhslight timing

caused by _____________. discrepancies
14 1020 A A thrust bearing is used with a propucontrol axial movement
_____________. of the crankshaft

14 1021 C In a large slow-speed propulsion diesagainst the crosshead

to the piston is ______________. during power stroke and
away from the crosshead
during the compression
stroke
14 1022 D Fuel supplied by each unit injector ohigh pressure fuel line
acting diesel engine is directed into each cylinder at a very high
pressure through the ____________.
14 1023 C Turbulence of the compressed air chaignition lag
cylinder increases _____________.
14 1024 B A cracked cylinder head in an operata steady flow of water
by _____________. from the expansion tank
vent
14 1025 D Combustion knock occurring in a dieexcessive fuel
_____________. penetration
14 1026 D Which of the following problems couReduced lubrication
accumulation of oil vapors in the crankcase of a diesel engine?
14 1027 B Which of the following statements isThe mechanics of engine
combustion cycle? operation.

14 1028 D The time between injection and ignitturbulence lag

14 1029 D In using reduction gears to obtain effthey must be located at
____________. the after end of the
engine
14 1030 C The purpose of the rotating seal locatprovide lube oil to the
reversing reduction gear shown in thegears
_____________.

14 1031 A During the power stroke, the side thru

formed by the connecting
result of the angle ____________. rod and the cylinder
center line

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14 1032 D One problem resulting from a diesel start of injection will
pressure being lower than specified always be retarded
is that the _____________.
14 1033 B Lube oil cannot be efficiently filter viscosity is too low

14 1034 D A crack in a cylinder liner can be worn piston rings

14 1035 B An exhaust pipe from a internal co installed on fishing

to be insulated when _________. vessels
14 1036 A When oil vapor, oxygen and hot spots
Explosion
time within a crankcase, which of the following hazards could
develop?
14 1037 A Which of the following conditions ma
Water content in oil feed
"drain valve insufficient" being indicextremely high.
device shown in the illustration?
14 1038 C For a given size engine, the two-stroit has a longer power
deliver more power than a four-strokstroke
because ____________.
14 1039 D A sudden drop in diesel engine cyli a leaking fuel injector
can be caused by ____________. nozzle
14 1040 D The governor for an auxiliary diesel "1"
illustration. Which of the pieces listed rotates proportionally to
engine speed?
14 1041 A Ring groove inserts are occasionall reduce the ring groove
pistons to ____________. wear rate

14 1042 D The minimum speed an engine must the

at type and size of the
occur depends upon __________. engine
14 1043 A Lube oil filters remove contaminantsheated to reduce
the oil being filtered is __________ viscosity
14 1044 D Coolant can be lost from a diesel engcylinder head cracks
system by leakage from _____________.
14 1045 C An automated diesel engine should low lube oil temperature
_____________.
14 1046 B Which of the listed conditions is mosA high cooling water
explosion? temperature
14 1047 C Which of the following statements peThere shall be a means
with bores exceeding 200 mm? to display the cooling
water outlet temperature
 of each cylinder.

14 1048 D Which of the following conditions caBack pressure oil outlet

unit of the separator shown in the ill is too high.
A06?
14 1049 C A V-12 four-stroke/cycle 500 horsepFuel pump rack setting is
operating under a normal load, the f too far out.
the exhaust temperatures are high. Which of the following
problems is the most probable cause of this condition?

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14 1050 D An overcorrecting and unstable engine governor operation is
known as ____________.
14 1051 C What is the function of an engine's stationary parts?

14 1052 C Proper filtering and straining of diesel fuel is important because

the _____________.

14 1053 C Lube oil filters remove contaminants more efficiently if the oil
being filtered is _____________.
14 1054 B Increasing the oil pressure acting on the power piston of the
hydraulic governor shown in the illus____________.
14 1055 D Diesel engine automated control systems may utilize sensing
devices of dual function, with sensing ranges providing both alarm
and engine shut down capability. Which of the key points listed
would only require an alarm sensor?
14 1056 D Crankcase explosions in propulsion diesel engines result from
_____________.

14 1057 A Which of the combustion chambers shown in the illustration is

referred to as an "energy cell" used in some small diesel
engines?
14 1058 A Combustion knock occurring in a diesel engine can be caused by
________________.
14 1059 C Which of the items listed causes a direct acting mechanical
governor to operate the engine fuel control linkage?
14 1060 A The diesel engine shown in the illustration can be fitted with a
pyrometer at each exhaust elbow. If one of the cylinder
pyrometers is reading significantly higher than the others, which
of the following should be your FIRST action?
14 1061 A Thin bronze rings are inserted in the face of some chromium
plated piston rings to _____________.
 14 1062 D The two strokes of a two-stroke/cycle diesel engine are
____________.
14 1063 B Reduction gear casings are vented in order to _____________.

14 1064 B Which of the conditions listed may occur in an operating diesel

engine if air pockets form within the cylinder head circulating
water passages?
14 1065 D Air receivers installed in starting air systems are to be ________.

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14 1066 B Critical speed in diesel engines occ opposed to the
pulsations become _____________. crankshaft rocking
couple
14 1067 B If the main sealing ring in the bowl AO1: abnormal water
which alarm will be indicated by thecontent.
shown in the illustration?
14 1068 C In the Otto cycle, the fuel/air mixtur At TDC by heat
by what means? generated by
compression.
14 1069 B Which of the listed reasons is the moMissing filter segment of
drop in compression pressure in one an intake filter
14 1070 B What is the function of the main thr Prevents lateral
movement of the slow
speed gear.
14 1071 A Which of the construction techniquesSpecial ring facings,
rings to facilitate run-in or seating? such as a thin bearing
surface of antifriction
metal.

14 1072 B Heat damage to fuel injection nozzl excessive fuel oil

avoiding _____________. temperature

14 1073 C How is the illustrated strainer elem The drain plug is

operation? removed and the
housing is drained.

14 1074 D Failure to ensure proper venting of t excessive air charge

 engine can result in ____________. density
14 1075 D In a diesel engine, the time period b injection duration
ignition is usually defined as _____________.
14 1076 B Failure to open the diesel engine testan air bound fuel system
shutdown, prior to starting may result in _______.
14 1077 D The knock occurring when a cold dies
caused by retarded
continues while running at low speedinjection timing
reaches normal operating speed and temperature, is
14 1078 A When the diesel engine hydraulic goThe edges register with
illustration is operating at controlle and just close off the
relationships listed will occur betweeports without allowing oil
and the ports of the pilot valve bush flow.

14 1079 C If a diesel engine's exhaust temperat too light of a load

cause could be ____________.
14 1080 B The ability of the governor to prevensensitivity
is termed _____________.

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14 1081 B In a simple mechanical governor, t centrifugal force rotates
the ball-head

14 1082 C To minimize the formation of carbonavoid using liquid-cooled

nozzles, you should _____________nozzles whenever
possible
14 1083 B The metal-edge strainer, shown in theAs sludge and dirt
medium-speed diesel engine reduction
accumulate on the outer
Which of the following statements cosurface of the strainer
strainer? discs, the effectiveness
of the strainer increases.

14 1084 B If the water level dropped rapidly in loss of suction in the

closed diesel engine cooling water s circulating pump
14 1085 A Each receiver in a starting air syste is to be provided with a
a relief valve _______________. suitable fusible plug to
relieve the pressure in
case of fire
14 1086 B The intake air ducting to a diesel e flammable vapors will
area on deck where flammable vapors
accelerate corrosion of
present, because ____________. the turbocharger

14 1087 A If the air supply to the "liquid senso AO6: liquid indication.
 illustration is secured accidently, which of the following alarms will
be indicated?
14 1088 C How is oil supplied to the device shoAn attached positive
displacement pump
supplies oil to the
separator.

14 1089 D Which of the following statements deThe main gear is located

the drive system shown in the illustr directly under the main
input pinion shaft.
14 1090 C A gear type flexible coupling is precireduced torsional
_____________. vibration and resonance

14 1091 B A diesel engine piston ring face is intop of the ring groove
14 1092 D Injectors for use with heavy fuel oil prevent heat corrosion to
water or light oil to _____________.internal components
14 1093 B The device labeled "A" shown in theprecombustion chamber
____________.
14 1094 B Which of the following conditions caExcessive valve train
the cooling system of a diesel engin lubrication.

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14 1095 B Which of the types of reduction gearin
Hypoid
medium speed main propulsion units?
14 1096 D When a nozzle tester is used to checkthe valve should pop at
injection nozzle, _____________. 1/2 the actual set
pressure

14 1097 B Vessels having main engines arranged

one automatic drain
provided with at least _________. serving both containers

14 1098 A Kingsbury thrust bearings are lubri flooding the thrust

bearing assembly with oil

14 1099 C Fuel is ignited in a diesel engine c a spark plug

14 1100 B In a diesel engine, the time taken to hinjection lag

them into vapor, and bring about combustion is called
14 1101 C The function of diesel engine piston prevent piston side thrust
____________.
 14 1102 B If the coolant temperature is too lowwater condensation in
internally cooled fuel injectors, the the fuel
14 1103 B A directly connected or geared main constant speed governor
should be fitted with a/an ____________.
14 1104 B In order for the governor shown in the
pilot valve initially moves
the increase in load placed on the goup
____________.

14 1105 D Which characteristic of the Otto cyclNo pressure increase

cycle but NOT in the theoretical diesduring combustion.
14 1106 D The principal hazard to personnel whe
electrical shock
in use is _____________.
14 1107 D A possible cause for an individual early fuel injection
on a slow-speed, two-stroke/cycle main propulsion diesel engine
could be due to ____________.
14 1108 D Which of the bearing types listed i Ball bearings
smaller vessel main propulsion reduction gears as thrust
bearings?
14 1109 A A diesel engine is operating with ex reduce the engine load
temperatures at all cylinders. To correct this condition, you should
FIRST _____________.
14 1110 A Excessive diesel engine back pressurcarbon buildup in the
__________. exhaust manifold
14 1111 C The main reason for using bimetallicincrease engine thermal
______________. efficiency
14 1112 A In order to start a large, low-speed, fuel must be preheated
on high viscosity fuel after an extended shutdown, the
____________.
normal

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14 1113 D A spring-loaded centrifugal flyweig pilot valve oil pressure
reduced engine load with an immediate increase in _________.
14 1114 B Lube oil accumulating in the coolinglube cooler failure
engine will result in _____________.
14 1115 D The exhaust gas temperature prior toan exhaust valve leak
of the system shown in the illustration, is 100°-150° (37.8°-
65.5°C) higher than the individual cylinder temperatures. This
indicates _____________.
14 1116 B A fuel leak occurs in the high pressuhigh cost of fuel
injection pump and fuel nozzle. This requires immediate repair
because of the _____________.
 14 1117 D The device used to limit engine torq speed limiting governor
is called a ______________.
14 1118 D Which of the following precautions sMake sure the separator
starting the separator shown in the ilis properly assembled.

14 1119 B Which of the speeder springs listed iSpiral

governor installed on an engine operating over a wide speed
range?
14 1120 B In a diesel engine, internal combusti the simple admission of
moved by _____________. fuel and air into the
combustion space only
14 1121 D A secondary function of diesel engine
reduce friction losses in
_____________. the engine

14 1122 A When a nozzle tester is being used todistorted spray pattern

injection nozzle, a clogged nozzle orifice will be indicated by a
14 1123 D Where engine bores exceed 230 mm,at the supply inlet to the
arrester is to be fitted ___________. control air manifold for
non- reversing engines

14 1124 D Engine coolant accumulating in the dlow oil pressure

can result from a _____________.
14 1125 D Once the separator shown in the illusFeel the machine for its
which of the following procedures s tendency to vibrate.

14 1127 B Persistent knocking of one cylinder olow loading of that

when the fuel supply to that cylinde cylinder
be a result of ______________.
14 1128 A In a Kingsbury thrust bearing, the t pivoted, and the thrust
collar turns with the shaft

14 1129 B The purpose of the energy cell, or aircause autoignition in the

cell rather than in the
main combustion
chamber
14 1130 D Which of the listed components willCollar
pressure on the thrust shoes of a Kingsbury thrust bearing?

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14 1131 B Barrel face, taper face, grooved, andpistons
of diesel engine _____________.
14 1132 D You are testing a non-popping closednozzle orifices are too
 nozzle tester. A pressure slightly le small
pressure is applied. If no fuel appears at the spray tip, the
14 1133 C Diesel engines are classified as recipuse energy from fuel
combustion engines because they _ burned outside their
cylinders

14 1134 A When more than one propulsion diese

single reduction
single propeller shaft through reduction gears, the gears are
usually _____________.
14 1135 A The initial reaction of the governor fThe floating lever moves
load, shown in the illustration, is be up at the speeder rod
following statements. end.
14 1136 C A main propulsion diesel engine is shutting off the air supply
_____________.
14 1137 B Which of the following statements isThe dial type adjusting
operating function of the governor shknob (B) is used for
setting speed droop and
damping out hunting.

14 1138 D The efficient burning of fuel in a di temperature of

the _____________. compression
14 1139 C What type of reduction gear would Single reduction,
twin medium-speed propulsion dieselplanetary
shaft?
14 1140 A Which of the equal horsepower diesel
A four-stroke/cycle "V"
the same speed, is least affected by type engine
14 1141 D Diesel engine piston ring gaps can beallows piston ring
comparison, the angle cut ring ___ expansion
14 1142 A The total air capacity for non-revers six consecutive starts
sufficient for _______.
14 1143 B To properly clean the disks of a metaremove the disks and
diesel engine lube oil system, you soak them in kerosene
14 1144 D Prior to starting the device shown in renew the nylon bowl
should _________. seal
14 1146 D What is the best way of stopping an Disconnect the battery
cables from the starting
motor.
14 1147 D The thermal energy produced by an icombustion energy
transformed into ______________.
14 1148 C One remedy for a high firing pressure
increase scavenge air
exhaust temperature in one cylinder opressure

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14 1149 D The most rapid period of fuel combustion in a diesel engine
cylinder should begin just before the piston reaches top dead
center and ____________.

14 1150 A The sealing surfaces of a diesel engine piston ring are

considered to be the faces in contact with the cylinder wall, in
addition to the ring groove ___________.
14 1151 A The blower type crankcase ventilation system ____________.

14 1152 D One cylinder of a diesel engine is persistently knocking and does

not cease when the fuel supply to that cylinder is secured. Which
of the following problems may be the cause?
14 1153 D Routine monitoring of a diesel engine should include
_____________.
14 1154 A If a diesel engine is difficult to start and operates with the engine
temperatures lower than normal, you should suspect that the
14 1155 D Which of the listed designs is effectively used to provide the
turbulence necessary for proper combustion in a diesel engine
cylinder?
14 1156 B The overspeed trip installed on most diesel engines will stop the
engine by shutting off the ____________.
14 1157 B Which of the engine firing orders is listed for the diesel engine
shown in the illustration?
14 1158 B The pressure-volume diagrams illustrated are of four internal
combustion engine cycles. Which one represents the ideal diesel
cycle?
14 1159 B Improper seating of an air starting check valve in an operating
diesel engine is indicated by _____________.

14 1160 D White smoke exhausting from a diesel engine can result from
____________.
14 1161 C The reason some two-stroke/cycle, diesel engine piston rings are
pinned to prevent rotation, is _____________.

14 1162 D A distorted spray pattern from a fuel injector can cause

_____________.
14 1163 A Black smoke exhausting from an operating diesel engine can be
caused by _____________.
14 1164 B A six cylinder, single acting, four-stroke/cycle diesel engine has a
bore of 10 1/2 inches(26.6 cm), and a stroke of one foot(30.5 cm),
producing 75 HP (5.6 kw) per cylinder at 720 RPM. What is the
mean effective pressure for the stated conditions?
14 1165 C In the pressure-volume diagram shown in the illustration, the
atmospheric pressure line is indicate_____________.
14 1166 B A device which functions to bring a diesel engine to a full stop to
protect it from damage is known as a/an ___________.
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14 1167 B If control air systems are supplied fr to provide for intermittent
capacity of the receivers should be starting procedures

14 1168 A Which of the following statements reTiming of injection does

precombustion chamber used in an au
not need to be exact.

14 1169 D When would the available energy of During operation at low

stroke/cycle diesel engine be insuffi speed
turbocharger, resulting in the incorrect amount of air for
combustion?
14 1170 D Which of the following statements wThe valve is
the valve clearance of the unit shownmechanically adjusted at
point "D".
14 1171 D Oil control rings are designed with sdecrease ring contact
_____________. area and cut down heat
transfer
14 1172 B What is the average piston speed of 645 ft/min (196 m/min)
engine with a bore of 29.5 inches (75 cm), a stroke of 63 inches
(160 cm), and a rated speed of 123 RPM?
14 1173 C To routinely clean a metal-edge typeremove the disc element
_____________. and immerse it in
gasoline
14 1174 B Broken intake valve springs on one coverspeed
can cause the engine to _____________.
14 1175 D One advantage obtained from the us increased engine thermal
chamber in a diesel engine is ____ efficiency
14 1176 B Electrically operated safety devices increasing the volume of
function to stop the engine by ____ intake air
14 1178 B The compression ratio of a diesel engpiston area to connecting
between the _______________. rod length

14 1179 D A pilot-operated, main air starting v an increase in the

cylinder while the engine is operatinexhaust temperature
indicated by ____________. reading for that cylinder
14 1180 A White smoke exhausting from an opea cracked liner
indicate _____________.
14 1181 D Which of the lettered items, shown inA
oil control ring?
14 1182 A When the opening pressure of a diesel
quantity of fuel injected is
 than that specified by the engine mandecreased
14 1183 C The metal edge type filters used in dback flushing the system
oil systems are normally cleaned in and draining the filter

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14 1184 D The device represented by the symbol "B" in the illustration is
used to _____________.

14 1185 D The device labeled "E", shown in the illustration, is properly

identified as the _____________________.
14 1186 D If the main engine of an unattended engine room shuts down
automatically, it will be indicated by an alarm ___________.
14 1187 A Increasing the exhaust valve tappet clearance of a diesel engine
will result in the exhaust valve opening __________.
14 1188 B White smoke issuing from the exhaust of an auxiliary diesel
engine could mean _____________.
14 1189 A In the diagram shown in the illustration, which segment of the
cycle represents compression?
14 1190 D Precombustion chambers differ from turbulence chambers in that
precombustion chambers _____________.

14 1191 D Oil control rings function to _____________.

14 1192 C What may be used to protect starting air mains against

explosions arising from improperly functioning starting valves?

14 1193 B Before starting the device shown in the illustration, the operator
should always check the ________.
14 1194 A Which of the following statements identifies the purpose of the
valve bridge shown in the illustration?

14 1195 D In diesel engines, the four basic events (intake, compression,

power and exhaust) are performed once in _______________.

14 1196 D Engine protection by means of an alarm or shutdown control can

be obtained with devices that are sen_____________.
14 1197 A A propulsion engine, using the speed control circuit shown in the
illustration, fails to function at speeds lower than the low end of
 the critical speed range. Which of the following statements
describes what should be done to correct this malfunction?

14 1198 B From the engine data shown in the illustration, what would be the
average piston speed if the engine were turning 400 RPM?

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14 1199 A If a diesel engine fails to start, one olow compression
_____________. temperature
14 1200 B Maximum horsepower of a diesel eng
when the engine RPM is
____________. pulled down by overload

14 1201 B The main purpose of the piston oil scseal the space between
_____________. the piston and the liner

14 1202 A What is commonly used to create turShape of the piston

combustion system? crowns.
14 1203 C A "Blotter test" is performed on the lpercent of fuel dilution of
determine the _________. lube oil
14 1204 B What causes diesel fuel to be ignitedSpark plug
operating diesel engine?
14 1205 B If a hydraulic starting motor turns, bexcessive viscosity in the
the most likely cause is __________hydraulic fluid
14 1206 A White smoke exhausting from a dieslow combustion
_____________. temperature
14 1207 C The highest pressure in a diesel eng at TDC
14 1208 D How many power strokes per cranksha
One
eight cylinder, two-stroke/cycle diesel engine?
14 1209 C A smoking exhaust from an operatinglow sulfur content in the
caused by ______________. fuel
14 1210 A The purpose of compressing the air w
produce the heat for
engine is to __________. ignition
14 1211 C The primary purpose of oil control riprovide a reservoir for
is to _____________. cylinder lubrication

14 1212 A Which of the fuel nozzles listed re Pintle

maintenance?
14 1213 A Diesel engine lube oil diluted with fudecreased viscosity
14 1214 A At the point in time indicated by the intake stroke
illustration, the #3 piston is on the _____________.
 14 1215 B The indicator card shown in the illusoscillating drum
____________.
14 1216 C To shut down a diesel engine after i Speed limiting governor
speed, which type of device listed should be used?
14 1217 A Opposed piston diesel engines are c two-stroke/cycle single
acting
14 1218 B The most important factor in engine indicated horsepower
power output at the end of the crankshaft available for doing work.
This is known as _____________.
14 1219 D In describing basic diesel engine opethe production of high
refers to _____________. pressure gases

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14 1220 C The valve gear shown in the illustrati90°
medium speed, diesel engine, with fuel injection commencing in
at 10° BTDC. Approximately how many crankshaft degrees from
the point at which fuel injection begins, does the exhaust valve
push rod begin to move up?
14 1221 C Oil control rings used in two-stroke/increase the liner area
located near the bottom of the pistoncovered by the oil film
_____________.
14 1222 B The spray holes in diesel engine fue diesel fuel
using carbon solvent and _____________.
14 1223 D When excessive fuel dilution is notedcentrifuged
be _____________.
14 1224 C The diesel engine shown in the illus four-stroke/cycle engine
at the end of the
compression stroke
14 1225 D Figure "D" shown in the illustration scavenging port

14 1226 B An overspeed trip serves to ______ stop the engine by

cutting off the cooling
water supply
14 1227 D In an operating diesel engine, which Noise coming from that
an indication of a leaking air startin air starting valve.

14 1228 B Bluish smoke in the exhaust of an opan overheated engine

caused by ______________.
14 1229 B Which of the listed cylinder liner su Dull black appearance.
proper lubrication?
14 1230 C Pyrometer thermocouples should be monthly
carbon deposits ____________.
14 1231 B To function properly, oil control rin prevent any lubricant
 piston must distribute sufficient oil t from reaching the
and must also _____________. compression rings

14 1232 D The dripping of fuel from an injectorearly combustion

terminates, often results in ____________.

14 1233 D When fuel oil has seriously contaminfilter to remove the fuel
lubricating oil, you should _______ oil
14 1234 A A diesel engine may fail to start du low air charge
temperature
14 1235 B A diesel engine electric starting mot disengage the throw out
condition. Continuing to operate the bearing
14 1236 C An overspeed trip stops a diesel eng runs out of fuel
_____________.

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14 1237 A Where engine bores exceed 230 mm, a bursting disc or flame
arrestor is fitted ____________.

14 1238 B All alarms occurring on the control unit of the device shown in
the illustration will ___________.

14 1239 D What is the average piston speed of an engine with a 12 inch

stroke, operating at 900 RPM?
14 1240 A When the cold tappet clearance is less than that specified by the
engine manufacturer, the diesel engine valves will
14 1241 D In order to keep excess oil from the intake ports in two-
stroke/cycle diesel engines, ______________.

14 1242 B If it becomes necessary to clean the spray holes in a diesel

engine fuel injector, you should use a suitable size piano wire and
14 1243 C A decrease in the flash point of diesel engine lube oil indicates
the lube oil has become _____________.
14 1244 B The ratio of the brake horsepower to the indicated horsepower of
a diesel engine is its ______________.
14 1245 B Turbulence is created in the cylinders of a diesel engine to
_____________.
14 1246 C The device shown in the illustration is used to secure the air
supply to a diesel engine when the engine overspeeds. In order
for this to occur, supplied oil pressu _____________.
 14 1247 C The main operating characteristic of diesel engines which
distinguishes them from other internal combustion engines is the
14 1248 A The firing order of an in-line, four-stroke/cycle, six cylinder,
auxiliary diesel engine is 1-5-3-6-2-4. When the #1 cylinder is
firing at top dead center, the #3 piston is ____________.
14 1249 C A diesel engine is warmed up and white vapor is noted in the
exhaust, this could indicate _____________.
14 1250 B How are the pressure and temperature affected in a diesel
engine cylinder during compression?
14 1251 C Slots are provided in a diesel engine piston oil scraper ring to
_____________.

14 1252 C A broken pintle in a fuel injector usually causes _________.

14 1253 A If a used lube oil analysis indicates excessive fuel dilution, the
lube oil should be _____________.
14 1254 D The RPM of "A" is 100 and hobbed with 96 teeth. If gears "B",
"C", and "D" have 80, 30, and 46 teeth respectively, the RPM of
"D" in the gear train illustration is __________.

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14 1255 C Diesel engine operating conditions are indicated by the color of
the exhaust smoke. Blue smoke can indicate _____________.

14 1256 C A diesel engine is provided with an overspeed throw-out weight

shown in the illustration, and is tripping out at too low an RPM. In
order to correct this problem, you should ___________.
14 1257 B The system shown in the illustration utilizes a water transducer
which is _____________.

14 1258 B Oil accumulating in the exhaust piping or manifold of a diesel

engine can be caused by ________________.
14 1259 D If the compression ratio is increased on any diesel engine,
_____________.
14 1260 A In diesel engines, the four basic events (intake, compression,
power, and exhaust) are performed once in ______________.

14 1261 B The upper edges of the piston rings, shown in the illustration are
rounded off to ____________.
14 1262 C A practical way of checking for excessive fuel injection in one
cylinder of an operating diesel engine_____________.

14 1263 A A "detergent-type" lube oil, used in a diesel engine, should be

 replaced when _____________.
14 1264 A On the indicator card shown in the illustration, point "B" indicates
_____________.
14 1265 D Diesel engine exhaust valve springs are under compression when
they are __________.
14 1266 D The butterfly valve overspeed device, shown in the illustration, is
actuated by the engine overspeeding, and ____________.

14 1267 C A diesel engine with high lugging capacity, would be necessary

for driving a _____________.
14 1268 B Which of the factors listed has the greatest effect on the
mechanical efficiency of a diesel engine?
14 1269 B What determines the number of events occurring in a cycle of
operation in an internal combustion engine?
14 1270 B A diesel engine may fail to start when being cranked, due to
14 1271 D The function of the piston compression rings used in a diesel
engine is to _____________.

14 1272 D Which of the following problems could cause misalignment

between the needle valve and nozzle in a fuel injection nozzle?
14 1273 B Which of the following test points should be considered a
determining factor as to whether or not a diesel generator's lube
oil should be drained and renewed?

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14 1274 A Which of the following statements r The value of the
principle of the water transducer us capacitor varies with the
the illustration? dielectric constant of the
liquid flowing through it.

14 1275 C If a diesel engine hydraulic starting throw-out bearing

the engine, your FIRST check should be the _____________.
14 1276 B An overspeed safety shutoff for a di Piece #8 will move up
illustration. Which of the following movements will occur if the
engine overspeeds?
14 1277 A Which of the following statements deWhen fuel oil is injected
characteristics of a precombustion into the precombustion
chamber, it does not
need to be as finely
atomized as the fuel oil
in diesel engines having
 direct injection.

14 1278 A On a diesel engine, using a distributeOpen the cylinder test

that is not running, which of the fo cocks and check for
detect leaking air starting valves? blowing air.

14 1279 A Modern marine diesel engines using amcombination of

operate on a combustion cycle whic constant volume and
constant pressure
14 1280 C Which of the listed devices could be Steel brush
ring grooving tool used to remove hard carbon deposits from
piston ring grooves in preparation for installing new rings?
14 1281 C The main function of piston compresprevent excessive
cylinder liner wear

14 1282 A Visual inspection of a fuel injector valve leakage

overhaul, shows heat discoloration of the lower end of the valve.
This is indicative of ____________.
14 1283 C How often should the lubricating oil After every trip
changed?

14 1284 B The flywheel reduces speed fluctua maintaining a constant

rack setting
14 1285 B One of the factors limiting the amougovernor sensitivity
a modern marine diesel engine is the ____________.
14 1286 C The overspeed trip device installed ispring force
automatically actuated by _____________.
14 1287 C Modern marine diesel engines equipentirely constant
injection operate on a combustion phpressure
_________.

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14 1288 D Turbulence in the cylinder of a two- directional intake valve
diesel engine is mainly created by ports
14 1289 A In a single acting, two-stroke/cycle, once every crankshaft
power impulse in an individual cyl revolution
14 1290 D An indicator card or pressure-volu compression ratio of the
graphically the ____________. engine

14 1291 C Piston compression rings used in a dtransfer heat from the

_____________. cylinder to the piston
 14 1293 D To lubricate the illustrated starting add ATF to the housing
to a level just above the
bottom of component
#31
14 1294 B Which of the following statements r The value of the
principle of the water transducer us capacitor varies with the
the illustration? dielectric consistency of
the liquid flowing through
it.

14 1295 C White smoke exhausting from a diesehigh combustion

___________. temperature
14 1296 A A diesel engine is equipped with the decreasing the
shown in the illustration. At the ins compression on spring
found to be tripping out at too high #12
lower the tripping speed RPM was carried out by
14 1297 C The theoretical minimum compression
8:01
compression ignition in a direct injection diesel engine is
14 1298 B A diesel engine is operating under a a missing air intake filter
pressures and high exhaust temperatures. The most probable
cause of this condition is ________________.
14 1299 A A multi-orifice fuel injection nozzle Open combustion
the listed types of combustion cham chamber
14 1300 B A diesel engine which is rated for noslow-speed diesel
crankshaft speed of 800 RPM, is commonly classed as a
14 1301 B Which of the following statements reControl the amount of
compression rings installed at the toplube oil burned in the
combustion chamber.

14 1302 B Because of the close tolerances usedgrinding the spare

pumps, a worn plunger requires __ plunger to the barrel
14 1303 A If the oil control rings were install Excessive oil pumping
engine piston, which of the followin would occur.
14 1304 C A diesel engine emits blue exhaust s cold intake air
_____________.

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14 1305 D If a diesel engine is smoking excessilow exhaust back
could be _____________. pressure
14 1306 D For most diesel propulsion and genermoving the governor
trip device will stop the engine by control to stop
14 1307 D A diesel engine exhaust valve sprin the valve is open
_____________.
 14 1308 D If the diesel engine starter-drive me The engine will stall.
after the engine starts, which of the following situations will occur?
14 1309 B The highest loads applied to the die axial loads
bearings are ____________.
14 1310 A During which of the listed piston stroIntake stroke
diesel engine, is the piston moving downward?
14 1311 B Combustion gases formed in the cylin
cylinder valves
prevented from blowing past the piston by _____________.
14 1312 B While overhauling a jerk-type fuel pDelivery check valve
the pump plunger. Which of the parts listed below must also be
replaced?
14 1314 A The purpose of the flywheel is to provide energy to
operate the engine
between power impulses
14 1315 C Which of the following statements isVibration sensors are not
vibration sensing device used with t used with centrifuges
illustration? currently installed on
diesel vessels due to
excessive vibrations
developed by the main
propulsion units.

14 1316 D An emergency diesel generator shouldangerous overspeeding

the event of __________.

14 1317 A Increasing the compression ratio of increased horsepower

maintaining the designed rate of fuel flow will result in
14 1318 C Black smoke exhausting from an oper
water in the fuel
indication of poor combustion which may be caused by
14 1319 A Which of the following statements isAstern power is to be
astern power for diesel main propul provided in a sufficient
amount to secure proper
control of the ship in all
normal circumstances.

overload conditions.

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14 1320 D What is the function of the device l It provides a low
illustration? pressure point for the
addition of chemicals
 into the boiler feed
system.
14 1321 A In a modern internal combustion diesbedplate or base
part of the engine is referred to as the _________.
14 1322 D If the plunger or barrel of a fuel in only the replacement of
damaged, _____________. the entire pump would be
acceptable
14 1323 D A well-lubricated bearing surface a well knurled
14 1324 A Waste heat boilers may be equipped prevent air binding
heater heads to ____________.
14 1325 D Provision is to be made for ventilati aperture not exceeding
engine crankcase by means of a sma1" in diameter

14 1326 C According to U. S. Coast Guard Regu

a week
combustion engine driven emergency generators shall be
operated under load for at least two hours at least once
14 1327 B Which of the following statements deAll excessive amounts of
excessive microbiological growths wgrowth will cause the
main engines of the
vessel to stall due to the
inability to supply the
proper quantities of fuel
to satisfy the existing
load.
14 1328 D The device labeled "B", shown in theupper ring chamber
___________.
14 1329 C Which device is used to prevent over"13"
illustrated distiller?
14 1330 A The heat exchanger plates, used in t Titanium
illustration, are produced from which of the listed materials?
14 1331 C When installing the bearing cap on t If the device is covered
illustration, which of the precaution with abrasive material or
contaminates, the unit
may be reassembled,
provided an abnormal
method of reassembly is
followed.
14 1332 D If the demister used in the device shoThe vacuum of the
improperly installed, which of the f device will increase.

salinity cell.

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 United States Coast Guard
14 1333 D If the detergent type lubricating oil must be centrifuged
is black, the oil _____________.

14 1334 C If valve "H" shown in the illustratio the absolute pressure of

distiller is in operation, _________ the unit will increase with
an associated decrease
in shell temperature.

14 1335 D Which of the following statements r The pump supplies the

functions provided by the item label motive force to the
illustration? ejectors and removes
the excess distillate.

14 1336 B Coast Guard Regulations (46 CFR) rlow lube oil level alarm
generator sets, with forced lubricati system
with a _____________.
14 1337 C The symbol shown in the illustrationtwo position switch
____________.
14 1338 C From the graph shown in the illustrat86 mm
temperature required is to be 167°F, and the specific gravity of
the oil is .98 kg/dm3 at 59°F, what size regulating ring is
required?
14 1339 D What is used as the primary operati Light phase liquid
discharge cycle, shown in the illustration?
14 1340 B The device labeled "H", shown in thecentripetation
i chamber
the __________. bottom gasket
14 1341 A The side clearance of the compressiopermit gas pressure
pistons is necessary to ___________behind and on top of the
rings
14 1342 A What is the function of device "C" shIt removes impurities
entrained in the vapors
produced in section "G".
14 1343 C Which of the following conditions isThe oil should be
lubricating oil of a diesel engine tur purified.
use?
14 1344 C The device labeled "A", shown in thecentripetal pump cover
_________.
14 1345 D Under normal operating conditions, tin the upper third of the
"N" shown in the illustration is ___ glass

14 1346 C A propulsion diesel engine, having 5%

of over 300 HP, and driving a controllable pitch propeller, must
be fitted with a separate overspeed device, in addition to the
normal governor. This second device is to prevent the engine
from exceeding the rated speed by more than _____________.

14 1347 A What is the function of item "D" show

It heats the entering
feedwater.
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14 1348 D If the separating temperature is to remain constant, what is the
relationship between the specific gravity of the oil and the
required size of the regulating ring?

14 1349 C The device labeled "P" shown in the illustration is properly called
the ________.
14 1350 D Which of the following conditions occurs in the section labeled
"F" of the device shown in the illustration?

14 1351 D In an internal combustion engine, which of the devices listed will

force the compression rings to seal the compression gases in
the space above the piston?
14 1352 D When disassembling or assembling an injection pump plunger
and barrel you should _____________.
14 1353 D Oil oxidation, as a result of excessively high lube oil temperature,
is harmful to a diesel engine because_____________.
14 1354 A Line "K" shown in the illustration is the ______________.

14 1355 A Prior to starting, the volume of liquid retained in space "J" of the
device shown in the illustration is _________.

14 1356 C According to Coast Guard Regulations (46 CFR), how often shall
internal combustion engine driven emergency generators be
operated under load?
14 1357 B What occurs in the space labeled "G" of the device shown in the
illustration?

14 1358 C Using the graph shown in the illustration, the oil being separated
has a specific gravity of .87 kg/dm3 at 72.5‚C. What will be the
specific gravity if the temperature is lowered to 40‚C?
14 1359 B Which of the valve arrangements listed would be correct for
operating the distillation plant shown in the illustration?

14 1360 C Item "M" shown in the illustration is the _____________.

 14 1361 D In an operating diesel engine, the sealing of the cylinder is the
result of the compression rings being forced against the cylinder
walls by _____________.
14 1362 B Surface irregularities, such as erosion and pitting on injection
pump plungers, will _____________.

14 1363 D The oxidation by-products forming in diesel engine lube oil can
cause _____________.

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14 1364 C In a large slow-speed propulsion diesagainst the crosshead
to the crosshead is ______________during power stroke and
away from the crosshead
during the compression
stroke
14 1365 D If a particular liquid has a specific .910 kg/dm3
what will be the specific gravity of the liquid, as determined from
the graph shown in the illustration, if the temperature is increased
to 167‚F?
14 1366 B Coast Guard Regulations (46 CFR) re
be equipped with a water
exhaust pipe from a diesel engine cooled muffler
14 1367 A The line shown in the illustration, idedistillate pump discharge
________.
14 1368 A The primary function of line "J" shown
remove air and non-
_____________. condensable gases from
the unit
14 1369 C The discharge nozzle shown in the illA
letter _______________.
14 1370 C For the operation of the illustrated The feed water enters
expected at the connection labeled " the device.

14 1371 A Which of the following statements isThree compression and

rings shown in the illustration? one oil scraper ring are
pictured.

14 1372 A Uneven bolt tightening during the inst

binding of pump moving
pump can result in _____________. parts
14 1373 A Which of the following operational cThe oil oxidizes and
diesel engine lube oil at extremely forms carbon deposits.
14 1374 C From the graph shown in the illustrat86 mm
regulating ring required for the proper operation of the fuel oil
centrifuge if the fuel oil specific gravity is 0.9 kg/dm3 at 68°F, and
 the separating temperature is 158°F.
14 1375 C The function of device "O" shown inregulate
t the amount of
_________. brine entering the unit

14 1376 C Coast Guard Regulations (46 CFR) re

be equipped with a water-have adequate insulation
exhaust pipe from a diesel engine t cooled muffler
14 1377 B Which of the following represents t The ejectors do not
in conjunction with the ejectors? require a motive power.

14 1378 D An improperly assembled centrifuge,Excessive wear of fuel

illustration, may result in which of injection equipment.
conditions to occur?
14 1379 B Which of the operating positions, fo 1
illustration, should be chosen to maintain the circuit in continuous
flow, regardless of failure to the included down stream
components?

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14 1380 B Which of the following is NOT a funIt supplies feed water to
through item "P" shown in the illustrevaporator.

14 1381 C The purpose of piston ring end clea allow the combustion
gases to press the ring
down on the land

14 1382 D If lost motion is present in an indiv Fuel injection will be

of the following problems will occurincreased.
14 1383 B Which of the listed conditions can caDirty lube oil filter
too much lube oil?
14 1384 D The symbol with the output "ee" shown
The device is used to
properly called a blocking valve. Whinterrupt the control
statements describes its function wh signal to port "J" of the
speed diesel engine pneumatic controair start distributor shown
in illustration MO-0053.

14 1385 D The flange identified by the letter "Tattached to the outlet of

________. the brine ejector
14 1386 A A diesel engine is driving an alterna 1980 to 2070 RPM
RPM. The overspeed governor is normally required to be set
within a range of ______________.
14 1387 C Failure to establish sufficient vacuu improper operation of the
 shown in the illustration may be the brine pump
14 1388 C Excess brine accumulated in the distithe hydrokineter labeled
illustration, is removed during norm "21"
_______________.

14 1389 D Which of the components listed mayShaft bull gear

Guard regulations for the unit shown in the illustration?
14 1390 A Which of the listed fluids exits the Sea water from the
the illustration? condenser plate
assembly.
14 1391 C The upper piston compression ring cA
overheating by a heat dam. This physical concept is shown in the
illustration and designated by the figure lettered as _______.
14 1392 D If the discharge valve of the fuel in Injection timing will be
illustration, leaks during operation, increased.
conditions should be expected?
14 1393 B Excessive lube oil consumption in a late combustion
by _____________.
14 1394 D The circuit shown in the illustration pneumatic actuated,
______________. multiple position, control
unit

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14 1395 D Which of the listed fluids enters the Jacket water
the illustration?

14 1396 C What is the correct term for the orifiInlet orifice

the device shown in the illustration?
14 1397 C When tightening the lock ring "G" ofThe lock ring insures
illustration, two events are simulta proper contact between
of the following statements representthe bowl top and the
sliding bowl bottom, in
addition to compressing
the disc stack.

14 1398 A In an actual installation, the flange i overboard discharge line

shown in the illustration, can be directly connected from the brine
ejector discharge to the _____________.
14 1399 D Which of the following statements deThe regulator reduces
device labeled "C" shown in the illusthe pressure of the
supply air to provide
 ancillary main engine
services.
14 1400 B Item "F" shown in the illustration i flow limiting device

14 1401 A In diesel engines, hydraulic valve lifreduce valve gear

____________. pounding
14 1402 D If the discharge valve of the fuel in injection timing will be
illustration, allows fuel to leak out o advanced
14 1403 B Which of the following problems ca Dirty lube oil filters
consumption of the lubricating oil in a diesel engine?
14 1404 D What is the function of the device l The heat exchanger
illustration? serves to heat the jacket
water during cold water
operation.

14 1405 C When tightening the plate type heat prevent damage to the
illustration, care must be taken to _ aluminum plates

14 1406 B Auxiliary diesel engines can be autolow lube oil temperature

result of __________.
14 1407 D What would happen if valve "25", sho
The unit would continue
vibrated open with the unit in operatto operate with no
adverse effects.

14 1408 D If valve "D" is opened during the norThe amount of vapor

shown in the illustration, which of thformed in the evaporator
will increase.

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14 1409 C Excluding line losses, how many dist 3
as sea water flows through the heat exchangers in the cooling
system shown in the illustration?
14 1410 B Which of the tools listed must be us Torque wrench
exchanger used in the device shown in the illustration?
14 1411 A Valve lash, or clearance refers to t clearance between the
top of the valve stem and
the rocker arm
14 1412 D The area indicated by the letter "L" pre-injection chamber
illustration is properly called the __________.
 14 1413 A The operation of the lube oil cooler, The temperature of the
item #4, will be characterized by whsea water entering the
statements? cooler will be higher
when operating with the
distiller.

14 1414 C If item "F" begins leaking during op The oil/water interface

operating conditions will not occur? will move outward from
the vertical axis of the
machine.
14 1415 B What occurs within the tubes of the The heat from the jacket
the illustration? water passing within the
tubes is being
transferred to the feed
water on the outside of
the tubes.
14 1416 D Which of the following conditions c Improper venting during
leakage into the illustrated device? start-up.

14 1417 D After removing the bowl hood of theDisassemble the entire

illustration, excessive quantities of unit, clean all
the following statements represents tcomponents, replace all
situation? defective discs and use
the proper lubricant
where required.

14 1418 C Where is the latent heat obtained to Only as it passes through

feedwater in the illustrated distiller? device "20".
14 1419 D The device shown in the illustration iThe output is for speed
control systems. If the output of "2" jumps and is utilized to
governor, what will be its primary f ensure the transmission
of stepped speed
reductions.

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14 1420 D Which of the following statements deThe bowl will fail to close,
annular spaces, indicated by the lett but the unit will be
the illustration, became restricted? capable of shooting while
in operation.
14 1421 A In some modern large diesel engines,Bedplate
 used as the support for the main bearings?
14 1422 D After a recent overhaul of the devicean improperly adjusted
the unit floods and the shell pressurefeed water regulator
water supplied to the unit. This is caused by ______________.
14 1423 B Excessive piston ring wear in a diesehigh lube oil viscosity
_____________.
14 1424 C If the aftercoolers shown in the illus The flow to the
become fouled on the sea water side,condenser will be
to the distiller condenser be affectedreduced while the output
of the distiller will be
increased.
14 1425 B Which of the following statements dthe included angle of oil
illustration? flow
14 1426 D Which of the listed conditions represFresh water will not be
item #8 in the illustration fails whil distilled due to
insufficient heating.

14 1427 B If valve "O" of the unit shown in theThe unit will flood,
normal operation, which of the follo vacuum will decrease,
consequences? shell temperature will
remain the same, and
the relief valve "27" will
lift.

14 1428 C Where does the shoot cycle operatingWhile traveling under

with the rotating forces of the devicedisc stack "N".
14 1430 D Which of the following statements deThe shuttle valve
for the device shown in the illustrati compensates for any
air start system? decrease in the
operator's physical
abilities.
14 1431 B Which of the following statements isThe exhaust valves are
bridge and hydraulic lash adjuster a directly closed by the
illustration? action of the bridge
spring.

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14 1432 D Item "10" shown in the illustration prevent damage to
device "9" by reducing
turbulence
 14 1433 C Sticking of diesel engine piston co high compression
by _____________. pressure
14 1434 A The device labeled "C" shown in theupper locking ring
________.
14 1435 D During operation which device liste "22"
condensable gases from the unit shown in the illustration?
14 1436 B The unit shown in the illustration is The liquid enters the
discharge cycle. The operating liqui opening space,
energized and space "J" is filling up controlled by the
actions should occur next? discharge port "S",
thereby causing the
sliding bowl bottom to
move upwards.
14 1437 D The gasket "U" shown in the illustratsliding bowl bottom
ensure the movement of the _________.
14 1438 D The area indicated by the letter "J" operating chamber
illustration is properly known as the __________.
14 1439 B During the normal operation of the The solenoid valve is
illustration, the operating liquid sol closed and the bypass
should be in which position? valve is open.
14 1440 B Regulator"17B" shown in the illustrat0.35 bar
output of 1.2 bar and the input signal to "1" is currently 0.42 bar.
If the output from "17A" can not exceed 0.85 bar, then the current
output from "2" should be __________.
14 1441 A What is the purpose of a hydraulic vAllows for constant
contact between the
valve stem and the
rocker arm regardless of
whether the engine is
cold or warm.
14 1442 A If a diesel engine runs roughly, whicFuel
likely to be at fault?
14 1443 C Worn diesel engine intake valve guidincreased engine
_____________. breathing efficiency
14 1444 D Which of the following statements deThe volume is increased
volume of water vapor as it is expos as condensation occurs
existing in the device labeled "24" shat the tube surfaces.

14 1445 C Item "O" of the device shown in the fiair flow nut
________________.

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14 1446 C Item "A" the illustration is a/an __ indent operated, four
position, four-way valve

14 1447 D Which set of valves will be opened i"B" and "D", "L" and "M"
from the main engine jacket cooling water system shown in the
illustration?
14 1448 D The wear liner shown in the illustrati"G"
_____.
14 1449 D The area indicated by the letter "W",closing chamber
correctly termed the __________________.
14 1450 D What is the function of the item "7" sThe jacket water pump
circulates water only
through the jacket water
cooling system to provide
engine cooling.
14 1451 C Diesel engine valve springs functio hold the valves open

14 1452 A In the common rail system, excessivimproper adjustment of

be caused by _____________. the bypass valve

14 1453 D Which of the following conditions caLow lube oil temperature

consumption in a diesel engine?
14 1454 C The items labeled "21" and "22", show
distillate and non-
used to remove ____________. condensable gases

14 1455 D The port "X" shown in the illustratioOperating backflush

adjoining chamber. During what cycle
cycle
14 1456 D Which of the conditions listed wouldA decrease in the level of
tube leak within the distiller shown inthe main engine
expansion tank as
indicated by a low level
alarm.
14 1457 D The graphic line between items "27",ambient venting devices
the illustration, is used to indicate the use of ____________.
14 1458 B The device labeled "D", as shown inhood
t
_________.
14 1459 D Which of the following statements deThe output of "2" will
circuit shown in the illustration? always be less than the
input at "1" by 0.35 bar
(35 kPa), to prevent
engine damage due to
operation in the critical
speed range.

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 United States Coast Guard
14 1460 B Which of the following statements dThe brine will be
relation between the feed water enterremoved at a faster rate
illustration and brine being removedthan feed water entering
to prevent the possibility
of flooding.

14 1461 B The intake and exhaust valves used ipush rod pressure
returned to their seats by _____________.
14 1462 D In a large, low-speed, main propulsioIncrease fuel injection
injectors have formed carbon aroundpressure.
the following would help avoid further buildup?
14 1463 B When a leak has developed in the lubLube oil contaminated
diesel engine, which of the listed op with saltwater
expected to occur?
14 1464 B If the input signal rises above the s be the same as the
illustration, but remains below the s setpoint of "17B"
from "22A" will _____________.
14 1465 C What terminates the sludge dischargThe solenoid valve
in the illustration? opens, directs high
pressure fluid into the
closing chamber, and
results in an upward
movement of the sliding
piston.

14 1466 C The force developed by the liquid withe speed of the bowl
shown in the illustration depends u and the condition of seal
"H"
14 1467 D The item indicated by the letter "F" guide band
illustration is the _____________.
14 1468 C A six cylinder, two stroke/cycle dies 5,559 kW
has a cylinder constant of 0.998 while operating with a mean
effective pressure of 15 kg/cm2 at a speed of 100 RPM. What is
the metric brake horse power developed?
14 1469 B If the jacket water temperature rises place standby cooler in
diesel engine, you should FIRST __ operation
14 1470 C According to Coast Guard regulations,
required on all vessels of
are ____________. less than 150 gross tons

14 1471 D Valve cages are used on some large dreduce wear on the valve
 _____________. stem

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14 1472 A A 16 cylinder main propulsion dieselReplace and retime No.
of full load. All cylinder exhaust tem7 cylinder fuel pump.
950°F, except the No. 7 cylinder which is indicated at 1100°F. All
fuel racks are at 21-22 mm except No. 7 which is at 16mm. The
fuel injector nozzle for No. 7 cylinder was exchanged within the
last 3 hours. Which of the listed actions should be carried out
NEXT?
14 1473 B If the manufacturer advises of a nor 6.4 gallons (24.23 L)
4000 horsepower (2982.8 kW) diesel engine to be .0001 gal/hp-
hr, (.5076 mL/kW-hr), how much oil should the engine consume in
one 24 hour period if operated at full load?
14 1474 B The tube sheets installed in a fire-tu girder stays
normally connected by ____________.
14 1475 D Under normal conditions, the main smetal particles loosened
contamination is attributed to ____ by wear
14 1476 B In a diesel engine, a cylinder liner shI only is correct
______________. I. scuffed II. scored
14 1477 D In a diesel engine cooling system, t raw water pump
contact maker will be activated on e discharge
discharge temperature from the ____________.
14 1478 A Cooling water pumps driven by direct
facilitate bi-directional
are usually of the straight impeller operation
concentric housing to ____________.
14 1479 A A diesel engine indicator diagram ha17.6 kg/cm2
length of 12.5 cm. If the scale of the indicator spring is 1 mm = 1
kg/cm2, what is the cylinder mean effective pressure?
14 1480 A One cause of diesel engine surging cainjection pump plungers
_______________. stuck or worn
14 1481 C During warm-up the expansion of valvalve springs
is allowed for by the _____________.
14 1482 B In an operating diesel engine, preig excessively late fuel
_____________. injection
14 1483 D Excessive lube oil consumption can piston rings
14 1484 C The illustrated diesel engine startingde-energizing the
the drive/clutch mechanism from thesolenoid
engine has started by _________.

14 1485 A In a diesel engine, an integral liner I only

water __________. I. flows through the cylinder liner jackets II.
touches the outer side of the liner
 14 1486 C In a diesel engine, when refitting pi I only
should__________. I. check the ring gap at the smallest
diameter of the cylinder II. remove carbon from the ring
groove
14 1487 B What is the metric brake horse powe1,497 kW
an 83% efficient, six cylinder, two-stroke/cycle diesel engine with
a cylinder constant of 0.998 and a mean effective pressure of 15
kg/cm2 at 100 RPM?

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14 1488 B The diesel engine starting motor retureversing the direction of
mechanism to the position illustrat the starting motor

14 1489 C The engine cylinder illustrated is of dry liner type

14 1490 B A condition that can increase the foaexcessively high oil

________. temperatures
14 1491 B In the cylinder head illustrated, the gas pressure
______________.
14 1492 B If the diesel engine fuel injection ti backfire through the air
start of injection until the pistons ar intake
engine will _____________.
14 1493 B Excessive lubricating oil consumptioclogged lube oil piping
can be caused by _____________.
14 1494 B Which of the following conditions isIndicated exhaust
thermocouple element of a pyrometepressure readings will
excessive amounts of combustion byincrease.
14 1495 B What is the swept volume per cylinde0.45 cubic meters (450
cylinder, two-stroke/cycle diesel en L)
1700 mm stroke operating at 100 RPM?
14 1496 C The illustration is of a/an _________power take-off driven,
vane type, air
compressor
14 1497 C Which of the following statements reBeginning with number 1
for tightening the illustrated head boand moving clockwise,
tighten each in
consecutive order

14 1498 A The illustrated figure "A" represent a correctly tightened

centrifuge bowl
 14 1499 C The device labeled "B", shown in thethe same speed of the
__________. component labeled "7"
14 1500 C A seven cylinder, two-stroke/cycle, s 18%
with a cylinder indicated horsepower calculated as 1350 kW and
brake horsepower measured at 7466 kW has a mechanical
efficiency of ______________.
14 1501 C In a diesel engine, the spring force maximum firing pressure
operation is determined by _____________.
14 1502 D Significant retardation of a diesel ensmoother engine
result in _____________. operation
14 1503 D In a four-stroke/cycle diesel engine, exhaust pressure
guides can cause excessive ____________.
14 1504 A Forcing the exhaust gases from the cscavenging
engine with the aid of a blower is known as ________.

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14 1505 B Which of the following statements concerning this type of
illustrated, metal edge strainer is true?

14 1506 A An acceptable means of tightening connecting rod and main

bearing cap bolts is to measure the ___________. I. torque
applied to each nut and bolt assembly II. stretch of each nut
before and after tightening
14 1507 B A condition contributing to diesel engine piston rings sticking in
the ring grooves, is insufficient ring clearance at the ring
____________. I. gap II. side
14 1508 C In a trunk type diesel engine piston, the thickness of the head or
crown is determined by the ___________. I. strength
requirement II. heat dissipation requirement
14 1509 A A crankshaft whose center of gravity coincides with its center line
is said to be __________. I. staticly balanced
dynamically balanced
14 1510 D A seven cylinder, 2-stroke/cycle, single acting diesel engine has
a 750 mm bore and a 2000 mm stroke. What indicated power will
be developed if the average mean effective pressure is 14.8
kg/cm2 at a speed of 96 RPM?
14 1511 B The diesel engine shown in the illustration utilizes the type of
cylinder construction identified as ______________.
14 1512 D Late fuel oil injection in a diesel engine can result in
_____________.
 14 1513 A Which of the following problems represents one possible cause
of high lube oil consumption in a four stroke diesel engine?
14 1514 C Which segment of the cycle shown in the illustration represents
"supercharging"?
14 1515 C Which of the indicator diagrams illustrated depicts the condition
that should be corrected by the fitting of fewer or thinner shims to
the connecting rod?
14 1516 A The function of the illustrated device is to __________.

14 1517 A The formula "Nplan/33,000" is equal to the _____________.

14 1518 B The RPM of "A" is 150 and hobbed with 94 teeth. If gears "B",
"C", and "D" have 80, 30, and 46 teeth respectively, the RPM of
"D" in the gear train illustration is __________.
14 1519 C At bottom dead center, the centerline of the connecting rod
usually coincides with the _____________.
14 1520 C In a diesel engine, when installing new piston rings it is important
to check _____________. I. ring gap clearance II. side
clearance
14 1521 A A six cylinder 2-stroke/cycle, single acting diesel engine has a
580 mm bore and a 1700 mm stroke. What indicated power per
cylinder will be developed if the average mean effective pressure
is 15.3 kg/cm2 at a speed of 120 RPM?

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14 1522 D When fuel is injected late into a diesthe exhaust will be clear
_____________.
14 1523 B When using a fuel with a higher thanmaintain higher than
auxiliary diesel engine, you should normal jacket water
temperature
14 1524 B In which of the scavenging methods Return-flow
l
be located in the cylinder head?
14 1525 B In a diesel engine, the contact surfa I only
rings are those in contact with the ___________. I. back of the
ring groove II. bottom of the ring groove
14 1526 B The purpose of an interference angleI only
valve is to ________. I. work in conjunction with valve rotators
to rotate the valve II. break up seat deposits
14 1527 A Gear "D" hobbed with 42 teeth and ro
373.33 RPM
RPM. If gears "A", "B", and "C" have 42, 60, and 32 teeth
respectively, the RPM of "A" in the gear train illustration is
14 1528 B Which of the indicator diagrams illusA
 that should be corrected by advancing only the timing?
14 1529 C Which of the listed devices could be Steel brush
ring grooving tool?
14 1530 A According to Coast Guard regulations
bronze
keel cooler installations are permitted to be constructed of
14 1531 B The cylinder liner forming the cylinddry liner
water jacket is called a _____________.
14 1532 A In a diesel engine, late fuel injectionlow firing pressure
exhaust smoke with ______________.
14 1533 D Metal particles accumulated from th abrasive particles
diesel engine can result from lube oil that has been contaminated
with _____________.
14 1534 B Some diesel engines are supercharg slam charger
14 1535 B In the diesel engine shown in the illuTie rod
compression when a particular cylinder is firing?
14 1536 A In a coil-type forced circulation auxisteam demand response
____________. is comparatively rapid

14 1537 A Kingsbury thrust bearings are lubri I only

I. a flooded housing II. oil spray on collar and shoes
14 1538 C A diesel engine valve spring is und I only
is _________. I. open II. closed
14 1539 B Misalignment of the drive shaft and inside micrometer
detected by using a dial indicator or _____________.

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14 1540 C The device labeled "B", shown in theone half the speed of the
__________. component labeled "10"
14 1541 A Which type of diesel engine cylinderDry liner
illustration?
14 1542 C A diesel engine will lose power if fuefuel droplets will burn as
the cycle, because the ___________ they leave the fuel
injector
14 1543 B In a diesel engine, blow-by ______ increases exhaust back
pressure
14 1544 D The process of supplying a diesel engengine displacement
pressure greater than atmospheric is called _________.
14 1545 A The purpose of an interference angleI only
valve is to ________. I. break up seat deposits II. work in
conjunction with valve rotators to rotate the valve
14 1546 A A four cylinder, four stroke/cycle, si 3416 kW
740 mm bore and a 1500 mm stroke. What indicated power will
be developed if the average mean effective pressure is 18
 kg/cm2 at a speed of 90 RPM?
14 1547 B Excessive piston ring wear in a diesehigh lube oil viscosity
_____________.
14 1548 A The RPM of "D" is 900 and hobbed wi
168.75 RPM
"B", and "C" have 72, 64, and 24 teeth respectively, the RPM of
"A" in the gear train illustration is __________.
14 1549 B Which of the contaminants listed wou
Acid sludge
after filtering?
14 1550 C According to Coast Guard regulations,
required on all vessels of
are ____________. less than 150 gross tons

14 1551 B Which of the listed types of cylinderDry

engine shown in the illustration?
14 1552 B Late fuel injection timing is indica lower than normal
cylinder pressure and
low exhaust
temperature
14 1553 C If the analysis of used lube oil indic corrosive deterioration of
particles, this could indicate _____ a bearing
14 1554 B The exhaust system for a turbochargepower the aftercoolers
to _____________.
14 1556 C The speed droop characteristics of twEngine "B" will take a
driving two similar DC generators, agreater part of the load
the illustrated diagram, determine w than engine "A".
statements is true.
14 1557 D Which type of pump is typically usedCentrifugal
auxiliary boiler?

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14 1558 B The RPM of "D" is 900 and hobbed with 48 teeth. If gears "A",
"B", and "C" have 88, 66, and 22 teeth respectively, the RPM of
"A" in the gear train illustration is __________.
14 1559 C In a medium speed diesel engine, a trunk type piston may be
cooled by ____________. I. oil circulation though passages in
the piston crown II. heat transfer through piston rings and liner
wall
14 1560 B In a diesel engine jacket water cooler, with seawater cooling the
fresh water, the ___________.
 14 1561 B The cylinder liner shown in the illustration is a/an
_____________.
14 1562 A Late fuel injection in a diesel engine is indicated by low firing
pressure with _____________.
14 1563 B If a used lube oil analysis indicates an excessive chromate
content, this means _____________.
14 1564 D Which of the following beneficial results can be expected from
supercharging a previously naturally aspirated engine?
14 1565 D As illustrated, what is the maximum allowable clearance
permitted between the bearing and the shaft along its vertical
axis?
14 1566 C If an auxiliary diesel engine coolant temperature is higher than
normal, but the thermostat is determined not to be defective, you
would suspect a/an ___________.
14 1567 B The microbiological growths that affect fuel supplies can easily
be transported from one location to _________.
14 1568 D Using a diesel engine indicator P-V diagram, the cylinder mean
effective pressure is calculated to be 21.3 kg/cm2. What is the
scale of the spring used on the indicator if the diagram area is
18.46 cm2 with a length of 13 cm?
14 1569 A The pressure differential across a diesel engine lube oil system
duplex filter should be checked to _________.
14 1570 C The illustrated device is operated directly by _________.

14 1571 C In a unit injector the amount of fuel that will be forced through the
spray nozzle on each stroke of the plunger depends on
_____________.
14 1572 B Late fuel injection occurring at, or after TDC in a diesel engine is
indicated by excessive exhaust smok_____________.
14 1573 D Oil oxidation as a result of excessively high lube oil temperature,
is harmful to a diesel engine because_____________.
14 1574 A Compared to a naturally aspirated diesel engine, a
supercharged diesel engine has _____________.
14 1575 A The RPM of "A" is 150 and hobbed with 86 teeth. If gears "B",
"C", and "D" have 66, 22, and 48 teeth respectively, the RPM of
"D" in the gear train illustration is __________.
14 1576 A The combustion of fuel for the illustrated engine is initiated by
_____________.
chamber

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14 1577 A If the plunger or barrel of a fuel injection jerk pump becomes
damaged, _____________.
 14 1578 C When one cylinder has a lower compression pressure and
higher exhaust gas temperature than any of the other engine
cylinders, which of the conditions listed will be indicated?
14 1579 C What is the average piston speed of a seven-cylinder, two-
stroke/cycle diesel engine with a 580 mm bore and a 1700 mm
stroke operating at 100 RPM?
14 1580 D Starting aids such as glow plugs, are installed on _____.

14 1581 B The bore of a diesel engine cylinder describes the ________.

14 1582 D Late fuel injection in a diesel engine is indicated by low firing

pressure with _____________.
14 1583 B The quantity of air delivered at any given speed by a Roots-type
blower, as shown in the illustration, decreases as the pressure
ratio increases. This is due to the ______________.
14 1584 D Which of the listed pre-start procedures should be carried out
prior to starting a crosshead type diesel engine after an overhaul?
14 1585 B The direct acting mechanical governor used with some small
diesel engines, controls fuel flow to the engine by
_____________.

14 1586 A The speed droop characteristics of two similar diesel engines,

driving two similar AC generators, are connected in parallel. From
the illustrated diagram, determine which of the following
statements is true.
14 1587 A The RPM of "A" is 100 and hobbed with 72 teeth. If gears "B",
"C", and "D" have 64, 24, and 36 teeth respectively, the RPM of
"D" in the gear train illustration is __________.
14 1588 B The RPM of "A" is 150 and hobbed with 78 teeth. If gears "B",
"C", and "D" have 60, 32, and 42 teeth respectively, the RPM of
"D" in the gear train illustration is __________.
14 1589 C The RPM of "A" is 150 and hobbed with 82 teeth. If gears "B",
"C", and "D" have 62, 20, and 38 teeth respectively, the RPM of
"D" in the gear train illustration is __________.
14 1590 D The RPM of "A" is 150 and hobbed with 84 teeth. If gears "B",
"C", and "D" have 64, 24, and 36 teeth respectively, the RPM of
"D" in the gear train illustration is __________.
14 1591 C The purpose of counterboring the top of the cylinder liner,
extending down to the top point of travel of the top compression
ring, is to _____________.

14 1592 A Late fuel injection in a diesel engine is indicated by black or gray

exhaust smoke with a _____________.
14 1593 A A decrease in the flash point of the diesel engine lube oil
indicates the lube oil is _____________.

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14 1594 B A supercharged diesel engine, when ignition lag
naturally aspirated diesel engine, will develop an increase in
14 1595 C According to Coast Guard Regulati 100 psig
allowable boiler pressure in which a tubular gage glass may be
installed is _________.
14 1596 A The RPM of "D" is 800 and hobbed wi
122.58 RPM
"B", and "C" have 80, 62, and 20 teeth respectively, the RPM of
"A" in the gear train illustration is __________.
14 1597 C The RPM of "D" is 500 and hobbed wi
147.37 RPM
"B", and "C" have 42, 60, and 32 teeth respectively, the RPM of
"A" in the gear train illustration is __________.
14 1598 C The RPM of "D" is 700 and hobbed wi
72.84 RPM
"B", and "C" have 82, 62, and 20 teeth respectively, the RPM of
"A" in the gear train illustration is __________.
14 1599 C Which of the following statements reBeginning with number 1
for tightening the illustrated head boand moving clockwise,
tighten each in
consecutive order

14 1600 C If the speeder spring of a main prop increase until the

breaks while operating at full load, overspeed trip actuated
14 1601 C The sludge tank installed in the dies I only
collect _____________. I. sludge from the fuel oil settling tanks
and centrifuge II. water that has been collected in the settling
tank.
14 1602 D If a few injector spray holes becomeexcessive surging at
_____________. governed speed
14 1603 A Which of the following conditions isLube oil is diluted and its
unburned fuel contaminates the crankviscosity is reduced.
14 1604 D Which of the following conditions isIgnition lag increases.
of a previously naturally aspirated diesel engine?
14 1605 C The function of the device shown in slide
th the camshafts to
________. insure proper lubrication
14 1606 A Which of the indicator diagrams illusA
that should be corrected by retarding only the timing?
14 1607 D A piston is said to be at top dead ce opening the exhaust
ports

14 1608 B If the speed of a turbocharged dieseldecrease until the engine

constant the turbocharger speed wil speed increases
14 1609 D The device labeled "T", shown in theone half the speed of the
__________. component labeled "10"
14 1610 C At top dead center, the centerline of angularity of the piston
coincides with the _____________. motion
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14 1611 D Why are some diesel engine cylinderThe chromium will not
surface with porous chromium? wear out the piston rings.

14 1612 D A distorted spray pattern from a fuelhigher firing pressure

engine to have _____________.
14 1613 A Which of the listed bearing types is Piston wrist pin bushing
bearing?
14 1614 B The process of scavenging a two-str improve fuel flow volume
serves to _____________.
14 1615 C In a diesel engine, what is the adva I only
chambers over the open type of combustion chamber? I.
Precombustion chambers permit coarser fuel atomization. II.
Precombustion chambers allow lower fuel injection pressure.
14 1616 A A diesel generator has just been par an incorrect diesel
turbogenerator, but the load can not generator governor
could be caused by _____________.speed droop
adjustment
14 1617 B The term "diesel engine scavengin delivering more air into
the cylinder than it would
normally receive during
an ordinary charging
process
14 1618 C Most large, low-speed, main propulsdecrease the time
lube oil strainer to _____________. required between
cleanings
14 1619 D Which of the following statements cThe jacket water
in the illustration is correct? primarily looses its heat
at the cooler and is
further cooled in the
evaporator section.
14 1620 B In a large low-speed diesel engine e decreasing the thickness
can be restored by ____________. of the cylinder head
gasket

14 1621 C A method of finishing diesel engine cribbed honing

proper ring seating and lubrication is known as ____________.
14 1622 D Plugged spray holes in a diesel engindamage to pistons or
excessive smoking at idling speed, incylinder heads
14 1623 B One device used to determine the amo
autogenous ignition
engine lube oil is a/an ___________indicator
 14 1624 D Air scavenging of a diesel engine c blows out the exhaust
gases
14 1625 D Which of the indicator diagrams illusA
that should be corrected by retarding the timing, and the fitting of
thicker shims to the connecting rod?

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14 1626 D Which of the following statements deFull valve opening will
characteristics of valve cam, figure "occur slowly.
14 1627 A The upper leveling plates in a Kingsbpins through the base
place by _____________. ring
14 1628 B A distorted furnace in a fire-tube auxfiring for extended
of ____________. periods in the low fire
mode
14 1629 C Higher than normal temperature air pgreater overall efficiency
a diesel engine will result in _____________.
14 1630 C The rate of pressure rise during the valve overlap
in a diesel engine is influenced by the length of the ignition delay
period due to the ______.
14 1631 D After a long period of operation, a wexcessive wear during
ring action, will develop near the topthe seating period
ridge must be removed when piston rings are renewed in order to
prevent ______________.
14 1632 C Distortion of the spray pattern of a high firing pressure
indicated by a/an _____________.
14 1633 B Lube oil filters can be used to rem Acid sludge
lube oil. Which of the contaminants listed would remain in the
lube oil after filtering?
14 1634 B A diesel engine is supercharged in lower the no-load RPMs

14 1635 A The RPM of "D" is 500 and hobbed wi

93.75 RPM
"B", and "C" have 72, 64, and 24 teeth respectively, the RPM of
"A" in the gear train illustration is __________.
14 1636 B The illustrated piston rings are loca the top of the ring belt

14 1637 C The device shown in figure A of the inject fuel into the
_________. cylinder

14 1638 B The component identified as item #1test injector popping

pressure
14 1639 C Fuel delivery to the cylinder is ter hexil on component "H"
uncovers the spill port
14 1640 D The device shown in the illustration "E"
 scavenging air pressure on some recently built engines and would
replace the component identified as _____.
14 1641 B A properly honed diesel engine cylinprevent piston ring wear

14 1642 A When the opening pressure of a diesel

Quantity of fuel injected
greater than that specified by the e tends to be decreased.
the following problems can be expected?
14 1643 D Which of the following conditions coLeaking fuel injectors
fuel dilution of diesel engine lube oil?
14 1644 C If governor Item #19 in the illustrat increase until the
propulsion diesel engine operating unoverspeed trip actuated
RPM will __________.

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14 1645 A The device shown in the illustration is classified as a/an
_________.
14 1646 A The device shown in the illustration is classified as a/an
_________.
14 1647 D The device shown in the illustration is classified as a/an
_________.

14 1648 A The device shown in the illustration operates on the basic

principle of _________.
14 1649 D The termination of fuel injection for a large low speed diesel
engine is initiated by _________.
14 1650 C The valve gear shown in the illustration is for a four-stroke/cycle,
medium speed, diesel engine, with fuel injection commencing in
at 10° Before TDC. Approximately how many crankshaft degrees
from the point at which fuel injection begins, does the exhaust
valve push rod begin to move up?
14 1651 D In the diesel engine shown in the illustration, the space below the
cylinder liner lower seals is subjecte_____________.
14 1652 A When a fuel injection nozzle overheats, which of the problems
listed can be expected?
14 1653 D Fuel oil contamination of an auxiliary diesel engine lube oil can
result in _____________.
14 1654 D Which of the following devices will increase the power output of a
diesel engine without increasing its frictional load?
14 1655 C The component labled as part #20 in the illustration is used to
_______.

14 1656 D A diesel engine piston crown can crack from ____________.

 14 1657 C In the illustrated diesel engine, which lable points to the piston?

14 1658 A Scavenging in a turbocharged, four-stroke/cycle diesel engine is

accomplished ___________.
14 1659 D The ignition quality of diesel fuel becomes less critical as
______________.
14 1660 A The RPM of "A" is 100 and and has 76 teeth. If gears "B", "C",
and "D" have 60, 32, and 42 teeth respectively, the RPM of "D" in
the gear train illustration is __________.
14 1661 A The lower water seal on a diesel engine wet cylinder liner must
allow for liner axial movement. This seal is most commonly a
14 1662 B If the firing pressures in a diesel engine are high, although the
exhaust temperatures are normal, the cause may be
14 1663 D Diesel engine lube oil can become contaminated as a result of
_____________.

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14 1664 D Which of the following statements reEngine shaft, thrust
thrust transmission when a Kingsbury
collar, thrust bearing
diesel propulsion? housing, and thrust
shoes
14 1665 C The device shown in the illustration rotary type mist detector,
designed for use in four-
stroke, high speed diesel
engines

14 1666 D The RPM of "D" is 600 and has 48 te111.63 RPM

have 84, 66, and 22 teeth respectively, the RPM of "A" in the gear
train illustration is __________.
14 1667 B The RPM of "D" is 600 and has 46 te84.38 RPM
have 94, 80, and 30 teeth respectively, the RPM of "A" in the gear
train illustration is __________.
14 1668 B The RPM of "A" is 100 and and has 67.91
80 RPM
and "D" have 62, 20, and 38 teeth respectively, the RPM of "D" in
the gear train illustration is __________.
14 1669 C The RPM of "A" is 100 and has 88 te61.11 RPM
have 66, 22, and 48 teeth respectively, the RPM of "D" in the gear
train illustration is __________.
14 1670 A Cooling water pumps driven by direct
to turn in either direction
are usually of the straight impeller vane type pump with a
concentric housing to ____________.
 14 1671 D Which of the diesel engine cylinder liInternally finned liner.
cooling water passages?
14 1672 C If a single cylinder relief valve on a excessively late injection
while the engine is running, the cau timing for each cylinder
14 1673 D Which of the following conditions ind
Water discharging from
engine lube oil by fuel oil? the waste water outlet of
the lube oil purifier.
14 1674 C Which of the turbocharging systems Constant
l volume
average back pressure in the exhaust manifold?
14 1675 C The exhaust valve opens before bott I only
stroke engine to___________. I. allow for blow down II. reduce
pumping losses
14 1676 A The illustrated device is used to __ meter cylinder lubricating
oil to the engine

14 1677 B The line identified as "I" in the illu deliver fuel oil to the
injector

14 1678 D The device shown in the illustration pneumatic pressure

provided by _________.
14 1679 A An operating turbocharged diesel engrestricted turbocharger
power, is due to a/an ___________ air intake
14 1680 C The Total Base Number(TBN) valueresist
o changes in
refers to its ability to ____________viscosity with changes in
temperature

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14 1681 B A dry-type exhaust muffler clogged w
low exhaust temperature
14 1682 A Which of the following problems will
Fuel injection timing will
fuel injection nozzle sticks in the op change
14 1683 B One simple laboratory analysis of useparaffin test
out aboard ship is called the _____________.
14 1684 A Which of the turbocharging methodsConstant
l pressure
gases to the turbine at fairly uniform velocity and pressure?
14 1685 A The lower water seal on a diesel engneoprene O-ring
allow for liner expansion and contraction. This seal is most
commonly a _____________.
14 1686 C The illustrated starting motor disengde-energizing the
mechanism after the engine has star solenoid

14 1687 C A bendix drive starting motor disengspring force

flywheel by ______________.
 14 1688 C In a diesel engine, pistons are attach push rods
14 1689 D The component identified as item #9fuel injection metering
___________. system
14 1690 B The illustrated cylinder lubricator q unbolting and removing
inspected without draining the cylin the cover, item #14
___________.

14 1691 C It is easier to replace a dry cylinder of the thin wall thickness

____________.

14 1692 C If the needle valve in a fuel injectio fuel will leak into the
_____________. nozzle drain line
14 1693 A Which of the listed conditions can beViscosity is lowered.
has been diluted by fuel?
14 1694 D Intake air flow from a diesel engine exhaust gas pressure
proportional to engine __________.
14 1695 B The device shown in the illustration "E"
by _________.
14 1696 C Which instrument is used to take crafeeler gage
14 1697 C Which instrument is used to take crafeeler gage
14 1701 D One advantage of dry cylinder linerslower thermal expansion
_____________. rates than wet liners

14 1703 C The purpose of an interference angleI only

valve is to ________. I. seat the valve quickly II. break up seat
deposits
14 1704 D One characteristic of a pulse type t high average exhaust
_____________. manifold pressure

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14 1705 A The purpose of the delivery check valve used in a diesel fuel
injection jerk pump is to _________ I. assist in
a quick cutoff of fuel injection II. prevent fuel oil backflow from
the injection pump
14 1706 D In the illustrated engine, the fuel camshaft gear drive housing is
letter _______________.
14 1707 B In the large slow-speed main propulsion diesel engine shown in
the illustration, the part labeled "G" _____________.
14 1708 C To guarantee that a reduction gear bearing is receiving proper oil
supply, you should check the ___________.
14 1709 B If govenor Item #19 were to break on a main propulsion diesel
engine operating under full load, the engine RPM will
 14 1710 B If governor Item #10 in the illustration were to break on a main
propulsion diesel engine operating under full load, the engine
RPM will __________.
14 1711 C One of the advantages in the use of a dry liner over a wet liner is
_____________.

14 1712 D Heat damage to fuel injection nozzles on small high-speed diesel

engines, can be prevented by _____________.

14 1713 B When accumulated carbon at the air inlet ports of a two-

stroke/cycle diesel engine is being removed, you should take care
to avoid carbon particals _____________.
14 1714 B Which of the following turbocharging systems channels the
exhaust gases of each individual cylinder directly into the turbine
rotor blades?
14 1715 B The purpose of an interference angle in a diesel engine exhaust
valve is to ________. I. work in conjunction with valve rotators
to rotate the valve II. seat the valve quickly
14 1716 A The device most commonly used to measure exhaust gas
temperature of cyclinders is a _____________.
14 1717 D By comparing the exhaust gas output of each cylinder of a diesel
engine, one method of determining if the engine load is balanced
is by the use of a ______________.
14 1718 B By comparing the exhaust gas temperature of each cylinder, the
operator can determine if the load is balanced throughout the
engine. The device most commonly used is a _____________.
14 1719 D By comparing the exhaust gas output of each cylinder of a diesel
engine, one method of determining if the engine load is balanced
is by the use of a ______________.
14 1720 C The principal purpose of refractory and insulation installed in the
firebox of an auxiliary boiler is to ____________.

to maintain a pressure
seal

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14 1721 A Which of the following statements isThe valve stem guides
engine cylinder head and valve mec are cooled by heat
illustration? conducted by the jacket
cooling water.
14 1722 D The major cause of problems occurrin
incorrect replacement of
equipment is _____________. barrels and plungers of
 jerk pumps
14 1723 C Why should the main steam stop valve
To examine the valve
eased off its seat and then gently clostem for scars or nicks.

14 1724 A Which of the listed types of superc Exhaust gas

volumetric capacity proportional to turbocharger
14 1725 C According to Coast Guard Regulation
100 psig
boiler pressure where a tubular type gage glass may be installed
is ______________.
14 1726 B Before any work is to be carried out allow the boiler to cool
automatically fired auxiliary boiler, completely
14 1727 B When an additional load is applied t pneumatic seizure
using an inadequately inflated air bladder clutch unit, you can
expect _____________.
14 1728 D When two medium speed diesel engine
Propeller shock loads
in parallel to a common propeller shacan severly damage the
speed less than 100 RPM, which of th
clutch.
will apply?
14 1729 B All oil-fired boilers, reguardless of flame in boiler furnace is
with automatic safety control systemconfirmed
the burner valve when___________.
14 1730 D All oil-fired boilers, reguardless of flame in boiler furnace is
with automatic safety control systemconfirmed
the burner valve when___________.
14 1731 D The device shown in the illustration attach a special gauge to
cylinder head through an opening in take firing and
purpose of the device is to _______ compression readings
14 1732 D A defective injector nozzle in a propengine power losses
cause _____________.
14 1733 C Lubricating oil viscosity in an opera increasing cooling water
reduced by _____________. flow
14 1734 D Which of the following statements isAt zero load the intake
turbocharged four-stroke/cycle diesemanifold pressure is
greater than the exhaust
manifold pressure.
14 1735 A In an actual installation, the flange i saltwater inlet at "I"
shown in the illustration, can be directly connected from the brine
ejector discharge to the _____________.
14 1736 C Coast Guard Regulations (46 CFR) re
audible high water level
supply boilers to be provided with alarm

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14 1737 C Which of the listed effects would miI
 phosphate compounds have on the metal surfaces of the cooling
system of a diesel engine? I. Protects the coolant from freezing.
II. Protects metallic surfaces from corrosion.
14 1738 A Which of the listed effects would miI
on the cooling system of a diesel engine? I. Protects the coolant
from freezing. II. Protects metallic surfaces from corrosion.
14 1739 B Which of the listed effects would miI
compounds have on the metal surfaces of the cooling system of a
diesel engine? I. Protects the coolant from freezing. II. Protects
metallic surfaces from corrosion.
14 1741 B Diesel engine cylinder head test coc check cylinder lubrication

14 1742 C Dirt lodged on the nozzle valve seat erosion and cratering of
cause _____________. the nozzle orifices
14 1743 D A sudden decrease in the diesel enginloss of additives from the
an indication of ____________. lube oil
14 1744 A The relative air pressure in the inle greater than the average
diesel engine is usually __________exhaust manifold
pressure
14 1751 D Which of the listed cylinder head desThe valve cages are
illustration? provided for the exhaust
valves.

14 1752 D A leaking diesel engine fuel injecto prolonged maintenance

intervals
14 1754 B A turbocharged diesel engine will h constantly decreasing as
pressure _____________. engine load increases

14 1761 D Diesel engine cylinder head test coc check cylinder lubrication
prior to starting engine

14 1762 B Problems with the diesel engine fuelimproper adjustment

caused by _____________.
14 1763 B Which of the following faults would Excessive
a valve train
cooling system of a diesel engine? lubrication
14 1764 D What method is used to supply air toBy the action of the
engine shown in the illustration? turbocharger at full load.

14 1771 B When turning a new cylinder head ststud length

effective thread length of the stud is determined primarily by the
14 1772 B Which of the following problems is Improper lubrication
and injection system malfunctions?
14 1773 C Lube oil in the fresh water cooling camshaft seizure
result from a _____________.
14 1774 C Which of the diesel engine component
Impeller
density and helps to improve engine operating efficiency?

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14 1775 A Differential type fuel oil nozzles in I only
directly by _____________. I. spring pressure II. fuel oil
pressure
14 1776 D Fuel oil strainers should be made of I only
II. brass
14 1781 B One end of a cylinder for a medium ocrankcase
is sealed by the piston and rings, the other end is sealed by the
14 1782 D High cylinder firing pressure, acco improper fuel rack
temperature, can result from _____ positioning
14 1783 D Which harmful consequence may beClogged
th oil pump suction
accumulation? screens.
14 1784 D What is the function of the aftercooleDecrease the air density
engine air intake system?
14 1791 D An efficient seal between the cylind graphite packing
many diesel engines is obtained with _____________.
14 1792 C An increase in the fuel injection pu leaking delivery valve
caused by a/an _____________.
14 1793 D High lube oil temperatures developinhigh oil pressure
result from _____________.
14 1794 A The function of the aftercooler insta increase the density of
and intake manifold on some diesel ethe intake air
_____________.
14 1795 B A dirty fuel oil filter is can be detec I only
analysis II. observing the pressure drop across the filter
14 1801 B Which of the terms listed below reprNon-harmonic speed.
at which excessive engine vibration is created?
14 1803 D Lubricating oil used in a diesel eng reduce the wear of
bearing surfaces
14 1804 C Aftercooling of a turbocharged dieselhigher torque but lower
_____________. brake horsepower
14 1811 D Vibrations from diesel engines and torsional-vibration
isolated from the hull structure by dampers
14 1812 C Which of the conditions listed woul Improper fuel rack
cylinder firing pressure and low exh positioning.
14 1813 C One function of diesel engine lubricainduce carbon formation
on cylinder walls

14 1814 A When used in conjunction with a turincrease the density of

of an aftercooler is to ___________.the cylinder air charge

14 1821 B Which of the devices listed is install Planetary gear set

isolate some of the crankshaft vibrations caused by rotational
and reciprocating forces?
14 1822 C When fuel is injected too early in th high fuel economy
the engine to have _____________.
14 1824 C Performance of a turbocharged engi decreasing the amount
 _____________. of valve overlap

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14 1831 B Critical speeds occurring within the engine support vibration
main propulsion diesel engine may bisolator
damaging effects reduced by a/an _____________.
14 1832 A Early fuel injection timing is indica above normal with a
being _____________. below normal exhaust
temperature
14 1833 D In a diesel engine, the function of lu a film between the shafts
_____________. and bearings

14 1834 C The purpose of an aftercooler is to reduce the turbocharger

operating temperature
14 1841 B In the pressure-volume diagram shown
fuel injection after dribble
"A-d" indicates _______.

14 1842 A When fuel is injected in a diesel engiignition may be delayed

_____________.
14 1844 A The aftercooler inlet should be conneB
illustrated at the part labeled _______.
14 1845 D When fuel oil is accidentally mixed I only
following processes can be used to separate them? I. filtering
II. settling
14 1851 C Between the periods of injection anddetonation
i period
engine crankshaft rotates through the ____________.
14 1852 B Which of the listed set of conditions Loss of engine power
timing? and high exhaust
temperatures

14 1861 A The power/expansion stroke shown in

1 through 3
by the diagram numbers ____________.
14 1862 B If fuel injection in a diesel engine b fuel oil injection pressure
start of injection, ignition may be d may not be high enough
_____________.
14 1863 A A diesel engine exposed to widely v a high viscosity index
should use a lubricating oil with ____________.
14 1864 C The air supplied to the cylinders by air compressor
reduced in volume by a/an ______________.
14 1871 C Which of the following processes is Return air flow during
shown in the illustration? start-up upon achieving
ignition.
14 1872 B A diesel engine will lose power if fufuel will not be properly
 because the _____________. atomized in the cylinder

14 1874 C Which of the engine components listIntake manifold

density and helps to improve engine operating efficiency?
14 1875 C In a diesel engine, exhaust valves opI only
are uncovered to ___________. I. reduce pumping losses II.
reduce back pressure

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14 1881 C Modern marine diesel engines equipentirely constant
injection operate on a combustion c pressure

14 1882 B A fuel injection valve opening at a plate fuel injection

result in _____________.

14 1891 B In the large, slow-speed, main propuventuri tubes

the illustration, the upward motion of the piston draws scavenging
air through _____________.
14 1892 C When high firing pressures and low decreased piston-to-
simultaneously in a diesel engine, thicylinder head clearance
14 1901 D In a four-stroke/cycle diesel engine, up and draw in a fresh
power stroke, the piston will move air charge
14 1902 B If fuel injection occurs too early, a fuel will not be properly
because the _____________. atomized in the cylinder

14 1903 B A large, low-speed, crosshead, main low TBN value

using residual fuel oils must have a cylinder oil having a
14 1904 B Which of the conditions listed will oIntake valve burning is
intercooler installed in the diesel e eliminated.
the illustration?
14 1911 C For a four-stroke/cycle medium-speed
21‚-31‚
commences from 7 to 26 crankshaft degrees before top dead
center. After fuel injection commences, how many degrees does
the camshaft rotate before the exhaust valve push rod moves up?
14 1912 D Due to excessive water in the fuel, a fuel
d pumps
Before the engine can be started, the water must be removed
from the ____________.
14 1913 D A diesel engine should use which typNondetergent oil
14 1914 B The diesel engine shown in the illustincrease scavenge air
auxiliary blower to _____________.pressure at full load

14 1921 A During the diesel engine power stroke

formed by the connecting
type piston is a result of the angle rod and cylinder center
 line
14 1922 A A diesel engine fails to start due to fuel lines
Before the engine can be started, the water should be removed
from the _____________.
14 1924 B Which of the designs listed will kee Drive chain
contact in a Roots-type blower?
14 1932 A Faulty operation of diesel engine fuewater in the fuel oil
directly caused by _____________. supply
14 1933 D The thickness of the oil film to be d bearing pressure
main bearing, depends upon the _____________.

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14 1934 A Which of the Roots blower rotors listThree-helical lobes
two-stroke/cycle, medium-speed, diesel engine with the least
amount of turbulence and pulsation?
14 1941 B The side pressure per unit of area, reweight of the piston
of the motion of the connecting rod, depends primarily on the
14 1942 B A diesel engine fails to start becauseturn engine with jacking
to start the engine, you should ___ gear

14 1943 A The highest indicated lube oil pressucold at idle

be expected when the engine oil is ________.
14 1951 B In a single acting, four-stroke/cycle once every crankshaft
impulse in an individual cylinder o revolution
14 1952 A Water in the fuel can prevent the engirun at an irregular speed
from developing full power, or ____________.
14 1954 D The lobes of a Roots-type blower aredecrease air losses
spiral formed around the axes of ro around the lobes
14 1961 D The most rapid period of fuel combus
when fuel injection has
cylinder should begin just before thebeen completed
center and ______________.
14 1962 D Permitting a diesel engine fuel oil d overheated injection
_____________. pumps
14 1963 A The purpose of an oil mist detector iexcessive mist density in
engine is to warn of ____________. the crankcase
14 1964 C Most Roots-type blowers have two are extremely quiet at
high speed

14 1971 B As engine RPM is increased from idle

Compression ratio
which of the conditions listed will decrease?
14 1972 D If a diesel engine runs out of fuel, overheated injector
_____________. pumps
14 1974 A Some diesel engines are equipped wimore air to combine with
 provide ______________. the fuel
14 1981 A The pressure in an operating diesel eexpansion of the
rise for a short period after the pist combustion gases
result of the _______________________.
14 1982 C Air in the fuel lines to the fuel injec burn excessive amounts
will cause the engine to __________of lube oil
14 1983 C The TBN value of diesel engine luberesist
oi changes in
_____________. viscosity with changes in
temperature
14 1984 D Regarding the positive displacementbetween the rotating
illustration, air compression takes blower lobes

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14 1991 B Prior to starting, the purpose of tur test the starting system
diesel engine with the cylinder test cocks open, is to
14 1992 A Air in the fuel lines of a diesel engi ignition failure
_____________.
14 1993 B Which of the following characteristicLow viscosity index
the amount of deposits in the piston ring belt during the
combustion process in a diesel engine?
14 1994 B Which of the following terms best d Rotary vane
used to supercharge a diesel engine?
14 2001 D Starting a large propulsion diesel en increasing the quantity of
cold weather conditions can be madestarting air
14 2002 D If you suspect a diesel engine is misffuel line connections to
the fuel system, you should begin loothe cylinder injection
_____________. valves
14 2003 D The color of the diesel engine deterg"worn out" oil
operating diesel engine is black, this indicates _____________.
14 2004 A In a diesel engine, a positive displa gear driven by the
____________. engine
14 2005 C Which lubricating oil additive is use Flash point improvers
the tendency for sludge and varnish to form on the engine parts?
14 2011 D Which of the following statements reTo test the starting
rolling over a diesel engine with the system.
prior to starting?

14 2012 C A diesel engine is turned at normal clow lube oil temperature

fire. This can occur from _____________.
14 2020 D Sludge formation in a diesel engine lcarbonization of oils from
____________. the combustion
chambers
14 2021 B Before starting a diesel engine, you check the pyrometer
 _____________. readings
14 2022 D If the low level alarm of the diesel f overheated injection
you can expect trouble from _____ pumps
14 2023 A Proper lubrication of the main bearinthe direction of pressure
a single acting, four-stroke/cycle dieon the journals in four-
stroke/cycle diesel engine because stroke engines is
continuously reversing,
whereas in two-stroke
engines it is constant

14 2024 A An aftercooler installed between theincreases the density of

air inlet _____________. the air
14 2031 C Which of the following should always
Air filters
a diesel engine?
14 2032 B Air may be bled from the fuel syst blowing down the air
tanks
injectors

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14 2033 B The amount of fuel injected into a dithe firing pressure in the
injector, is controlled by _________ cylinder

14 2034 B If cooling water flow through the afteturbocharger will stall

power output of a turbocharged diesel engine will drop because
the _____________.
14 2041 D Prior to starting most medium-speedThe expansion tank
which of the procedures listed shoul should be topped off.

14 2042 D If you determine that entrained air infuel leakage in the

a diesel engine to stall, you should f injector pump's
_____________. discharge lines
14 2044 B Which of the following procedures sh
Bypass the aftercooler to
the use of a crosshead engine with a operate at sea speed.

14 2051 D In the starting process of a diesel en turn the flywheel

attain the compression conditions sufficient to ______________.
14 2054 D An increase in the load on a turboch exhaust temperature
operating at constant speed will result in an increase in
14 2061 B When attempting to restart a warm hExcessive fuel use
the following reactions can you expect?
14 2064 C The high air velocity leaving the co inlet nozzle ring
 turbocharger is converted to pressure in the __________.
14 2070 C Your vessel is about to begin maneuvused a higher than
easy restarting of a large heavy fuel normal cranking speed
stopped for some time, you should have ___________.
14 2071 D Which of the following conditions wFaulty combustion
form in the piston ring belt of a diesel engine?
14 2072 C Air in the fuel lines to the fuel injec lower compression
will result in _____________. pressures
14 2074 C Which of the operating characteristicEach set of lobes is
the blower shown in the illustration?independently driven
assuring proper timing.

14 2081 C Which of the following operating proTake all exhaust

out immediately after any diesel engitemperature readings.
14 2082 C Air in the fuel can cause _________high lube oil temperature
14 2091 D If a diesel engine starts firing, but insufficient fuel supply
speed, either without load or even under a small load, the cause
may be ______________.
14 2092 B After changing out the fuel filters thelow compression
The most probable cause for this condition is a/an

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14 2094 A When the load is increased on a turblag behind the increased
amount of increased air supplied by fuel supplied to the
_____________. engine
14 2101 B After starting a diesel engine, which Air box pressure
conditions should be checked FIRST?
14 2102 B Faulty operation of diesel engine fueexcessive fuel nozzle
direct cause of ______________. holder cooling
14 2104 D In a turbocharger, inlet air velocity i inlet nozzle ring
_____________.
14 2111 B While underway, which of the follo Manually trip the
in reversing a direct reversing large overspeed device.
diesel engine?
14 2112 D Dirt in a fuel oil system of a diesel damage to strainers
_____________.
14 2114 D The power developed by a large slo quantity of air it takes in
diesel engine is dependent upon th and retains in the
cylinders during a given
time period
14 2121 B During maneuvering operations for aFlywheel inertia
speed, main propulsion diesel engine, which of the following
actions is used to stop the shaft from turning prior to reversing the
 engine rotation?
14 2122 B The most common diesel engine fuelincorrect adjustments
caused by _____________.
14 2124 C When a diesel engine is operated at pair quantity aspirated
full load, a decrease will occur in the average _____________.
14 2131 D A ship is propelled by a direct rever properly inflating the air
engine. One step in reversing the direoperated clutch
this vessel is by ______________.
14 2132 B Diesel engine fuel oil contamination governor malfunctions
_____________.
14 2141 D A diesel engine should not be operatheavy carbon deposits
periods of time because __________will buildup on the valves
and in the exhaust
14 2142 B The major cause of fuel pump and inimproper adjustments
_____________.
14 2152 B A dirty fuel oil filter element can b visual inspection of the
element
14 2154 C Cylinder scavenging in a turbochargewithout cooling the
acting, diesel engine is accomplish pistons or cylinders
14 2161 D Operating a propulsion diesel enginedecreased fuel
designed normal load for prolonged pconsumption per brake
____________. horsepower
14 2162 B The main source of fuel pump and inimproper adjustments
is _____________.
14 2164 A Turbocharged four-stroke/cycle dieseimproving cylinder
overlap for _____________. scavenging
14 2171 A What harmful condition can result ifIncreased carbon
at very light loads for long periods obuildup.

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14 2172 A A faulty injector in one cylinder of cutting out individual
be located by ____________. injectors and noting
engine performance
14 2173 D Early injection timing is indicated high exhaust
temperature and low
firing pressure
14 2174 A In a turbocharged four-stroke/cycle dproduce a scavenging
valve remains open until after top deeffect in the combustion
valve opens before top dead center space
14 2181 A Operating a diesel engine under lighformation of carbon on
temperatures for an extended period the intake and exhaust
ports
14 2191 D While maneuvering, you discover h check the air filter for dirt
 turbocharger casing, you should ____________.

14 2192 C A change in the quality of fuel atomiincrease in engine speed

injector would be caused by a/an ______________.
14 2194 D A turbocharged, four-stroke/cycle dietemperature of the
overlap than a naturally aspirated fo exhaust gases
in order to increase the ______________.
14 2201 C In the construction of a diesel engin To provide accessibility
plates? to the cylinder liners.

14 2202 A When fuel enters the crankcase of a d ilutes the lube oil and
_____________. reduces its viscosity
14 2204 C The exhaust ports of a diesel engine reciprocating motion of
scavenging method are opened and cexhaust valves
14 2211 B A large, low-speed, main propulsion Increase
d the load limit
rated load and speed while the vesselsetting.
intensity of the seas increase, the engine speed governor
maintains the same RPM, although the load indicator indicates an
increase in load beyond its allowable limits. Which of the
following actions should be taken?
14 2212 B A change in the degree of fuel atomizair turbulence
greatly affects the _______________.
14 2214 A In a Roots-type rotary blower, the voengine speed
directly proportional to _____________.
14 2221 A A safety cover differs from other diespring-loaded pressure
that it is fitted with a __________. plate
14 2222 C The "breaking-up" of fuel as it entersairification
known as _____________.
14 2224 C On a diesel engine equipped with a the turbine speed
___________. depends on engine load

14 2231 C If a two-stroke/cycle diesel engine Move the fuel control

of lube oil into the cylinders, what mechanism to the no fuel
engine? position.

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14 2232 B Which of the following statements coThe greater the
a diesel engine cylinder is correct? atomization, the greater
the penetration.

14 2241 B If a single cylinder relief valve on Increase the cooling

begins to lift, but it is not possible water flow to the engine.
the following actions should be taken?
 14 2242 C The purpose of the interlocked thre control the rate of fuel oil
illustration is to ____________. flow to the engines

14 2244 C Which of the operating characteristicEach set of lobes is

type blower shown in the illustrationindependently driven,
assuring proper timing.

14 2252 D Clogged diesel engine fuel oil filte loss of power

14 2261 A Before shutting off the fuel supply t To prevent internal
speed diesel engine, why is it necessdamage from local
idle for a few minutes? overheating.
14 2264 B A Roots-type blower installed on som
heat the cylinder for
_____________. hotter compression

14 2271 C A normally operating diesel engine shutting off the air supply

14 2274 D The compression of air in a positive between the rotating

supercharging blower, occurs only blower lobes
14 2281 B When running a large, low-speed, maThe diesel oil must never
on heavy fuel, which of the followinbe allowed to mix with
observed when switching back over the heavy fuel.

14 2284 B The quantity of air delivered at any decrease in clearance

blower, as shown in the illustration, between the mating
ratio increases. This is due to the lobes
14 2291 C Cylinder linings constructed as an intThey conduct heat
characterized by which of the followpoorly.
14 2294 D In the positive displacement rotary Between the rotating
illustrated, where does the air bec blower lobes.
14 2301 A The main propulsion diesel continuesstop the combustion air
down. You should now attempt to _ supply

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14 2304 C A Roots-type blower installed on a dis engaged only when
_____________. turning ahead
 14 2311 D Before being shut down, a diesel engprevent governor surging
minutes in order to _____________.at shutdown

14 2314 B In the rotary blower shown in the ill Both turn clockwise
rotation do the rotors turn?

14 2321 A Insufficient end clearance on newly fi

jam in the least worn part
engine will cause the rings to ____ of the cylinder when the
rings expand
14 2324 D The power consumed during the scavscavenging loss
engine is known as the _____________.
14 2331 D If the piston ring gap remains insuff install oversized rings
rings, you should ___________.

14 2341 B When installing rings on a diesel en diametrical tension

the ring _____________.
14 2351 A You are installing new piston rings on
point of minimum
engine piston. To check the ring gap cylinder wear
be placed at the ____________.
14 2354 D The small clearances existing betweeprovide for normal timing
and between the lobes and casing of a Roots-type blower, must
be maintained to ______________.
14 2364 C When the timing gear backlash for arenewing the drive gear
become excessive, the problem is properly repaired by
_____________.
14 2371 A When a diesel engine is operated witseize and buckle
gap clearance less than that recommended by the manufacturer,
the ring will ____________.
14 2374 D Which of the following conditions wNicked blades
turbocharger for repair?
14 2381 D Which of the following problems may
Excessive wear
between a piston and cylinder liner is insufficient?
14 2384 D Which of the following precautions Reduce engine speed to
cleaning the air filter on a diesel en idle before removing the
turbocharger? filter.
14 2391 C A visual inspection of the chrome pl a broken ring
at the liner ports reveals vertical brown streaks on the face of the
rings. This condition indicates __________.
14 2394 D Which of the following conditions ma
Poor combustion
of deposits on the blades of the turbocharger turbine?
14 2401 A An examination of the piston compres
shiny face and bottom,
operating diesel engine, should app black back and top

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14 2404 D Following the failure of one turbocharger on a large, crosshead,
main propulsion diesel engine, fitted with multiple turbochargers,
which of the following actions should be taken prior to further
operation of the engine?
14 2411 C A bright shiny appearance of the sealing surfaces on diesel
engine compression rings indicates _____________.
14 2414 B Which of the listed adjustments must be made to a naturally
aspirated four-stroke/cycle diesel engine if a turbocharger is to be
installed?
14 2421 C Visual inspection of chrome-plated piston compression rings
reveals a black ring face at the position of the cylinder liner ports.
This condition indicates a ring whic ________________.
14 2431 A The face surface appearance of a shallow groove, stainless steel,
chrome plated compression ring should exhibit through its
operating life a ____________.

14 2434 C Which of the changes in the valve timing listed should be carried
out when a naturally aspirated four-stroke/cycle diesel engine is
converted to a supercharged engine?

14 2441 C When inspecting piston rings through the ports of a two-

stroke/cycle diesel engine, black areas on the sealing surfaces
are the result of ______________.
14 2444 A When a naturally aspirated four-stroke/cycle diesel engine is
converted for supercharging, which of the following changes
must be made to the valve timing?

14 2451 D Black areas on the sealing surfaces of piston rings indicate

_____________.
14 2454 D Which condition indicates the air side fouling of an aftercooler on
a turbocharged diesel engine?

14 2461 D If sludge accumulates on the underside of a diesel engine piston,

it will ______________.
14 2464 D Which of the following conditions can cause below normal air
pressure in the intake manifold of a turbocharged diesel engine?
14 2471 D Which of the conditions listed occurring in a diesel engine would
cause carbon deposits to develop in the piston ring belt?
14 2481 A Failure to remove the carbon ridge at the top of the cylinder when
removing a piston may result in ___________.
14 2484 C Which of the following problems can cause an above normal air
temperature to develop in the intake manifold of a turbocharged
and aftercooled diesel engine?
14 2491 B The best tool to use for removing the carbon ridge at the top of an
engine cylinder, prior to removing the piston, is to use

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14 2501 A To facilitate early ring seating of newly installed piston rings, while
still providing extended ring wear, __________.

14 2503 B In accordance with Coast Guard Regulations (46 CFR), which of

the listed starting aids is acceptable for use with the emergency
diesel generator?
14 2504 C If the turbocharger of a four-stroke/cycle diesel engine fails to
operate, which of the following statements best describes the
probable effect?
14 2505 B A substance found in residual fuels which tends to cause exhaust
valve corrosion and grooving, is ____________.
14 2506 C If a crankcase explosion occurs in a diesel engine, which of the
listed actions should be taken?

14 2511 B Which of the following statements is true regarding the

installation of piston rings on two-stroke/cycle, diesel engines as
compared to four-stroke/cycle, diesel engines?

14 2513 D Which of the following precautions must be taken if an electric

immersion heater is used to keep the coolant in a diesel engine
warm during the time the engine is secured?

14 2515 C The manufacturer of a particular diesel engine recommends when

running on heavy fuel for the vanadium content not to exceed 300
ppm. If there are 10 ounces of vanadium per 3125 pounds of fuel
just taken on board, which of the following statements is correct?
14 2516 C If a crankcase explosion occurs in a diesel engine, you should
stop the engine and _____________.

14 2521 B The service life of a worn aluminum piston for an auxiliary diesel,
for which no spares are readily available, can be extended by
____________.

14 2523 B Coast Guard Regulations (46 CFR) state that emergency diesel
generator starting systems must have sufficient capacity to
provide at least _____________.
14 2524 D If the turbocharger failed on an auxiliary diesel engine, which of
 the following conditions would probably occur?
14 2525 D The desirable properties of a marine fuel oil should include
_____________.
14 2526 A If a diesel engine has been stopped because of piston seizure
due to severe overheating, the crank _____________.

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14 2531 D Which of the following conditions can
High lubricating oil
piston lands? temperature
14 2533 C Which of the listed devices is the o Bayonet-type electrical
Guard Regulations (46 CFR), to easeoil heaters.
generator engines?
14 2534 A A sudden power loss from a turbochaturbocharger malfunction
engine is an indication of a/an ___ or failure
14 2535 B Heavy fuel oils generally have an upGlazing of the cylinder
0.1% by weight. Which of the followliners
expected if the ash content increases above this amount?
14 2536 D If a crankcase explosion has occurredThe cylinder indicator
crankcase remains intact, which of t cocks should be opened.
should be observed?

14 2541 D Excessive side clearance between a pexpand excessively

will cause the ring to ____________under operating
temperatures
14 2543 D Cold weather starting of a diesel en decreasing the
_____________. compression ratio

14 2544 D A thin film of oil on the lobes of a proper lubrication

_____________.
14 2545 D Corrosion and grooving on the bladicopper
turbocharger is caused by certain components of residual fuel
oils. These components are vanadium, sodium, and
14 2546 D If a crankcase explosion occurs in a piece #2 will move to the
the device shown in the illustration right

14 2551 B If the back clearance of a piston ringcompression pressure in

_____________. the cylinder will be higher

14 2553 D Starting a large low-speed propulsionincreasing the quantity of

during cold weather conditions, will starting air
14 2554 D Leaking oil seals on a diesel engine the engine to run after
_____________. the fuel has been
 secured
14 2555 D Burning fuel with a high sulfur conteincrease thermal
_____________. efficiency

14 2556 B What is the purpose of the device shoRegulate lube oil

pressure in a diesel
engine.
14 2561 C In certain cases, a cylinder liner can cylinder should be
replaced. When properly honed, th cleaned with kerosene

14 2563 A Jacket water heaters are used on die help the engine start
easier in cold weather
level

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14 2565 D Which of the following problems may
Injection lag
with a high sulphur content?
14 2571 B A properly honed diesel engine cylinprevent piston ring wear

14 2575 B The consistent burning of fuel oil witclogged fuel injection

diesel engine will result in _______ pumps
14 2584 D The large number of mechanical andscavenged air pump
developed in a diesel engine may da because it is designed
_____________. for steady state operation
rather than pulsating gas
load

14 2585 A The burning of fuel oil in a diesel corrosion and grooving

content, will cause ____________. of exhaust valves
14 2591 C Which of the following statements cUniformly excessive liner
in a single acting diesel engine is co wear will not cause wear
on the piston rings and
grooves.
14 2593 D Diesel engine starting difficulties duincrease in starting air
temperatures, can be overcome by uspressure
14 2594 C A turbocharged and aftercooled dies air in the hydraulic
to _____________. governor

14 2595 B The cetane number rates fuels for dieantiknock characteristics

14 2601 C Generally, where should you expect A
t djacent to the piston
of wear on a cylinder liner? skirt when the crank is
on TDC.
 14 2605 A In diesel engineering practice, the t cetane number
ignition quality of a particular fuel is _____________.
14 2611 D The rate of wear on a cylinder liner quality of air filtration
_____________.
14 2613 C When starting a diesel engine at temreduced by increasing
frictional resistance to turning wil lube oil pressure
14 2614 D Which of the following conditions ma
Decreasing scavenge air
turbocharger compressor inlet screenpressure.

14 2615 B The ignition quality of diesel fuel is octane number

______________.
14 2621 C A scored diesel engine cylinder line high firing pressure

14 2623 C Cold weather starting of a diesel enguse of low viscosity oil in

warm weather starting due to _____ cold weather

existing in the engine

during cold weather

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14 2624 B Why will a turbocharged diesel engiExhaust energy would
excessive additional load is applied draw excess air.

14 2625 D Which of the listed factors will indicViscosity

of a fuel to ignite in a diesel engine?
14 2631 B If the threads on the tappet screw pa replace part #14
illustration are worn, you should _____________.
14 2641 A If the manufacturer's instructions do 15372648
the following number progressions represent the best probable
order for tightening the head bolts shown in the illustration?
14 2643 D Starting aids, such as glow plugs, arelarge, direct drive diesel
_____________. engines

14 2645 D The cetane number of a diesel fuel oil

viscosity
14 2653 A Air motors used for starting some aux
vane motors
generally the type known as a/an ____________.
14 2655 A The cetane rating of diesel fuel is anignition quality of the fuel
14 2663 C The diesel engine starting motor shown
electric current
actuated by _____________.
14 2671 C Which of the following conditions coLeaking seal ring
 of a diesel engine cylinder head?
14 2673 B Fluid type starting motors used for stgear type
engines may either be of the piston type or the _____________.
14 2675 B The ignition quality of diesel fuel oilspecific gravity
14 2681 D To measure bearing clearances, a speusing a micrometer to
rod (plasti-gage) is placed between tdetermine the thickness
connecting rod bearing shell. The acof the crushed plastic rod
_____________.

14 2683 D Which of the listed devices is often Magneto

small and medium size diesel engines for the purpose of starting?
14 2685 A The ignition quality of a diesel fuel cetane number
14 2691 D To determine the main bearing clearatelescoping gauge
engine, you should measure the main bearing shell using a ball
anvil outside micrometer and measure the crankshaft journal
using a/an _____________.
14 2693 C Which internal combustion engine stJet flow
type fluid motor?

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14 2695 C Which of the following represents the
The cetane number has
cetane number? no affect on injection lag.

14 2701 C On a large low-speed main propulsiodial indicator

bearing wear is usually measured by using a/an ______.
14 2703 C An air starting motor for a diesel en an electric solenoid
overspeeding by _____________. interlock
14 2705 B The ignition quality of a fuel oil is indicates the amount of
consideration because it _________ abrasive material in the
fuel
14 2711 A Which of the devices is commonly uPlasti-gage
clearances between the main engine bearings and the
crankshaft?
14 2713 C In addition to a main engine driven sprovide air for engine
another air compressor, driven by a scavenging
installed to _____________.
14 2715 B Fuel oil having a low cetane rating cimproved cold weather
starting
14 2721 C To determine the main bearing clearaa depth micrometer
should use _____________.
14 2723 D The starting air supply for a diesel exhaust powered
by a/an _____________. turbocharger
14 2725 C Which of the following statements isThe cetane number
 number of diesel fuel? affects the amount of
injection lag.
14 2733 B Where is the charge for an air starti Air compressor
14 2735 D Which of the following statements isThe cetane number is
number rating of diesel fuel? obtained by comparing
the fuel with cetane, a
colorless liquid
hydrocarbon.
14 2741 A The insertion of shims between the fincreased compression
connecting rod and a bearing box woratio
14 2743 B Intercoolers installed on starting ai dust entering the high
possibility of ________________. pressure stage
14 2745 D The longer the ignition delay period less fuel will enter the
low cetane fuel, the ____________. cylinder
14 2751 C Which of the following operating coDecreased connecting
are removed from the joint between trod bearing clearance
diesel engine connecting rod and the bearing box?
14 2753 D A two-stroke/cycle diesel engine requi
has little or no internal
four-stroke/cycle diesel engine, of e friction
the two-stroke/cycle diesel engine _____________.
14 2755 A With respect to diesel fuel, the ease ignition quality of the fuel
start is dependent upon the _____________.

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14 2761 B Worn main bearings will cause the cincrease
auxiliary diesel engine to _____________.

14 2763 C Starting systems for large, low-speedhydraulic starting motor

propulsion diesel engines are usually _____________.
14 2765 B A mixture of 45% cetane and 55% alcetane number of 55
found to have the same ignition delay as a sample of diesel oil.
The sample can be described as having a/an __________.
14 2771 C In a large, low-speed diesel engine build up the piston crown
piston crown and cylinder head is foby metal spraying
to correct for this, you should ______________.
14 2773 C Which of the listed types of starting Electric
large, low-speed, direct reversing, main propulsion diesel
engines?
14 2780 A An acceptable method of measuring torque
fo wrench
force applied to the connecting rod and main bearing bolts, is to
use a _____________.
14 2781 A Which of the following relationship Higher compression
temperature developed in a combustiratios create higher
 compression ratio of the engine? temperature.
14 2783 C Which of the following statements isWhen starting, the air
starting valve, labeled "III", as shownstarting valve is held
open by air pressure.

14 2785 B Injection lag in a diesel engine ma a higher cetane number

of fuel oil
14 2791 C Abnormal crankpin bearing and piston
a restricted air intake
_____________.
14 2793 A Which of the following statements deThe valve will lift
characteristics of figure "B" in the il abruptly.
14 2795 A Diesel engine injection lag is caus compressibility of the fuel

14 2803 D The pilot valves in an air pilot start regulator valve

stroke/cycle, direct-reversing, main propulsion diesel engine are
operated by either a ported distributor disc or a/an
14 2805 C Fuel oil injected into the cylinder of increase engine power
piston passes top dead center, will _____________.
14 2811 C Diesel engine crankshaft deflection placed as near the
at four crank positions. Good engineecrankpin axis as possible
deflection gage or indicator to be ___________.
14 2813 B The four cams shown in the illustratiA
respective pistons at top dead center. Which of the cams is the air
starting cam?
14 2815 B Heat for igniting the fuel oil in the c electronic ignition system
generated by the _____________.

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14 2821 D One method of determining crankshalaying a straight edge
______________. across the crank webs at
the crankpin and
measuring the distance
to the crankpin in two
places
14 2823 C Cams used to activate mechanically oAbrupt lift with a short
on four-stroke/cycle diesel engines open period, and abrupt
valve lift profiles listed? valve seating.

14 2825 B The minimum fuel oil delivery pressu

degree of cylinder air
injection depends primarily on the turbulence
14 2831 C Which instrument is used to take craWeb deflection gage
14 2833 C The timing of diesel engine air startithe air start valve timing
 _____________. gears and rods
14 2840 B On an opposed-piston engine lower cLonger combustion
change which of the listed operatingevents.

14 2841 A Exhaust valve timing for the engine, 61°

s
to be set at 106° after top dead center. To what position should
the flywheel be rotated to set the exhaust valve timing on the #11
cylinder?
14 2843 D Diesel engine air start valve timing iengine operating speed
_____________.
14 2845 C In the cylinder of a diesel engine, fuespark from a plug in the
_____________. precombustion chamber
14 2851 B If there is a "clicking" sound in the a worn wrist pin
engine, the cause may be _____________.
14 2853 C During the starting of a diesel engin air starting control valve
prevented from backing into the air starting system, shown in the
illustration, by the _____________.
14 2861 C A loud clicking noise from the valv worn valve seats
diesel engine would indicate _____________.
14 2871 C Excessively worn, or polished ends oburned exhaust valves
spring, indicate ________________.
14 2873 C The items, shown in the illustration, water cooling valves
________________.
14 2881 B When a hydraulic valve lifter is on t valve spring
"zero" valve lash is maintained by the ______________.
14 2883 A What type of valve, shown in the illuAir start check valve
letter "I"?
14 2885 D Fuel oil day tanks for diesel engine sludge
cleaned at regular intervals in order to remove ___________.
14 2891 D Small cracks in the crankshaft bearincorrosion fretting
are an indication of _____________.
14 2893 B Which type of diesel engine air startDirect mechanical type
illustration?

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14 2895 B Which of the listed pumps, shown inBooster
t pump
directly to the fuel oil settling tanks of a diesel engine main
propulsion plant?
14 2901 A The trouble most commonly experienwear
part #7, shown in the illustration is _____________.
14 2903 C Which of the following methods is usHolding the valve open
compressed air through the diesel eng
for a long period
14 2905 D The depth of fuel oil in a tank is n vent line
 14 2911 B An eight cylinder, four stroke/cycle, 1689 kW
has a 650 mm bore and a 1400 mm stroke. What will be the
developed indicated metric horsepower if the average mean
effective pressure is 30 kg/cm2 at a speed of 100 RPM?
14 2913 B Starting air valves are held firmly oncam rollers on the
____________. camshaft

14 2915 D Fuel oil is regularly transferred to t allow impurities to settle

_____________. out of the fuel
14 2921 D Following an overhaul of a crossheadEnsure proper cylinder
engine is jacked over with the turning
lube oil flow.
procedure. Which of the listed pre-start procedures should be
carried out?
14 2923 B The valve shown in the illustration a rocker arm

14 2931 D If water is found in the crankcase of a cracked cylinder head

may be due to _____________.
14 2933 A A six-cylinder, four-stroke/cycle diesone-half engine speed
distributor type air starting system. The speed of the rotating
distributor disc is _____________.
14 2935 C Standby, or emergency diesel generasediment contamination
be kept full to reduce the possibility of __________.
14 2941 B How does water enter the crankcase Through the crankcase
exhauster.

14 2943 D An accumulator used in a hydraulic spump and the

located between the _____________compressor
14 2945 A The diesel engine shown in the illustE
pressure developed in the part labeled ____________.
14 2953 D The device used to store a charged preservoir
starting system is called the _____________.
14 2955 A Which of the listed contaminants wilSludge
from fuel oil by centrifuging?
14 2961 A Water accumulating in the crankcasea cracked cylinder liner
indicate _____________.
14 2963 B Which of the following statements isReservoir "A" maintains
starting system shown in the illustra pressure on the
accumulator "E".
minutes is required for
hand charging.

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14 2965 B One engine manufacturer recommends
flattening of the bowl
 be heated above 80°C to 95°C (176°neoprene O-rings
purification. This upper limit should be observed to ensure against
14 2971 C Excessive valve clearance will causeearly and close early
14 2973 A In a hydraulic starting system, oil t accumulator
the _____________.
14 2975 B On board supply vessels, a centrifugcooling water
14 2981 D What will cause valve stem blow-byA cracked lower spring
the illustration? plate.
14 2983 A The accumulator shown in the illustrhand pump
____________.
14 2985 A The most effective method in removin
centrifuging the fuel
is by _____________.
14 2991 A In a four-stroke/cycle diesel engine, crankcase pressure
increased _____________.
14 2993 A The diesel engine starter least likel hydraulic starting system
temperatures, is the _____________.
14 3001 C Diesel engine piston ring blow-by isback
ring clearance at the ring ____________.
14 3002 B During diesel engine warm-up, which
Mechanical
listed allows for the change in length of the exhaust valves?
14 3003 D Hydraulic starters are installed on mhydraulic starters are the
instead of comparable air start sys least expensive of all
starting systems

14 3004 D Which of the bearings listed below i Steel-lined

main and connecting rod bearings of a modern high-speed diesel
engine?
14 3005 A For optimum results, centrifugal purithroughput
should be accomplished with the fuel at the lowest practicable
14 3006 A Which of the tanks, shown in the illus
Light fuel oil service tank
emergency generator?
14 3011 D In a diesel engine, blow-by is generavalve guides
14 3012 C The valve stem expansion associate valve springs
allowed for by the ____________.
14 3014 D Which of the bearing types listed i Precision-type with shims
bearings in small internal combustion engines?
14 3015 D Heavy residual fuel oils are heated preduce fuel weight
_____________.
14 3021 C One cause of diesel engine piston r reduced scavenging

14 3024 B Bearing clearances in small high-spegage blocks

measured with _____________.
14 3025 A Which of the types of motors listed iPiston
14 3031 C Diesel engine "blow-by" into the craback clearance
excessive ring ____________.

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14 3032 A The valve bridge, illustrated, allow two exhaust valves to be
operated from one rocker
arm
14 3033 B Which type of motor listed is used asTurbine
14 3034 B The part labeled "F" shown in the illuconnecting rod cap
_____________.
14 3035 B A centrifuge will satisfactorily remo Gasoline
contaminants from fuel oil?
14 3042 B Which operating characteristic is indThe exhaust valves are
and hydraulic lash adjuster assemblyclosed by the action of
the bridge spring.

14 3043 B When an engine fitted with a hydrauli

the immediate increase
the starter is protected from the hig in hydraulic pressure
_____________.
14 3045 B If fuel oil were being discharged fro remove the discharge
fuel oil disk type centrifuge, operate ring
14 3051 B In a diesel engine, blow-by is a resu wrist pin bushings
leaking into the crankcase past the _____________.
14 3052 D Which of the following statements isBoth exhaust valves are
engine valve gear shown in the illustoperated simultaneously
from one rocker arm by a
valve bridge.
14 3053 B In a Bendix starter drive, the initia Bendix spring pressure
the flywheel ring gear is by _____________.
14 3054 D Which of the following mechanisms The
is camshaft rotates at
diesel engine shown in the illustrati the same speed as the
crankshaft.
14 3055 C A centrifugal fuel oil purifier shoul more sealing water is
_____________. needed
14 3061 B Diesel engine blow-by is the leakag oil rings only
the _____________.
14 3063 B In a starting motor equipped with a Bthe mechanical linkage
moves and meshes with the flywheel ring gear due to
14 3064 D The camshaft on a four-stroke/cycle fuel injectors
operate the _____________.
14 3065 C If the bowl of a disk type centrifuga oil has a tendency to
separator is not primed, the ______ emulsify in the bowl

14 3071 C In large, low-speed, main propulsiontop of the ring groove

groove wear usually occurs at the _____________.
14 3072 D Which of the following statements isBoth exhaust valves are
head and valve assembly of the diesel
oil cooled.
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14 3073 C The device used to engage a diesel eautomatic follow-up
flywheel ring gear is the _________ mechanism
14 3074 A Which of the mechanical operations The camshaft rotates at
about the standby diesel engine shown
one half the engine
speed.
14 3081 C A diesel engine cylinder head can craa leaking seal ring
_____________.
14 3082 C Which of the following statements isThe camshaft rotates at
diesel engine shown in the illustrati the same speed as the
crankshaft.

14 3083 C In the illustration, pieces #31 and # 872.72 RPM

respectively. In order to start the engine, the Bendix drive must
turn 3000 RPM. Therefore, the air motor assembly must rotate at
14 3084 A The use of push rods are necessary i the camshaft is located
_____________. some distance below the
rocker arms
14 3085 A If diesel fuel was discharging from t reprime the purifier
type centrifugal purifier operating as a separator you should
14 3091 D The ring lands on a large, low-speedinsufficient cylinder liner
engine piston may crack due to ___ wear
14 3092 A Which of the listed design features i Hard alloy steel
and NOT in an intake valve? construction
14 3093 D The Bendix drive on the starting moto 30
piece number ____________.
14 3094 A In an auxiliary diesel engine, the reaimprove skirt lubrication
skirt is to __________.
14 3095 C Which factor determines the ring dam
The viscosity of the fuel.
bowl type, centrifugal purifier?

14 3101 D Cracking of a diesel piston crown c excessive piston to liner

clearance

14 3102 C Many diesel engine exhaust valves aprovide added wear

hollow stems filled with sodium in protection against
today's corrosive quality
of fuel
14 3103 A Marine auxiliary diesel engine startehydraulic starting motors
are powered by an electric starting motor or _____________.
14 3104 A Which type of wrist pin uses bearings
Semi-floating
 fixed to the small end of the connecting rod?
14 3105 D Poor quality fuel being used in a t hard starting
diesel engine could result in ________________.

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14 3111 A If clearance between a piston and thealternation of side thrust
piston slap will occur. The slap itself is caused by
______________.
14 3112 A A built-up exhaust valve is one in the stem and heads are
made of different
material

14 3113 B The diesel engine starting motor, show

Bendix-drive
which of the following types of drive/clutch mechanisms?
14 3114 D Which of the following statements isThe piston has a heat
connecting rod and piston assembly sh
dam.

14 3115 B Brake specific fuel consumption is gDEMA

14 3121 B Which of the following statements cLiner wear is distributed
is true? equally between the
upper and lower
portions of the cylinder.
14 3122 C Valve rotators are commonly used onAir starting
engine cylinder head valves?
14 3124 C To reduce the weight of the reciprocaless piston slap and
speed engines are made considerablyquieter
s running
14 3125 D When comparing different fuels for di
the amount of lube oil
quality of diesel fuel oils becomes a additives increase
14 3131 C Scuffed cylinder liner surfaces in a starting the engine hot
______________.
14 3133 D The pinion of an electric starting moautomatic follow-up
engages the flywheel ring gear by a/an ____________.
14 3135 C The adverse effects of burning high sdispersant additives
compensated for by using a cylinder oil having sufficient
14 3141 C Wear is usually greatest at the top ofside thrust
engine due to the ____________.
14 3142 D A turbocharged, four-stroke/cycle dietemperature of the
overlap than a naturally aspirated, f exhaust gases
in order to increase the _____________.
14 3143 B Electric starting motors for diesel enrequire a generator as a
operation and _____________. source of power

14 3144 B Piston cooling fins are located ___ atop the piston crown
 14 3151 C If the oil scraper ring drain hole in a blow-by will decrease
becomes plugged, _____________.

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14 3152 B The exhaust ports shown in the illustration are identified with the
letter "____".
14 3153 D Auxiliary diesel engine electric starting motors use
____________.
14 3154 B Many cast iron pistons are designed with heat dams, which serve
to _____________.

14 3161 C If the piston groove drain holes for the oil control rings become
clogged, which of the following is likely to occur?

14 3162 B The size of the exhaust valve opening is ____________.

14 3163 D Diesel engine electric starting motors generally require heavier

duty motors and operate at higher voltages than comparable
starting motors for gasoline engines due to _____________.
14 3165 D Heavy fuel oil used in the system show in the illustration, will have
the lowest viscosity ____________.
14 3171 B If the compression rings on a diesel engine piston become stuck
in the ring groove, the cause may be ______________.
14 3172 C Exhaust valve openings in a diesel engine cylinder head are
made as large as practical to _____________.

14 3173 D Electric starting motors for diesel engines require high current for
their operation. As a result of this, t ______________.

14 3174 A Cold clearances between the skirt of an aluminum piston and the
cylinder liner is about ______________.

14 3181 A Improperly fitted piston rings in a diesel engine can cause

_____________.
14 3182 D Exhaust gases are generally removed from the cylinders of a two-
stroke/cycle diesel engine by ______________.
14 3183 B When piloted by a small amount of control air, the pneumatic
relay valves, shown in the illustration, will provide a large flow of
 air from a separate source. The flow will stop when the control
pressure is vented through the port numbered ____________.
14 3184 D The part labeled "E", as shown in the illustration, is the
________.
14 3191 D Diesel engine piston seizure can be caused by _________.

14 3192 D In the cylinder head of a two-stroke/cycle diesel engine, valves

are used for _____________.
14 3193 B A six-cylinder, two-stroke/cycle diesel engine is fitted with a rotary
distributing air starting system. The speed of the rotating
distributor disc is ____________.

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14 3194 B The part labeled "G", as shown in thebearing shell
_____________.
14 3201 A Incomplete combustion in a running residual carbon deposits
piston rings to become stuck as a result of _____________.
14 3202 D The exhaust system for a turbochargedischarge exhaust gases
engine functions to _____________.and smoke
14 3204 B One end of a diesel engine cylinder icrankcase
head and the other end by the _____________.
14 3211 D A sudden drop in compression pressua leaking fuel injector
diesel engine can be caused by ___ nozzle
14 3212 D The most common instrument used to
pyrometer
exhaust pressure is the _____________.
14 3213 B In the main engine starting control a vertical drive shaft (1)
illustration, the roller of the starting changes the direction of
with the base circle of the starting c rotation
position, the "valve opening pipe (J)" is connected to the
"discharge space (D)" and the "valve closing pipe (H)" with that of
the "distribution space (F)." The result of this arrangement is that
the ____________.

14 3214 A In a two-stroke/cycle, opposed pistonallow the exhaust ports

crankshaft operates several crank anto open and close before
crankshaft to _____________. the inlet ports close

14 3221 C Low compression in a diesel engine worn or broken cylinder

________________. liner sealing rings
14 3222 B When monitoring diesel engine perf dwell-tachometer
instrument to use is the _____________.
14 3223 C Which of the following statements isDuring starting, the
starting system shown in the illustra starting valve is held
 opened by air pressure.

14 3224 B The difference in crank lead betwee receive less power than
of an opposed piston engine causes tthe upper shaft
14 3225 D In an opposed piston engine, which The exhaust ports would
happen if the lower crank lead were open before the
scavenging ports.
14 3231 A Worn main bearings in a diesel engindecreased compression
pressure
14 3232 C A pyrometer is an instrument commocylinder pressure
_____________.
14 3233 A Which of the following statements deThe valve will lift
characteristics of figure "B" shown inabruptly, and reseat
gradually.
14 3234 A During the power stroke of a four-strpiston skirt
most of the side thrust of a trunk-type piston is absorbed by the
14 3241 A Low compression pressure in a dieseimproperly seating intake
_____________. valves

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14 3242 A A pyrometer is an instrument used t exhaust
the diesel engine _____________.
14 3243 C Which of the following statements bThe valve spring exerts
starting valve, shown in the illustrat downward force on the
starting air to the main engine cylin valve spindle.

14 3251 B Low compression pressure in a dieselow water in the

___________. expansion tank
14 3252 C Thermocouple pyrometers are used ocooling water leaving
diesel engines to indicate the tempe each cylinder
14 3253 B The admission valve, shown in the illu
vacuum on the control
supply manifold for opening and closvalve outlet
compressed air to the starting valves, as well as air distribution to
the main propulsion diesel engine. The admission valve is
opened by ____________.
14 3254 B A connecting rod in a four-stroke/cyctension load twice each
____________. crankshaft revolution

14 3261 D Low compression pressure in a diesecarbon deposits in the

______________. combustion space
14 3262 A Exhaust gas pyrometers are useful detecting faulty
combustion in individual
 cylinders
14 3263 B When the quick acting valve to admitprevent
s damage to the
motor is activated, the valve should air line lubricator
14 3271 B Low compression pressure in a dieselinsufficient fuel supply
of ______________. due to fuel pump valves
sticking or leaking

14 3272 C For a diesel engine, individual cyl chemical analysis

determined by exhaust gas _____________.
14 3273 C Diesel engine air start system check an air start cam
_____________.
14 3274 A In a four-stroke/cycle diesel engine before TDC and close
_______. after BDC
14 3281 B Low compression in a diesel engine clogged coolant
______________. passages
14 3282 C Pyrometers commonly found on diese
pyrostats and a voltmeter
consist of ______________.

14 3283 B In a direct cylinder admission air st the starting air pressure

begins to fire, the air starting check valve illustrated, is closed by
14 3284 A Excessive valve lash in an auxiliary later and close sooner
valves to open _____________.
14 3291 A The loss of the diesel engine cylindeLow compression
valves, piston rings, worn or scored pressure and high
which of the following sets of condi exhaust temperature

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14 3292 D Which of the general advantages listeWhen heated, it will
pyrometer have over the mechanicalmove proportional to the
amount the metal has
lengthened or expanded.
14 3293 C When an air started, four-stroke/cyclintake stroke
cranked, the starting air is admitted to each cylinder during what
would normally be the _____________.
14 3301 D Which of the listed problems can be Clogged air filter
pressure in a diesel engine?
14 3302 C Which of the diesel engine exhaust mu
A wet-type exhaust
equipped with a spark arrestor? muffler
14 3304 B When the cold valve lash is less thanopen later than normal
manufacturer, diesel engine valves, operating at normal
temperatures, will ______________.
14 3311 B Low cylinder compression pressure early fuel injection timing
temperature may indicate ______________.
 14 3312 B A dry-type spark arrestor removes spincreasing the linear
exhaust by _____________. velocity of the exhaust
gases
14 3313 A If a four-stroke/cycle diesel engine ison the power stroke
the cylinders, the pistons receiving the charge of starting air must
be _____________.
14 3314 C If the valve lash on a diesel engine i Too little lash will cause
following statements represents the noisy operation and
can develop? excessive wear.

14 3321 D A drop in compression pressure in ona leaking fuel injection

can be caused by _____________. nozzle
14 3323 D In a medium-speed marine propulsiooperation is under higher
direct air starting valves, the cylindecompression
fire first because the ____________.

14 3324 A If you increase the clearance betweeValve will open later.

arm, which of the listed conditions will occur?
14 3332 C Wet-type exhaust silencers, used witThe silencer is equipped
which of the following design featu with a water seal.

14 3333 C An eight cylinder, air started, two-st each upper cylinder head
marine diesel engine can be started equipped with reversible
only if it has ____________. air start valves
14 3334 B Reducing the clearance between a vahaving a shorter duration
result in the valve _____________. of opening
14 3341 B Which of the listed conditions can c High sulphur content fuel
on a piston skirt?
14 3342 C In accordance with Coast Guard RegThey must be fitted with
regarding internal combustion engina backfire flame arrester
installations, which of the following constructed in
accordance with the
specification
regulations.

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14 3343 B A large two-stroke/cycle direct reverline up the engine for
reversed. Prior to the admission of s restarting with light diesel
____________. oil
14 3344 D The procedure of adjusting the valvemechanically adjusting
mechanism illustrated is by _______the valve at point "D"
 14 3350 B Which operating condition of a dieseOverspeeding
excessive firing pressures?
14 3351 A In a diesel engine, after ignition of t volume
piston reaches TDC, there is little change in the cylinder
14 3352 A Coast Guard regulations (46 CFR) reterminate above the
exhaust pipe from a diesel engine deepest load waterline
14 3353 A Which of the routine maintenance pro
Frequent draining of
for starting air receivers? accumulated moisture.

14 3354 D If you were inspecting the valve spria glazed surface on the
engine, your best indication of impe spring
14 3361 B Which of the conditions listed could Plugged injector nozzles
valves on a large, low-speed, propulsion diesel engine to lift?
14 3362 D The exhaust system of a diesel enginprovide exhaust back
remove exhaust gases and to _____ pressure
14 3363 B When the solenoid of a Bendix driveplunger
t draws the
operating the starter switch, the __ flywheel ring gear into
the drive position

14 3364 A Worn cylinder head valve seats in a less cold valve lash
____________.

14 3371 C Which of the following reasons repr Compression must be

compression ratio of a gasoline enginlow for effective spark
diesel engine? ignition.

14 3372 D The diesel engine shown in the illustA

is indicated by the letter _____.
14 3373 C In some Bendix drive electric starti action of the overrunning
of the pinion gear being engaged witclutch
the ____________.
14 3374 B Which of the following operations wiamount of scavenge air
rate of wear in a cylinder liner ___ to the cylinder
14 3381 A If the relief valve on a diesel engine liquid in the cylinder
be due to _____________.
14 3382 C Which of the listed characteristics Both mufflers contain
type diesel engine exhaust mufflers?moving parts.
14 3384 D Scuffed cylinder liner wearing surfacchromium plating piston
result from _____________. rings
14 3391 B An increase in crankcase pressure geworn connecting rod
_____________. bearings

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 14 3392 C Exhaust pipes for separate diesel e space limitations prevent
when _____________. separately run pipes

14 3394 C Scuffed cylinder liner wearing surfacstarting the engine while

result from _____________. hot
14 3401 C A substantial increase in crankcase excessive lube oil
indication of _____________. pressure
14 3402 C Marine diesel engine dry-type muffl using phase adjusters
__________.

14 3403 A Which of the following operating chaHelps absorb the shock

drive friction clutch is associated wi when the pinion engages
the ring gear.
14 3404 D You are inspecting the lower main prlarge dirt particles in the
engine. You observe that about half th
oil supply
a milky white color. This condition is caused by _____________.
14 3411 D An increase in diesel engine crankcacompression pressure
indicates excessive _____________.
14 3412 A A water jacket is placed around the reduce heat radiation to
propulsion diesel engines to ______ the engine room

14 3413 A For a diesel engine, which of the fo 30 seconds

represents the longest period the electric starter motor may be
operated continuously?
14 3414 B Bearing clearances in small high-spegage blocks
measured using _____________.
14 3421 A A substantial increase in crankcase worn cylinder liner
indication of a/an _____________.
14 3422 D Diesel engine mufflers reduce nois packing muffler
chambers
14 3423 C The accumulator shown in the illustrpump "F" only
_____________.
14 3424 D When a piston is removed from a diescoring
the piston should be examined for ___________.
14 3431 C If a diesel engine were running at stop the engine
exhaust, you should _____________immediately to prevent
damage
14 3432 D Diesel engine mufflers or silencers passing the exhaust
noise by ________________. through long head pipes

14 3433 A The hydraulic starting motor is oper accumulator

under pressure from the _____________.
14 3434 A Failure to remove the carbon ridge frdamaged upper piston
when replacing the piston rings, wil rings and/or ring lands
14 3441 D The most practical way of detecting check the cylinder
an operating large, low-speed, main pexhausts for black
_____________. smoke

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14 3443 A The purpose of the engine-driven hymaintain pressure in the
engine hydraulic starting system is accumulator

14 3444 C To reduce load during jacking operatiFuel line

devices should be opened?
14 3451 B An indication of an overloaded mainwhite smoke in the
_____________. exhaust
14 3452 A Diesel engine mufflers accomplish nreducing exhaust gas
______________. velocity
14 3453 C As soon as a diesel engine has starteExhaust temperatures
operating parameters should be checked FIRST?
14 3454 C When a diesel engine compression prcylinder exhaust ports
indicator is connected to the _____________.
14 3461 B In a diesel engine exhaust system, thincreased engine back
gases below their dew point, will re pressure

14 3462 D The exhaust system for a diesel engipower the Roots-type

remove exhaust gases and to _____ exhauster

14 3463 C The starter control valve in the hydr drain the reservoir
illustration is malfunctioning. Before removing the valve, you
must first ________.
14 3464 C The instrument shown in the illustratmeasure concentration
to ____________. of chromate in jacket
water
14 3471 C Misfiring in a diesel engine at light high lube oil temperature
____________.
14 3472 A Diesel engine exhaust noise can be rchanging the direction of
muffler by _____________. exhaust gas flow
14 3473 D Before any diesel engine hydraulic splace all control levers in
servicing or repair, you must _____ the "HOLD" position

14 3474 C An auxiliary diesel engine may fail tlow exhaust back

_____________. pressure
14 3481 B A condition contributing to diesel eng
gap
the ring grooves, is insufficient ring clearance at the ring
14 3482 C One of the purposes for water coolinreduce lube oil
marine diesel engine is to ________ temperature
14 3484 B If a diesel engine driving a generatorexcessive compression
fire properly, the cause could be _ pressure
14 3490 C In a two-stroke/cycle diesel engine, exhaust manifold
expelled from the cylinder by the ______________.
14 3491 C When the normal compression ratio of
overloading the engine
high, misfiring at light loads may be caused by _____________.
14 3492 B If the jacket water temperature rises call the chief engineer
diesel engine, you should FIRST __________.

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14 3493 D The air start timing in the system shotightening spring II
advanced by ____________.
14 3494 C In an opposed piston engine, the termone crankshaft turning
_____________. faster than the other

14 3501 C Which of the listed diesel engine systLubrication

problem of a cylinder regularly misfiring?
14 3502 A During the valve overlap period, the effective cylinder
turbocharged, four-stroke/cycle dies scavenging and cooling
the intake manifold pressure to ensure ___________.
14 3504 C Which of the listed conditions will reSupplying high
auxiliary diesel engine to shut down temperature inlet air.
14 3506 A The turbocharger diffuser shown in th
"D"
the part labeled ____________.
14 3511 C The instrument shown in the illustra measure exhaust
engine to _____________. manifold pressure
14 3513 A Which of the following problems canCorrosion and eventual
drain off condensate from a starting failure of the tank.

14 3514 C If a diesel engine continues to run aftincandescent carbon

down, the probable cause is ______ particles
14 3516 A Regarding the turbocharger shown inDt
section is indicated by the letter _____________.
14 3521 A A diesel engine experiences a suddenengine overload
accompanied by black exhaust smoke, with the fuel rack at
maximum, and the speed remaining below normal. The probable
cause is ____________.
14 3522 D From the engine data shown in the ill830°F + or - 5°F
of every cylinder was 870°F + or - 5°F, you would expect the
exhaust temperature at the turbocharger inlet to be
14 3523 C Which of the following conditions isFlywheel will be
electric starter motor pinion gear fa damaged
flywheel of a diesel engine after the engine has started?
14 3524 C If the auxiliary diesel engine will no high lube oil pressure
be _____________.
14 3526 C Regarding the turbocharger shown inexhaust
t manifold
labeled "B" would be attached to the ________________.
 14 3530 A Which of the listed items should be Electric power and
any maintenance on a solenoid operatstarting air

14 3531 B Bouncing of the valve gear in a dies prolonged high speed

_____________. operation

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14 3532 D The exhaust gases in a supercharged
engine are expelled from the cylind
14 3533 D A diesel engine cranks properly duri
stalls. Which of the following systems is most likely at fault?
14 3534 B If an auxiliary diesel engine frequent
caused by _____________.
14 3536 B Regarding the turbocharger shown in t
labeled "F" is a ________.
14 3541 B Spring surge in diesel engine valve s
_____________.
14 3542 C The satisfactory operation of diesel
depends on ______________.
14 3543 C A large low-speed main propulsion e
one cylinder secured. When the engi
cylinder ended in a position prevent
restarted. Which of the following actions should be taken to
correct the situation?
14 3544 A An operating diesel engine that sudde
a/an _____________.
14 3545 A During unsafe firing conditions in a
boiler, various control actuators are interlocked with the burner
circuit to prevent start-up, in addition to safety shutdown. These
controls are referred to as ____________.
14 3546 B In the turbocharger shown in the illu
connected to the part labeled _____________.
14 3551 C If it becomes necessary to cutout an
low-speed, main propulsion diesel eng
should be secured and its ________

14 3552 D In the operating cycle of a four-stro

blowdown to exhaust manifold pressure must occur before the
piston begins the exhaust stroke to avoid _____________.
14 3553 A If a diesel engine turned over freely b
could be _____________.
14 3554 A A four-stroke, cycle, turbocharged,
 engine has been operating under load. The load suddenly
increases, causing excessive black exhaust smoke, and a rapid
rise in the lube oil temperature. In response to this condition, you
should ____________.
14 3556 A Which of the operating characteristic
turbocharger shown in the illustratio

14 3561 D Which of the following procedures s

large, low-speed, diesel engine is op
secured?
increased.

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14 3563 A A diesel engine could fail to start incorrect injection timing

14 3564 C Excessive vibration in an operating electrical overload

caused by _____________.
14 3566 C The device shown in the illustration provide cooling water
_____________. circulation through the
engine
14 3571 D A bronze bearing liner with a lead-tiproper break-in wear
color over most of its surface and some areas of exposed bronze.
The white coloring indicates _____________.
14 3572 D In a diesel engine, with the valves sepoint of opening
of the cam determines the valve _____________.
14 3573 C If a diesel engine turned over at nor excessive fuel pressure
to start, the cause could be late fuel injection or _____________.
14 3574 D Irregular engine speed in a diesel g high generator load
_____________.
14 3576 B The impeller shown in the illustrati air
___________.
14 3581 C Water accumulation in the cylinder osoft water pump was not
indication that the _____________. secured along with the
engine
14 3582 B Which of the following statements reThe exhaust valves are
valve bridge and hydraulic lash adjuopened by the action of
illustration? the bridge spring.

14 3583 D When restarting a heavy fuel diesel increase the starting air
for some time, the engineer should pressure
14 3584 C If you notice smoke coming from thea cracked cylinder liner
outlet of an operating diesel engine, you would suspect
 14 3586 D In a main propulsion turbocharged digovernor droop
turbocharger varies according to the _____________.
14 3591 D If water is ejected from an open ind injector insert bushing
rotated by the turning motor, a leak may have occurred at the
14 3593 D A four-stroke/cycle, 1000 horsepower
glazed liners or pistons
normal cranking speed with normal fuel pressure and ambient
temperature. The reason for the failure could be
14 3594 D If a clicking sound is being produce a loose valve stem and
compartment of a diesel engine, th guide
14 3596 B The operating speed of a turbochargeengine speed
14 3601 D The bore of a diesel engine describ length of the piston rod

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14 3602 D Which of the listed construction characteristics is apparent of the
diesel engine shown in the illustration?

14 3603 D The starting air rotates a diesel engine at the proper speed, but
the engine fails to start. You should check _____________.
14 3604 C A loud clicking noise occurring from within the valve compartment
of an operating diesel engine would indicate _____________.
14 3606 B The speed of the turbocharger for a four-stroke/cycle diesel
engine driving a generator at constant speed depends on the
14 3611 D The cubic inch (or liter) displacement of a cylinder is determined
by the diameter of the piston and the_____________.
14 3612 B The intake ports of a two-stroke/cycle diesel engine are opened
and closed by the action of the _____________.
14 3613 C When attempting to start a main propulsion diesel engine, the
engine turns at the proper speed but will not start. You should
check the _____________.
14 3614 A If a valve seat insert, similar to the that shown in the illustration is
cracked, this may be indicated by _________.

14 3616 B At rated engine load and RPM, the diesel engine turbocharger is
powered by _____________.
14 3621 D During the compression stroke in a four-stroke/cycle, diesel
engine, assume that the piston can only travel seven-eighths of
the total distance between BDC to the underside of the cylinder
head. Which of the following ratios will be the compression ratio
for this engine?

14 3622 C Exhaust gases in a two-stroke/cycle the air valves

through _____________.
14 3623 D If an auxiliary diesel engine equippedlow lube oil viscosity
 system cranks very slowly after repeated attempts to start, the
cause could be a/an ____________.
14 3624 D When checking the underside of the worn valve locks
illustration, you find localized black patches. You should suspect
14 3631 B A turbocharged, eight cylinder, two-s5160.31 cubic inches;
has a swept volume of 5160.31 cubic14.92:1
10 inch stroke, and a compression ratio of 14.5:1. If during an
overhaul, the cylinder heads have to be trued by milling off .024
inches, what will be the resultant swept volume and compression
ratio?

14 3632 A The exhaust ports shown in the illust#3

in figure __________.
14 3633 C Which of the listed diesel engine sta Direct cylinder admission
susceptible to difficulties in cold we air start
14 3634 B The average pressure exerted on a p indicated horsepower
stroke is termed _____________.
14 3636 B If the speed of a turbocharged dieseldecrease until the engine
constant as the load on the engine is speed increases
turbocharger will _____________.

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14 3641 B (Piston area) X (Piston stroke) X (numbers of the cylinders) =
engine _____________.
14 3642 C Valves in the cylinder head of a diesel engine are opened by the
direct action of the _____________.
14 3643 D If a diesel engine, with an electric starter, cranks very slowly after
repeated attempts to start, the cause could be _____________.
14 3644 C Which of the listed conditions will affect the mean effective
pressure the most in the cylinders of a diesel engine?
14 3646 D An increase in power output of a turbocharged diesel engine
operating at a constant engine speed results in _____________.
14 3651 B Engine displacement is equal to piston _____________.

14 3703 A If cranking a diesel engine is too slow while attempting to start, it

will result in _____________.
14 3711 A Most practical diesel engines today operate on a cycle which is a
combination of the Diesel and Otto cycles. In this process,
compression ignition _____________.
14 3712 B The valve spring shown in the illustration, functions to
_____________.
14 3713 B If while attempting to start a diesel engine, the cranking speed is
 too low, _____________.

14 3714 C The engine shown in the illustration is a _____________.

14 3721 D In the theoretical diesel cycle, shown in the illustration, which of

the listed conditions normally takes place between points "3" and
"4"?
14 3722 A The force exerted by a valve spring to close the diesel engine
valves, is proportional to _____________.
14 3723 C If a diesel engine rotates slowly when cranked, but does not fire,
the ___________________.

14 3724 B If all other conditions such as bore, stroke, speed, and mean
effective pressures are equal, a two-stroke/cycle diesel engine
will develop approximately _____________.
14 3731 C In the pressure-volume diagram, shown in the illustration, the
volume line is divided into 16 units _____________.
14 3733 A A diesel engine may be hard to start if the _____________.

14 3734 C A disadvantage of a four-stroke/cycle diesel engine is

_____________.

14 3741 A In the pressure-volume diagram, shown in the illustration, what is

indicated to have occurred by the line connecting points "d" and
"e"?

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14 3742 C The formation of carbon monoxide inspraying water into the
reduced by ____________. exhaust pipe

14 3743 D Which of the listed failures, occurri Low cooling water outlet
generator system, should cause an autemperature
room control station?
14 3744 B Compared to four-stroke/cycle engine
less even torque
engines have the disadvantage of _____________.
14 3751 C In the pressure-volume diagram, show
The exhaust valve
occurs between points "e" and "f"? closes.
14 3752 D A large, low-speed, main propulsion rain water coming down
designed to drain off ___________. the stack

14 3753 A Which of the following effects will The engine will crank
on the operation of a diesel engine? slowly and may fail to
 start.
14 3754 D In comparing engines of equal horseopposed-piston engine
temperatures occur in a/an _____________.
14 3761 B If point #1 in the ideal cycle diagramOtto
the compression stroke, which of the cycles listed is
demonstrated?
14 3762 B Decreasing the exhaust valve clearanearlier and have less lift
cause the exhaust valve to open ______________.
14 3763 A On a diesel engine with direct-cylindan overheated starting
leaking air starting valve would be air supply pipe
14 3861 D A disadvantage of a two-stroke/cyclemore power strokes per
___________. revolution

14 3862 B A restricted diesel engine exhaust m low firing pressures and

normal load is indicated by ______ low exhaust
temperatures
14 3863 A What could be the cause of inadequatHigh lube oil viscosity
cranking of a cold diesel engine?
14 3871 A In a single acting, two-stroke/cycle, once every crankshaft
impulse in an individual cylinder o revolution
14 3872 D Excessive exhaust temperatures in a high injection pressure
engine can be caused by a/an ____________.
14 3873 C A diesel engine is turned at normal low lube oil temperature
ignition occurs. This could be the result of _____________.
14 3874 B High-speed, multi-cylinder, diesel prevent bearing loads
counterweights placed opposite to the crankpins to ________.

14 3881 A The #3 piston shown in the illustratiointake stroke

______________.
14 3882 B A dry-type exhaust silencer clogged low exhaust temperature
14 3883 C A two-stroke/cycle diesel engine oper
Improper governor
overspeeds, and fails to restart whe operation due to excess
Which of the following problems is toil pressure
engine failing to restart?

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14 3884 A If an auxiliary diesel engine will not
the trouble may be in the ____________.
14 3891 C In the chart shown in the illustration
has the #9 piston on top dead center; therefore, the #1 piston is
on _____________.
14 3892 D Clogged or partially obstructed exhau
can cause _____________.
 14 3893 C A diesel engine fails to start, even t
but not cranked over. The probable cause is _______.
14 3894 D If you observe smoke coming from th
auxiliary diesel engine, you should
14 3901 C Which of the following notations doe
formula shown below? IHP= PLAN/(33000)

14 3902 D Partially obstructed exhaust ports on

_____________.
14 3903 C When starting air is admitted, a dies
slowly without firing. The cause m
14 3911 B When the #1 piston, shown in the illus
center, the #9 piston is ____________.
14 3912 A An accumulation of carbon on one of
exhaust gas pyrometer will ______

14 3921 C A piston is at bottom dead center wh

14 3922 B If carbon accumulates on a pyromete

_____________.
14 3931 D A piston is said to be at top dead cen
_______________.
14 4065 D The diesel engine combustion chambe
illustration is a/an _________.
14 4071 D Using the information given in the il
cylinders listed will fire next?
14 4072 D Black smoke exhausting from a dies
_____________.
14 4075 D Open combustion chambers are desi

14 4081 C The angular distance a flywheel rotat

cylinders of a V-16, four-stroke/cycle diesel engine is
14 4082 B Engine operating conditions may be i
exhaust smoke. Black smoke could
14 4085 D The primary purpose of the open co
diesel engines is to _____________.
14 4091 D From the engine data given, after cy
degrees of crankshaft rotation must take place before #4L
cylinder fires?
14 4092 C Black smoke exhausting from a diese

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 United States Coast Guard
14 4095 B Many diesel engines have pistons widecrease air turbulence
_____________. and improve fuel mixing
14 4101 B How many crank angle degrees of ro60‚
firing of the cylinders indicated by the illustrated chart?
14 4102 B What color exhaust will be exhibite White
stroke/cycle main propulsion diesel engine, designed to operate
on light and heavy fuel oil, is operated on insufficiently preheated
heavy fuel oil?
14 4105 C Which of the following types of eng Horizontal opposed
chamber located between a cylinder head and the crown of a
piston?
14 4111 D A four-stroke/cycle six cylinder in-liat top dead center
order of 153624. When cylinder #6 is firing at top dead center,
piston #4 is ____________.
14 4112 A A dark exhaust from a running dieselate ignition
_____________.
14 4115 C Turbulence in the combustion chambe
delayed ignition
induced by _____________.
14 4120 C In a single-acting diesel engine, the cmajor thrust side
most difficult to lubricate is the ______________.
14 4121 B When inspecting pistons, liners, and faulty piston lubricator
stroke/cycle diesel engine through the cylinder ports, a wet piston
crown would indicate a ____________.
14 4122 A Which of the events listed does NOTIntake
piston just reaches top dead center?
14 4125 A The greatest turbulence in a diesel e shape of the combustion
the _____________. chamber
14 4130 D After removing an old set of rings, Improper lubrication
conditions is indicated if a bright spot is found on each end of a
broken piston ring?
14 4131 A In describing engine operation, wha The sequence of events
that produce a power
pulse.
14 4262 A High exhaust temperatures from all oinoperative turbocharger
turbocharged, four-stroke/cycle diesel engine can be caused by
an _____________.
14 4272 B In a multi-cylinder, constant pressur combined exhaust
engine, the combined exhaust temperpyrometer is defective
inlet reads higher than the individual cylinder exhausts. This
means the _____________.
14 4372 C You are operating a 16-cylinder diesReduce engine load.
turning 900 RPM. All exhaust temperatures are between 900°F
and 950°F, except the #3 cylinder, with an indicated reading of
750°F. All fuel rack settings are between 21 and 22 millimeters,
with the exception of a 17 millimeter setting for the #3 cylinder.
Which of the following corrections should be carried out?
14 4555 A Combustion knock will most likely oc
low ignition quality
with _____________.
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14 4764 C Which of the following statements concerning the marine type
reversing reduction gear set shown in the illustration is correct?

14 7411 C When checking for the presence of sulfite in the feedwater of an

auxiliary boiler, you are in essence ____________.

14 7758 A If the load on a diesel engine equipped with an isochronous

hydraulic governor is increased, after compensation is performed
by the governor, the engine speed will __________.
14 16872 A Which of the listed fuel oil ignition methods are commonly found
on automatically fired auxiliary boilers aboard merchant vessels?
14 30972 D What method is used to supply air to the cylinders of the diesel
engine illustrated?
14 30999 B The main source of fuel injection system malfunctions is
14 31035 D The flash chamber attached to the auxiliary boiler illustrated,
____________.
14 31197 C To test the operation of the flame failure switch of an operating
automatically fired auxiliary boiler, you should _____________.

14 31200 C Which of the listed devices could be used as a ring groove

cleaning tool during preparation for the installation of new rings?
14 31201 C On auxiliary boilers using individual flame scanners to monitor
the main and pilot flames, the main flame scanner should be
sighted to ______________.
14 31220 D The shape of a cam on a diesel engine determines the valve's
__________.

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 Marine Engineer Exam Questions
Choice A Choice B Choice C
overlap crush lap or lead

At the shell At or near the center of In the furnace

approximately 1 1/2 the crown sheet of the approximately 1 1/2
inches (3.8 cm) below combustion chamber. inches (3.8 cm) below
the normal waterline. the normal waterline.
ball anvil micrometer pair of outside calipers pair of inside calipers
and a dial indicator
dial indicating outside telescoping gauge ball anvil outside
caliper micrometer

dial indicating outside spider gauge ball anvil outside

caliper micrometer
339.29 RPM 96.51 RPM 267.86 RPM

worn main bearing torsional stress slack thrust bearings

journals deformation
have a viscosity index have a flash point of not have a flash point of not
number greater than 100 greater than 200°F less than 315°F

the action of a spring rotation of the starting the higher rotating speed
cam of the flywheel
Drain the accumulated Test the relief valves. Watch the temperature
moisture. to prevent fluctuations in
pressure.
ball-check valves to automatically closed by a connected through the
prevent leakage solenoid tank top

dry sump system wet sump system shunt system

111.63 RPM 66.67 RPM 460.47 RPM

decrease the engine increase the engine engage the ahead clutch
speed speed
 Marine Engineer Exam Questions
the beveled edges of the intake valves utilize the volume of air passing
intake valves provide for stellite-coated valve seat through intake valves is
self-centering during inserts which reduce less than the volume of
seating wear air passing through
exhaust valves
provide a means of warn the engineer of low cool the crown sheet at
draining the boiler water level high firing rates
react with insufficient fail to react to small have excessive
speed droop speed changes sensitivity to small speed
changes
the speeder spring the speed droop lever the compensating lever
tension is changed fulcrum is changed fulcrum is changed
rotating the load limit lowering the pilot valve raising the actuating
cam plunger compensation piston
Roller Sleeve Precision insert

self-closing gate valves operated electrically connected through the

tank top

Splash lubrication Pressure lubrication Sight feed lubricators

two position differential proportional action proportional plus reset

gap action action
rapid wear on the damage to the stroke rapid wear on the
crosshead adjustment arm plunger packing
intake and exhaust scavenging poppets fuel valves
valves
right hand end of the speeder rod will move pilot valve plunger will
floating lever will move down move down
up
pilot valve opening compensating needle compensating spring
valve tension

force the thrust bearing change the speed of the change the amount of
down on the flyweight rotating bushing stroke available to the
toes actuating compensating
piston
tachometer torsion meter dynamometer

Piston pin bushing Turbo-generator turbine Spring bearing

bearing
of the flareless nonbite silver soldered have welded flanges
type

all of the oil used by the some of the oil used by some of the oil used by
engine through a filter the engine through a the engine through a
filter centrifuge
Marine Engineer Exam Questions
The engine will The shutdown servo The safeguard provided
automatically stop, motor will develop a by these devices will
although there will be no force overriding the the result in a temporary
difficulty in restarting the output of the governor, cessation of air flow
engine. causing in the fuel to the through valve "D".
engine to be secured.
The piston labeled A Valve D, when When oil pressure to
provides a low pressure depressed, allows the valve C is diminished, a
signal to the other retained pneumatic pressure decrease is
components illustrated. pressure within the shut- developed at valve D,
down servo motor to be causing it to shift, and
relieved. nullifying the actuating
signal to device A.
valve size fuel pressure cylinder clearance
volume
The braking unit The reciprocating action The arrangement is used
prevents engine rotation of the device provides to position the cam
by the engagement of prestart lubrication to the shafts for the desired
brake splines into the cylinder walls. direction of engine
ends of the camshaft. rotation.
returns directly to the flows to the engine flows through a second-
sump bearings stage strainer, reheater,
and returns to the sump
pour point viscosity temperature quality of the oil

pour point of the oil flash point of the oil viscosity of the oil

wrist pin and the camshaft and the engine crankshaft and the
connecting rod block engine block
keep torsional vibration use existing supports maintain specified
constant and braces injection characteristics

governing system air starting system lube oil system

A 7 bar air supply The signals are None of the above is

pressure provides all generated via the correct.
three causative signals manually actuated valve,
to the shut down the reversing servomotor
servomotor, with the and the rotation direction
operating medium safeguard system.
provided by the main
bearing lube oil supply.
coolant for the brine means of heating the primary means of
cooler feedwater producing a vacuum

Marine Engineer Exam Questions

enable research and operate the valve gear allow for easier valve
development of cam where a larger force is replacement
contour to be simplified normally required, but
space limitations restrict
the use of a single large
spring
84.38 RPM 110.11 RPM 510.64 RPM

friction clutches disconnect clutches reversing gears

pick up more of any pick up less of any share an equal amount

increase in load increase in load of any increase in load

slide the camshafts to provide the engine with a change the directional
insure proper lubrication braking device rotation of the engine
Crankshaft journal Crankpin bearings Wrist pin bearings

a short length of heavy a length of approved welded flange

duty clear plastic tubing flexible nonmetallic hose connections for all joints
there are fewer moving adjustment is not better metering accuracy
parts required
provide cooling water provide the greatest prevent pump clogging
flow when the engine is pump efficiency from marine growth
running either ahead or
astern
piston crown connecting rod end heat sink space
assembly
faulty photocell detector low steam pressure high voltage on the
ignition electrode

60‚ 120‚ 180‚

engaged disengaged worn out

"A" to travel in a direction "A" to drive "B" in the "B" to drive "A" at any
opposite to "B" indicated direction of speed of "A" or "B"
rotation
BMEP IHP BHP
positive seating of the above normal operating damage to the journals
bearings in their temperatures
housings
Fiberglass Sheet asbestos Neoprene

Marine Engineer Exam Questions

coolers are not needed contaminants produced non-additive oils are
for the gear system by the engine could harm used in the main engine
the reduction gears system

seawater air lube oil

during the valve overlap with only the exhaust at a pressure below
period valve open atmospheric
fuel oil vapor at the unburned fuel vapors in lube oil vapors in the
sludge tank vent the scavenge air receiver crank case
Hydraulic oil Compressed air Lube oil and hydraulic oil

"7" "G" "17"

The water may be The separator is used to When the unit is secured
removed through the remove solids from the and the bowl stops
water drain valve or processed liquid, rotating, the water is
through the sludge ports therefore the drained off the bottom of
during the sludge accumulation of water the bowl through orifice
discharge cycle. does not present a ports.
problem.
pound under load be lubricated more easily tend to rotate with the
than with sufficient crush journal

high pressure lube oil low pressure lube oil line high pressure fuel line
line
fuel line water line lube oil line

Q W Y

Steel-lined Poured babbitt, self- Split roller

 aligning
reduce air charge induce air swirl deflect hot combustion
turbulence gas away from the valves
block all control system allow the boiler to cool close all manually
relays closed completely operated fuel valves
reduce gas flow prevent exhaust gas increase the rate of
turbulence corrosion combustion
bottom blow the boiler treat the water with treat the water with
caustic soda chemical scavengers

Expansion of the steam Expansion of the steam Expansion of the steam

in the furnace. in the whirling chamber. in the orifice plate.
clearance crush pitch

Marine Engineer Exam Questions

intake valves carburetor exhaust ports
eliminate the necessity prevent side thrust and prevent sludge and dirty
for an oil scraper ring cylinder scoring oil from entering the
crankcase
water oil diesel oil

shaft stopping system automatic stop solenoid pneumatic control circuit

hook and nail fork and blade male and female

Activation of the drain The transducer detects The water under

valve occurs when the the presence of water in centrifugal force
associated increase of oil the processed oil. It developed within the
pressure is sensed by then sends a signal to bowl acts upon the
the transducer, causing the controller which underside of the valve,
the signal from the initiates the opening of overcoming the
controller to decrease. the drain valve. opposing spring force,
causing it to open.
the prevention of an immediate furnace uncontrolled firing
automatic restart explosion
higher than those at low equal to those at low fire lower than those at low
fire fire

boiler water level is low feedwater is too hot boiler steam demand is
low
in the region of the load as a side relief where the at the bottom of the
bearing surface two shells meet bearing
combustion rod fuel injector interstage unloader

Cup-fed grease Sealed self-lubricators Metered hydraulic oil

supply
conducted through the conducted to water conducted through the
engine block cooled cylinder walls piston crown
supply meter reading return meter reading only sum of the supply and
only return meter readings

P Q W

An oil control valve in the The burner is cycled "on" The ignition electrode is
fuel return line controls and "off" in response to fired from a step up
the combustion rate. boiler pressure. transformer.

two independent means five air starting valves to one (explosion relief)
of starting the engine permit the admission of valve at the position of
starting air at any crank each main crank throw

Marine Engineer Exam Questions

chlorides sludge dissolved nitrogen
This damage would The engine would The engine would first
require an emergency continue to operate, stop, then automatically
stop to prevent the although the damaged reverse its direction of
engine from line should be repaired rotation.
overspeeding. immediately.
the damper is not fully oil pressure is not water pressure is not
closed sensed sensed

part #36 the needle valve the plunger

allow for slight prevent the escape of ensure proper

misalignment of the liner lubricating oil from the temperature flow
crankcase between the liner and
engine block
excessive lube oil contamination of the lube contamination of the
temperature oil by water cooling water by lube oil
higher than raw water identical to raw water lower than raw water
cooled installations cooled installations cooled installations, but
the pressure will be
higher
a specific volume of air the required quantity of the fluid required to
and an operating bladder grease to reduce produce the
maintenance intervals reciprocation of
component "F"
"M" and "13" "P" and "10" "T" and "10"

prevented by maintaining removed from emulsified All of the above are

proper storage fuel oil during the correct.
temperatures centrifuging processes
voltage fuel pressure steam pressure

desirable, as it will assist undesirable, since the undesirable, since the

in keeping the lube oil embedded particles will particles will interfere
filters clean score the journal with lube oil flow
exhaust stroke power stroke compression stroke

of the centrifugal type of the positive independently driven by

displacement type electric motors
exhaust valves scavenging air injectors

Marine Engineer Exam Questions

Valve "D" will shift to the By regulating the Valve "D" will shift, no
position shown, with the reduction of the 30 bar longer venting line "cc",
signal generated from air pressure at device 30 bar air pressure is
line "ff" determining the "B", the engine speed reduced by "B", and is
speed of the engine, as may be varied supplied to "A" for speed
the signal is modified by proportionally, operating control, and other
device "A". independently of any functions of lines "cc"
other control. and "ff".
ensure one way air flow boost the scavenge air provide turbulence in the
into the air header pressure scavenge air
eight consecutive starts ten consecutive starts twelve consecutive starts

Stop the sliding Position the engine in the No oil level is maintained
movement of the astern running position, in this arrangement; the
camshaft at midpoint, fill add oil to the ahead unit operates with
each cylinder to exactly cylinder until it is 3/4 full compressed air only.
halfway, replace the fill and carry out the
plugs and check for opposite procedure for
leaks during testing. the astern cylinder.
The sample tube The oil pipe is the The device delivers the
monitors the cylinder for mechanism in which the oil for piston cooling, in
evidence of piston "shaker" method of addition to liner
blowby. piston cooling is lubrication.
accomplished.
food for microbiological gases most detrimental all of the above
organisms to the ozone layer of the
atmosphere
drops below the changes from low to high remains constant and
electrode tip level unvarying

a cam operated follower a spring-loaded pressure timing gears keyed to the

plate crankshaft
centrifugal pump diaphragm pump gear pump
reduce corrosion in the prevent clogging and maintain zero water
heating coil erosion in the coil hardness
low voltage in the flame high boiler water level high steam pressure
scanner circuit

hydraulic lash adjuster multi-directional relief valve stem spring cap

valve
at low loads to prevent during periods of high when the turbocharger is
corrosion in the boiler steam demand in operation
Feedwater is treated with Oxygen is liberated in the Oxygen is liberated by
phosphates. three-stages of maintaining the highest
feedwater preheating. practical feedwater

Marine Engineer Exam Questions

stored on the vessel transported to the All of the above are
distribution sites correct.
Programming control Limit control system All of the above
system

Upper half of the main Lower half of the piston All bearing halves share
bearing. pin bearing in the an equal load.
connecting rod.

varying the fuel pump varying the injector a bypass valve

piston stroke needle valve clearance
special filter design pressure drop through relief valve
the filter
A separate means to Power circulating pump Superheater
prevent feedwater
contamination
Only the limit switch Jacking gear interaction The engagement of the
operation will be affected with the pneumatic jacking gear will prohibit
if the jacking gear control circuit is not used any useful operation of
handle is moved in this system. the system.
excessively.
approximately equal to that is widely fluctuating constantly decreasing as
exhaust manifold engine load increases
pressure at all times
annealed to prevent fitted with a welded rolled, beaded, and seal
cracking when rolled backing ring in the seat welded around the bead
area edge
The roller "G" is Roller "G" develops an The blocking roller,
incorporated into the output pressure at fitting utilizing spring force and
device to reduce the "H", directly proportional engine oil pressure,
frictional forces acting to the rate of maintains the reversing
upon component "F". reciprocation of control in its two end
component "D". positions.
If the operating oil level When changing the oil in If sludge buildup on the
of the engine is an operating engine, it bottom of the pan
consistently below may become necessary becomes excessive, it
normal, it will be to use a longer stick to will become necessary to
necessary to use a obtain the exact location shorten the dipstick to
longer dip stick. of the oil level at all accommodate for the
times. false oil level reading.
low temperatures to exist small amounts of water large amounts of water
to be present to be present
It is stationary and the It is turned by the base It is held in position by
shoes turn with the shaft. ring of the bearing. the bearing base ring.

ensure the needle valve prevent combustion gas prevent reflected

is flushed clean during blowback into the open pressure waves when
each injection needle valve the needle valve closes

Marine Engineer Exam Questions

relief valve metering valve variable speed pump
drive
low fuel pressure fuel return pressure low steam pressure

low voltage trip to trip reverse power trip to trip damage to windings

decrease in maximum increase in ignition lag decrease in fuel

cylinder pressure consumption per
 horsepower-hour
give warning that prevent wire drawing of prevent valve pounding
excessive boiler the disc and seat
pressure has been
reached
75 psig (514.86 kPa) 80 psig (549.18 kPa) 90 psig (617.83 kPa)

cool the furnace to remove explosive vapors evaporate accumulated

prevent preignition from the furnace unburned fuel oil

constant fuel combustion constant fuel return variable fuel supply

rate pressure temperature
lock wires buttons or pivots dowels and pins

changing filter elements filtering occurs twice in clogging will not occur
would not interrupt each pass of oil through
engine operation the system
A pressure regulating A pressure relief valve The engine speed
valve

reduce water reduce water turbulence provide an air cushion

temperature

The transformation of the Throttle signal Design charateristics of

signal takes place as the transformations occur the emergency control
check valve ball dithers during transient air supply will only
in its annular space to conditions as the permit regulated
continuously develop medium flows through blending of the two
downstream changes. device "A". signals.
7.66 psi 15.22 psi 45.70 psi

Marine Engineer Exam Questions

The pneumatic forces The horizontal The reversing unit is
required to operate the movement of the piston always used in
device are dependent is transmitted by levers conjunction with a
upon the speed of the to the camshafts, with controllable pitch
engine. the control piston propeller, permitting
movement being greater astern power
horizontally greater than than the sole use of a
the camshaft movement. controllable pitch
 propeller.
line of maximum propeller curve line of maximum
horsepower efficiency
Most heavy fuels contain Microbiological infection The necessary nutrients
chemicals which prevent does not affect marine that the organisms feed
the growth of fungi and fuel but rather the on are in a more
other bacteria. personnel who are complex form and not
involved with the available for microbial
handling, storage and degradation.
purification of the fuel.
excessive cycling high fuel oil pressure improper burner
maintenance
right to left only in either direction the bearing pictured is
not designed to carry
thrust
copper iron monel metal or stainless
steel
the speed of the lube oil the outlet pressure of the a relief valve
pump lube oil pump
Reduces the likelihood of Provides a low pressure All of the above.
air or steam pockets point for the addition of
formation. makeup cooling water.
close the air cock once blowdown the gage glass crack the steam stop to
fires are lit assure protective steam
flow
returned to the lower passes through the automatically dumped
drum via downcomers domestic heating system into auxiliary feed heater
due to density difference return line steam traps and reheated by
for reheating to the auxiliary feed auxiliary exhaust back
supply tank pressure
high fuel oil temperature low fuel oil viscosity high steam pressure

purge the unit of non- relieve excess pressure add de-scaling chemicals
condensable gases as needed
all generated steam is heated water flashes to response to steam
recirculated through steam in the boiler demand is slower than in
heating coils in the boiler heating coils a fire-tube boiler
welding plates to form forging integral case hardening integral
sections for assembly components components

Marine Engineer Exam Questions

engine thrust bearing crosshead bearing main shaft flexible
coupling
maintain fuel pressure at adjust the fuel rack relieve excess fuel
a preset level spring tension pressure to the suction
side of the pump
The oil pressure is less The oil pressure is The oil flow control valve
than the cooling water greater than the cooling is always installed in the
pressure. water pressure. oil input line
sea water expansion thermostatic expansion jacket water cooler
tank valve accumulator
the proportional offset of main engine speed emergency clutching
the throttle signal operations

last part of the intake early part of the injection early part of the power
stroke only stroke only stroke

Incorrect fuel pump Minimal marine growth Damaged propeller

settings on hull blades and hub

a dazzling white atomizer fluctuating pressure in an unevenly shaped

flame the windbox burner flame
hazy light brown hazy light blue hazy light grey
The high limit control The stack relay actuates The stack relay secures
secures power to the the low limit control power to the high voltage
entire oil firing system. which breaks the ignition side of the ignition
circuit. transformer.
Column Entablature Tie rod

required, if there are no not required, provided strictly prohibited

separators installed on there is a high and low
board tank suction
the lube oil cooler to be positive lube oil pump galvanic action in the
bypassed suction to be assured cooler to be minimized
expansion tank inlet heat exchanger inlet cooling water pump
outlet
The indicated valve If the locking handle is in If the throttle is manually
prevents transmission of any position other than moved from its "zero"
transient signals to the "zero", the output of the position, the resulting
governor speeder spring. pneumatic valve will effect will tend to
equal the input. override the output of the
governor, and secure the
air to the control circuit.
3 and 4 4 and 5 5 and 6
 Marine Engineer Exam Questions
The engine may be Operation within area "B" Ideally the engine should
operated in any area of is permitted for extended be operated in area "A",
the diagram provided time periods provided no however, it is permissible
steps are taken to changes are made to the to intermittently operate
reposition the load air intake system. the engine in area "B".
indicator.

equal to that available for at 70 percent of the while underway and

ahead operation ahead rpm at rated under all normal
speed conditions
smoky boiler operation decreased fuel improved fuel
consumption combustion
incorrect electrode defective solenoid valve grounded high tension
setting lead
crosshead guide rails tie rods entablature

the lack of high pressure their relatively low reduced wear of spray
fuel lines injection pressures orifices

Clean all electrical Lift the relief valves by Inspect and clean all
connections. hand. solenoid valves.
water in the fuel oil broken high tension incorrect electrode
leads setting
decrease the fuel adjust damper linkage to adjust damper linkage to
pressure slow the opening rate of lengthen the purge
the dampers period
piston nears and passes latter part of the piston passes BDC
TDC downstroke
Hydrazine treatment of Frequent compounding Chemical cleaning
condensate
overpressure and dry a severe furnace spalling damage to the
firing explosion brickwork
fuel pump failure fan motor failure increased feedwater
consumption
line shaft bearings connecting rod bearings main bearings
Tie rod Piston rod Piston rod nut

Common rail Unit injector Air injection

allow filtration of less decrease the pressure improve overall filtration

viscous oil drop across the filter
jacket water outlet cooling water pump heat exchanger outlet
outlet
Marine Engineer Exam Questions
The operator of the The air supply may be The throttle is set too
engine has failed to interrupted due to the high for starting
reopen the main air start incorrect position of the purposes, causing the
valve. fuel control lever. spring positioned overide
interlock to admit control
air to the engine cutout
device.
piston crown surfaces formation of excessive compression pressure
becoming too cold quantities of condensate being greatly reduced
Inclement weather Damaged propeller None of the above
blades
cotter pins made of split pins or other hydraulic nuts as
spring steel effective means commonly found on large
low speed engines
fungi yeasts All of the above
every time the boiler is lit with a stop watch to by slowly lowering the
off after an extended lay verify shutdown times boiler water level
up period

electric charge to buildup fuel pump to restart drum level to stabilize

in the igniter

positioning the control accurate metering of the eliminating injection lag

sleeve fuel oil
connecting rod bearings piston pin bushings All of the above

cylinder jacket inlet main heat exchanger inlet jacket water pump
connection suction line
The governor should be The engine speed can The linkage to the shut
replaced with one that be controlled using the down servomotor and
has been proven to be fuel control lever without the governor output shaft
useful in isochronous changing the position of must be disconnected in
applications. the maximum fuel stop. order to operate the
engine via the fuel
control lever.
push rods combustion gases valve springs
"H" "8" None of the above are
correct.
back to the fuel oil settler back to the suction side directly to the deep tanks
for further filtration of the service pump

humidity and improper tank washing All of the above

condensation procedures
Marine Engineer Exam Questions
Low boiler water level High boiler water level A faulty coil in one of the
solenoid valves

accept most of the mount the engine frame connect the crosshead
tensile loading that securely to the hull to solidly to the piston rod
results from the firing prevent shaft coupling
forces developed during misalignment
operation
Reverse scroll Air injection Pintle type

splash feed gravity feed pressure feed

the lowest point in the or near the floor plate or near the tank top level
system level
changing fuel oil return changing the speed of a varying air pressure
pressure rotary cup supplied to the nozzle

particles becoming entering the water jacket particles entering lube oil
lodged under the intake
valves
The registers will open The fuel oil valve and air The steam flow will be
fully. damper will open wider. automatically regulated.

The purge cycle should An alarm should ring. The fuel oil pump should
begin. stop.

passes through the leaves the burner as a leaves the burner as a

tangential slots before straight stream until straight stream until
passing through the mixed with the primary mixed with the swirling
whirling chamber flow of combustion air atomizing steam
B C D

telescopic oil lines tie rods fuel oil lines

produce the proper fuel atomize the fuel all of the above
oil pressure
main bearings piston crowns cylinder walls

Kingsbury thrust bearing Axial/radial bearing Michell bearing

"T" is the camshaft and "G" is the main camshaft "B" is the camshaft and
its speed equals drive and rotates at its rpm will match that of
crankshaft speed. crankshaft speed. the flywheel.
open late and close late fail to open when the fail to open at normal
 engine is cold operating temperature

Marine Engineer Exam Questions

free entry of air to the water entering the excessive oil leakage
crankcase crankcase while engine during periods of
washdowns are being increased blowby
performed
increase in direct decrease if bleaches are remain unchanged
proportion to an increase added to the fuel on a provided complete
in temperature regular basis consumption of the fuel
occurs monthly
soap hardness nitrogen content chloride content

accidental dry firing and uncontrolled fires in the explosions in the boiler
overpressure furnace furnace
prevents spark removes combustible determines the level of
generation gases combustible gases
Common-rail injection Air injection Jerk pump injection

bearing pressure in a bearing pressure in a two the maximum bearing

four-stroke/cycle single stroke/cycle single acting pressure is higher in a
acting diesel engine is diesel engine is single acting two-
continually reversed continually reversed stroke/cycle diesel
engine
aluminum plates lead cathodes copper baffle plates

starting gear and slinger ring and lip seal jacking ring and indicator
shrouding
closing later opening sooner staying open for a
shorter period of time
open the intake and operate the exhaust and convert rotational energy
exhaust valves starting valves to reciprocating
pressures
hinged rain guards corrosion resistant flame dipsticks for measuring
screens oil levels
increase exhaust gas reduce accumulations of eliminate exhaust gas
velocity through the carbon deposits on the pulsations and noise
boiler heat transfer surfaces
adding hydrazine blowing down the boiler adding phenolphthalein

Increases the sludge Prevents the Improves lube oil

forming tendency of lube accumulation of cooling.
oil. combustible gases.
crosshatched design lapped plunger and variable stroke
barrel
internal crankshaft immersion in oil splash lubrication
passages
reduce electrolytic action keep heat transfer prevent rapid
on heat exchanger surfaces shiny and clean accumulation of marine
metals growth

Marine Engineer Exam Questions

steam demand is too water level is abnormally feedwater flow is low
high low
It condenses the vapors It removes sensible heat It serves to boil off
formed in section "G". from the jacket water. incoming feedwater.
The boiler vent valves All handhole/manhole All of the above.
should be opened. covers should be
tightened up as much as
possible to preclude any
leaks.
automatically cycling the responding to the boiler regulating the fuel oil
burner on and off high and low water level service pump discharge
limit switches pressure
Decreased feedwater Pump recirculating line Excessive feedwater
temperature being open too much temperature
after the fuel oil valve after a prepurge of not before the trial for
opens less than 10 seconds ignition period

increase the air charge reduce the risk of all of the above
velocity explosion
adjusted during each higher at sea than while lower at sea than while
hour of operation while at maneuvering maneuvering
constant RPM
an oil jet internal splashing drilled passages in the
crankshaft
oil pressure in the oil quantity of oil delivered proportioning device in
return line by the service pump the atomizer fuel valve

low water level wide flame cone angle high fuel oil pressure

prevent exhaust gas increase the velocity of increase the rate of heat
erosion of the tubes exhaust gas flow transfer
burner throughput returned to the settler discharged from the
pump

burner root valve oil micrometer valve fuel oil back pressure

through stays hydrokineter belly plug

piston type vacuum gland exhausting crankcase exhaust fan

pump taking suction off a manometer
differential manometer
individual jerk pump and fuel valve supplied from fuel valve, spray valve,
injector the common rail and flame plate
Gravity Pressure Bypass

Marine Engineer Exam Questions

"6" and "3" "6" and "13" "13" and "14"

"D" "B" "C" and "Y"

Piston blow-by A defective aftercooler Faulty exhaust valves

In most cases it is No interconnection may None of the above are

desirable and cost be made between the correct.
effective for propulsion crankcase ventilation
engines to share a pipes or oil drain pipes.
common crankcase
ventilation and
monitoring system.
The fuel in the tank will Corrosion of various All of the above are
loose its fluidity, solidify, metal components will correct.
and be the cause of an occur due to the
expensive removal formation of hydrogen
process. sulfide gas.
abnormally high abnormally high boiler steam demand
feedwater temperature water temperature exceeding feed pump
capacity
Low fuel oil pressure Low atomizing steam Water in the fuel oil
pressure
Inspect and clean all Lift the safety valves by Inspect for oil or water
solenoid valves. hand. leaks.
Unit Distributor Pump controlled (jerk
pump)
an independent lube oil the stern bearing head the stern bearing sump
system tank tank
fuel supply is shut off water supply is shut off safety valve lifts

combustion pulses fuel oil pump failure flame failure

decrease average decrease air charge increase power output

compression pressure density
Lube oil standby pump Hydraulic switch Motor drain

high temperature excess incorrectly setting the an incorrectly positioned

air hotwell dump valve burner snubber relay
in the event of a stack when the water level when the feed pump
fire reaches the crown sheet discharge pressure
drops to a preset
minimum
salt contamination water hardness chlorine contamination

2800 cubic inches 4766 cubic inches 5712 cubic inches

Marine Engineer Exam Questions

1 5 11

provide linear motion to prevent angular and reduce resonant

the vessel by the offset misalignment due frequencies allowing the
conversion of the rotating to the inertial forces of use of smaller harmonic
forces of the engine the propeller and its balancers
associated shafting
fuel manifold injector adjusting link overspeed trip shaft

Crankcase vapor Engine exhaust silencers Constant pressure type

monitors turbochargers
stripping of paint in tanks reduced corrosion in fuel usually discovered
tanks during normally
scheduled strainer
cleaning
duplex type strainers single strainers of the single strainers fitted with
self-cleaning type bypasses

flame failure burner smoking ignition failure

seawater contamination frequent surface blows dissolved oxygen
deaeration
one-half crankshaft crankshaft speed in a two times crankshaft
speed in a two-stroke two-stroke cycle diesel speed in a two-stroke
cycle diesel engine engine cycle diesel engine

their free-floating design their relatively small size the reciprocating motion
of the piston
around the engine around the cooler to the expansion tank

The illustrated set up The minimum size of the The shut off valves on
may be used on any piping connecting the the boiler drum must be
steam boiler, for any water column to the of cast iron.
steam pressure, up to steam drum is to be 1.5
300 psig (2170 kPa). inches (3.8 cm).
prevent the boiler from eliminate the need for cause automatic restart
automatically relighting furnace purging after a purge period
maintain a head of steam completely fill the boiler flush the boiler and close
not less than 10 psig with feedwater the waterside airtight

broken or grounded high a faulty ignition cable an incorrect electrode

tension leads connector setting

remove suspended and completely drain the prevent hardened scale

precipitated solids from boiler in an emergency deposits in the water
the boiler water situation drum

Marine Engineer Exam Questions

burner tip marked 20 burner tip marked 32 orifice plate marked 20

135 RPM 270 RPM variable depending on

the camshaft gear train
gear ratios

lock the fuel inlet position the control rack prevent the barrel piece
connection into the pump while calibrating the #26 from rotating in the
housing pump housing
operated manually once operated until the engine placed into operation
each hour has started only at maximum load
suction pressure thermostatic bypass sea water temperature
regulator valve
A separate system Only silicate ester based The lubrication system
containing oil under synthetic oils have the closely resembles the
extremely high pressure capability and necessary system used with
is used due to its ability characteristics to be standard shaft bearings.
to provide a high film used in this type of
strength. application.
Leaking cylinder head Leaking aftercooler Excessively high
gaskets scavenge air
temperature
camshaft adjusting screw permadjust assembly injector control shaft

return seating type spring centered type spring opened type

Evidence of corrosion Pitting of metal surfaces Presence of green slime

direct action of cam shaft compressed air pressure hydraulic "push rods"

475 RPM 950 RPM 1900 RPM

It limits the actual stroke It takes the plunger off It prevents the plunger
of the plunger. stroke when injection is from rotating in the
completed. barrel.
the power stroke the compression stroke low load operation only

cooling water pump nozzle cooling passages cylinder jackets

back pressure regulation oil supply pressure not return flow atomizer
resulting in more having to be reduced at being designed for best
complete combustion at low loads to the point combustion at low firing
high firing rates where poor atomization rates
occurs
failing to reach rated knocking under hunting or surging under
speed maximum load light load

Marine Engineer Exam Questions

The bearing blocks are The thrust shoes of a Found within the thrust
massive and their weight Kingsbury thrust bearing bearing cap or cover are
provides sufficient force are held in place by pins. extended protrusions to
to prevent rotation. position the segments
and maintain minimum
clearance.
"B" "E" "F"

0.1 bar 0.2 bar 1.0 bar

Objectionable odors Increased air filter Occurrences of flow

changes restrictions
twice the crankshaft half the crankshaft speed the same speed as the
speed crankshaft
To allow the pump to be To check for sludge on To check that fuel oil
timed to the engine. the pump barrel. return passages are
clear.
oil spray oil bath oil control rings

regulating the level of the level of the varying the engine load
corrosion inhibitor in the freshwater expansion to meet temperature
primary cooling system tank requirements
atomizing steam size of the whirling back pressure in the fuel
pressure chamber oil return line
engine is hard to start engine misses surges at governed RPM

modulating pressuretrol feed pump controller and feed pump controller and
pyrostat burner circuit
hour day week

be designed to incorporate an open be capable of closing the

automatically relight the bimetallic helix pyrostat fuel valves in not more
boiler fires after a low stack switch than 4 seconds after a
water shutdown flame failure
large conical springs compressed air pressure hydraulic pressure

twice the crankshaft half the crankshaft speed the same speed as the
speed crankshaft
fuel nozzle cylinder head high pressure fuel line

splash method spray method shaker method

Marine Engineer Exam Questions

Emergency hand control Excessive cooling would Excessive cavitation
would not be possible if take place in the heat erosion would take place
water flow through the exchangers at high in the coolers.
jackets were controlled. loads.
dip stick thermometer shaft deflection indicator

low firing pressure and high firing pressure and high firing pressure and
normal exhaust low exhaust high exhaust
temperatures temperatures temperatures
"D" "E" "G"

open quickly against close quickly in order to close slowly to permit

crankcase pressure to prevent an inrush of air proper seating of the
prevent a possible valve disc and neoprene
implosion sealing surfaces
Banalities Biocides Benzene additives

Through the sprayer Through tangential slots Through baffles in the

plate drilled passages. in the sprayer plate. orifice plate.

775 RPM 1550 RPM 1800 RPM

change the total distance align the pump to the align the plunger within
traveled by the plunger control rack the barrel
lube oil filtration lube oil purification piston cooling

Low pH Proper alkalinity All of the above

fuel oil in the feedwater improper treatment of the excessive feedwater

feedwater with calcium alkalinity
sulfate
loss of cooling water to gradual fouling of the air improperly timed exhaust
the diffuser filters valves

ungrounded neutral leg water in the boiler drum magnetic field

of the control circuit and electrode assembly surrounding the water
level electrode assembly

7 4 1

Audible alarms shall not Visible indicators are not Failure of the flame
be silenced manually. required for low water safety system need not
shutdown. be monitored.
The minimum size of the The shutoff valve on the A minimum of three test
piping connecting the boiler drum must be of cocks may serve as the
water column to the cast iron. primary water level
steam drum is to be one indicator on boilers under
inch. 250 psig.
Marine Engineer Exam Questions
cylinder lubricator cylinder test valve precombustion chamber

allow oil backflow from reduce fuel oil pressure meter the quantity of fuel
the injector to the helix between injection strokes delivered
shaker circulation spray

5° to 10°F 10° to 20°F 25° to 50°F

The clearance is No clearance is needed; To measure this

required to permit axial "F1" only indicates the clearance the engine
expansion of the engine area in which the most should be cold, the
crankshaft while rapid wear will occur. vessel trimmed down by
permitting proper the stern, and the shaft
operation of the thrust hydraulically pushed
bearing. towards the bow.
"I" "M" "Z"

They may be omitted The type of engine and Minimizing the danger
provided the engine operating cycle must be from emission of flame is
utilizes a crankcase considered by the a key consideration
monitoring system designer
fuel oil centrifuges fuel oil discharge filters chemical additives called
biocides

acidic corrosion of the hard scale deposits on etching of the heat

boiler metal the boiler tubes exchange surfaces
low steam pressure high voltage all of the above

dry back boiler type water-tube type critical circulation boiler

type
securing the boiler and increasing the pH reducing the phosphate
giving it a bottom blow level
high furnace air pressure high steam pressure low steam pressure

Control air supply Cooling water flow Lube oil temperature

pressure through aftercoolers

relight the fire off the purge the furnace of any speed up the feed pump
brickwork as long as the combustible gases to prevent dry firing when
bricks are cherry red before attempting to the burner flame is
relight the fire reestablished

Marine Engineer Exam Questions

collapsed hydraulic valve loose valve spring locks worn valve seats
lifters

increased fuel increased feedwater fuel pump failure

consumption consumption
phosphate treatment zero water hardness dissolved oxygen
deaeration
a low pump suction lift abnormally low water grounded probes in the
temperature water level control
To check the valve To examine the valve To check for a tight
packing. stem for scars or nicks. bonnet seal.

prevent carbon deposits help the injector needle provide a prolonged

from forming on the reseat without dribbling pressure drop in the high
injector nozzle at the nozzle holes pressure steel piping to
the injector

of a material harder than properly lubricated prevented from

the cylinder liner compressing
reduce the probability of reduce the opportunity allow for smaller water
scale formation in the for the formation of passages within the
jacket cooling passages sulfuric acid in the engine
cylinder bore exhaust
passages
The total active thrust The loading ratio, or These dimensions
area is 202.3 mm, well shaft diameter divided by indicate the presence of
within the standards set collar surface area is flourishing marks on the
forth by the GSMA within 2.7 : 1. thrust shoes; the marks
(German Society for becoming visible as the
Machining Accuracy). distance at "f1"
increases.
incorrect electrode incorrect nozzle position clogged fuel nozzle
setting
2 4 6

inefficient combustion dark smoke automatic shutdown

Clean all duplex oil Observe general boiler Lift the safety valves by
strainers performance hand
High water level Low steam pressure Flame failure

deliver proper fuel provide rapid fuel control fuel quantity

quantity to the injection injection cutoff entering the pump body
nozzle
fed from mechanical thrown off from the main supplied from wick fed
lubricators bearings drip lubricators

Marine Engineer Exam Questions

a decrease in lube oil a decrease in cooling a thermostat failure
viscosity water pH

ignition current is too low fuel oil pressure is too fuel nozzle is correctly
low positioned
uniflow scavenging loop scavenging direct scavenging

Inspect and clean burner Lift the safety valves by Blowdown the water
fuel oil solenoid valves hand gage glass
faulty steam pressure broken 2000 volt supply clogged fuel nozzle
signal to the trial for lead
ignition circuit
automatic burner uncontrolled firing automatic restart
shutdown
an examination of the checking for external fuel measuring steam quality
boiler firesides and water leaks
the crankshaft speed one-half of the proportionate to the
crankshaft speed crankshaft speed
On the suction side of In the injection pump On the inlet side of the
the delivery pump housing discharge spray valves
A wear rate of 1.6 mm The stops in which the A wear rate of 1.6 mm
per year occurred. thrust bearing block rides per year is excessive and
Although not excessive, are worn, and it is requires immediate
this condition may necessary to return these assistance from the
require more frequent to their original manufacturer's field
monitoring. specifications. support.
140° to 159°F 160° to 179°F 180° to 199°F

Air Assisted Unit Rail

inertia scavenging loop scavenging central scavenging

It removes the distillate It is the chemical It is used to empty the
condensed in area "24". cleaning pump used in evaporator section when
conjunction with valve there is tube leakage
"12". while the unit is secured.
not secure the fires until secure both the fires and secure the fires when the
water level falls out of the feed inlet valve pressure drops to 50% of
sight in the gage glass the maximum allowable
working pressure
ignition failure panting of the furnace sputtering of the burner
flame

Marine Engineer Exam Questions

bypass exhaust gas at bypass a portion of the recycle exhaust gas to
high loads to prevent exhaust gas at peak the turbocharger
excessive back pressure loads for better efficiency

67.91 RPM 652.63 RPM 505.79 RPM

maintain constant maintain a column of fuel accurately meter the

pressure in the discharge in the line quantity of fuel injected
line
steam demand is high salinity is high safety valve simmers

need for water treatment cooling water cooling water pumps are
is eliminated temperature differential directly reversible
is greater
prevent engine back increase total engine prevent boiler corrosion
pressure at heavy loads efficiency at low loads at low engine loads
control air circuits supercharging turbochargers

sulfite or hydrazine sulfite or hygroscopic bromide or hydrazine

sulfite
15 seconds 30 seconds 60 seconds

corrosion at low engine erosion at high engine overload at high engine

loads loads loads
seawater contamination frequent surface blows dissolved oxygen
deaeration
camshaft rotates at the governor is linked to the explosion relief doors are
same speed as the fuel injection pump by clearly visible on both
crankshaft vertical linkage sides of the crankcase
hydraulic action fuel pressure spring #14
The damper on the inlet The damper on the inlet The damper is moved to
side of the furnace is side of the furnace is the closed position for a
moved to the open moved to the open given number of
position for a given position for a given seconds and then moved
number of seconds and number of seconds and to the low fire position.
then moved to the closed then moved to the low
position. fire position.
insufficient air for complete combustion in secondary combustion in
combustion the furnace the uptake
excessive purging before insufficient trail for a faulty transformer in
lighting off ignition period the ignition circuit
direction of air flow within sequence of port method of opening
the cylinder opening exhaust ports

Marine Engineer Exam Questions

The clearance on one The clearance is The normal play on both
side of the shaft at the determined by the sides of the shaft will be
axis will be one twentieth thickness of the one tenth of a millimeter.
of a millimeter. hydrodynamic wedge
formed and is not usually
measured while
underway.
"J" "K" "N"

have three explosion have at least eight not be required to have

relief valves explosion relief valves explosion relief valves

reduce engine back recover heat which increase turbocharger

pressure otherwise would be lost efficiency
twice that of the the same as the dependent on the
crankshaft crankshaft speed diameter of the lower
timing gear
ensure the beginning of thoroughly utilize the air allow controlled fuel
fuel injection charge combustion
there is no excess of sludge formation cannot waterside blowdown will
oxygen scavenging occur in the steam not be required
chemicals separator
6 psig 15 psig 28.7 psig
pressure-control feedwater control valve superheat control system
regulator
little or no valve excessive valve collapsed or stacked
clearance clearance valve springs
exhaust load system constant or pulse constant volume system
pressure system

steam pressure sensing metering device in the air signal from the feedwater
device with linkage to the supply line electrode
damper air vanes
exposed valve springs a clogged drain line a damaged seat

dirty fuel nozzle grounded high tension faulty ignition cable

lead connector
Bimetallic element Ring thermostat Modulating pressuretrol

aid in completing cylinder inject fuel at the proper minimize fuel penetration
scavenging time into the cylinder

Marine Engineer Exam Questions

reduce engine exhaust reduce engine back increase engine cycle
noise pressure efficiency
raise lube oil viscosity for increase air inlet increase compression
easier starting in cold temperature ratio
weather
1.00 mm 0.30 mm 0.46 mm

Natural aspiration Turbocharged Roots blower

"K" "J" "N"

three compression rings one intake and one one explosion relief valve
per piston and the exhaust valve per in way of each alternate
minimum of two oil cylinder provided no crank throw, with a
scraper rings other means of minimum of two valves
scavenging is used
constant fuel supply constant fuel return variable fuel supply
pressure pressure pressure
dirty atomizers faulty limit controls high water level
375 RPM 500 RPM 750 RPM
jacket water pump lube oil pump fuel oil pump

controls the flow of monitors the boiler high secures the fires when a
feedwater to the boiler water level fusible plug burns out

adjusting the radiator passing cooling water passing cooling water

louvers through a space heater through the lube oil
cooler
low steam pressure high voltage on the open air damper
ignition electrode

provide steam for provide steam for the heat the waste water
emergency propulsion turbogenerator tanks
Water circulation in the The gasket and its The gasket material will
boiler will be disrupted. seating surface may become hardened.
become wire drawn.
excess air pressure steam moisture content furnace temperature

fuel oil recirculating valve fuel oil back pressure fuel supply pressure
regulating valve

Insufficient steam supply Excessive opening of the Improper turbine shaft

to the fuel oil heater. dampers in the speed in the atomizer
combustion air inlet. assembly.
push rods chain drives rocker arms

Marine Engineer Exam Questions

control rack delivery valve cylinder arrangement

gas temperature pressure timing

Retards the flow of Protects metallic Tends to increase

cooling water surfaces from corrosion corrosion
and the coolant from
freezing
Fusible plugs Gage glasses Water columns

fuel return pressure steam pressure furnace air pressure

fireside erosion high steam demand overheated tubes

II only both I and II neither I or II
decrease the fuel oil decrease the fuel oil increase the air supply
temperature supply pressure
prevent sludge from remove floating remove settled solids
forming in the steam impurities from the boiler from the water drum
drum water surface
rotate or displace the bring the respective cam all of the above
camshaft according to under the air distributor
engine design pilot valves
It opens the nozzle valve It opens the nozzle valve It closes the nozzle valve
when the release port is when the supply port is when the supply port is
uncovered. covered. covered.
when the boiler has been only after raising the only after bypassing the
cooled to ambient water level to within 1/2 low pressure pressuretrol
temperature inch of the high water
cutout
viscosity has decreased demulsibility has foaming is guaranteed to
improved occur
"N" "W" "14"

possibility of explosion unit is operating in overall volume of the

exists due to the extreme overload space exceeds 0.6 cubic
formation of volatile conditions meters
gases
II only both I and II neither I nor II

Supercharged, loop Turbocharged, crossflow Turbocharged, return

scavenged diesel engine scavenged diesel engine flow diesel engine

Marine Engineer Exam Questions

weaking of the tubes at burning of tube ends fireside corrosion
the tube sheet
automatically cycled on automatically supplied equipped with standard
and off in response to with more fuel on variable capacity
demand demand atomizers
fuel injectors exhaust valves intake valves

prevent bolt failure by maintain the same hold- permit accurate stretch
allowing limited down force on the gauge measurement of
movement of the injector injector regardless of bolt elongation during
when excessively high varying engine operating installation
cylinder pressures are temperatures
developed
7.4 million BTU's per 14.8 million BTU's per 22.2 million BTU's per
hour hour hour

is dangerously promotes scale buildup may cause frothing

flammable
600 psi 450 psi 250 psi

modulating pressuretrol, pyrostat measuring pressuretrol measuring

sensing both steam decreased steam only the steam pressure
pressure and temperature
temperature
Feedwater is preheated An external superheater An unfired exhaust gas
in a separately fired unit is located above the preheater is added to
economizer. boiler in the gas increase the heat
passages. transfer rate.
100 psig 200 psig 250 psig

the damper is not the damper is not fully oil pressure is not
sufficiently opened closed sensed

attain maximum lift when open with a sharp, clear close sharply when the
it pops below its set pop at its set pressure pressure drops to its set
pressure pressure
B F G

type of piston rings pressure of the fuel size of the pump plunger
system spring

Marine Engineer Exam Questions

Valve "1C" shifts, Valve "1D" shifts, Device "27B" will not shift
directing control air to directing control air to until the three position
device "27A", reversing device "27B" and the cylinder transfers the
the control valve and three position cylinder, pneumatic signal to the
increasing the pressure with the action of the reversing control valve to
as the final position of cylinder determining the establish the set point
the vane motor is position of the reversing reference.
established. control valve.
provides better vapor- has a higher freezing has a lower freezing
phase cooling point and a lower boiling point and higher boiling
point point
"N" "W" "13"

possibility of explosion unit is operating in gross volume of such

exists due to the extreme overload space exceeds 0.6 cubic
formation of volatile conditions meter
gases
help prevent the eliminate oxygen being all of the above
formation of carried into the system
condensation on the tube
exteriors

detects a flame failure by requires mechanical must be bypassed at low

monitoring radiant heat linkage to secure the firing rates
from glowing refractory burner fuel supply
195 psig 210 psig 220 psig

3 air changes 4 air changes 5 air changes

acceleration rate of valve engine fuel efficiency diameter of intake and

opening and closing exhaust valves
timing of the pump supply pressure to the shape of the combustion
pump chamber
burner electrode is fuel/air ratio is incorrect ignition current is too low
incorrectly positioned
The boiling temperature With antifreeze A 30% solution of
of the solution remains protection of -60°F (- ethylene glycol will
constant at the level of 51°C), the boiling protect the cooling
greatest protection temperature could be system at temperatures
against freezing to -70°F 230°F to 250°F (110°C to of -18°F (-26°C).
(-57°C). 121°C).

Marine Engineer Exam Questions

energized the flame shut off the burner when prevent burner operation
scanner circuit when the cutoff pressure is in the event of low boiler
high boiler pressure is reached water level
reached
provide a wide range of provide a constant fuel maintain smokeless fuel
combustion return pressure oil atomization
fuel oil return pressure burner register opening atomizer orifice setting

insufficient air to the loose hold-down bolts all of the above

burner
give the boiler a bottom test the safety valve completely open the
blow steam stop
hot water flashes to unevaporated feedwater response to steam
steam in the flash is lost through the demand is slower than in
chamber atmospheric vent a fire-tube boiler
velocity of opening and amount of the valve lift all of the above
closing of the valve from its seat
Multi-hole Open Self-cleaning

Three-way valve Pressure relief bypass Mechanical straining

line around the filter filter

reduce the cooling water increase cooling water form a protective film on
temperature hardness metal surfaces
Each counter action of When the reversing When the reversing
the aforementioned control valve is in its final servomotor flaps (vanes)
devices modifies the position, a hydraulic have been properly
signal to the reversing signal shifts valve "27G" rotated by hydraulic flow
servomotor and releases and device "8.07" to the via the reversing control
various interlocks and proper open positions, valve, "27C" and "27F"
pneumatic safeguards. releasing the shutdown will be hydraulically
servomotor. shifted.

"N", "M", "C", "5", and "N", "M", "9", "3", and "W", "3", "9", "M", and
"W" "W" "N"

Explosion relief valves Quick release expansion Stacked plate type inlet
joints check valves

test the high and low fire check the photocell check the burner ignition
solenoids window for carbon electrode gap
deposits
Low water level cutoff Voltage output of the Insulation resistance
switch ignition transformer readings in the ignition
 Marine Engineer Exam Questions
Insufficient combustion Low water level Flame failure
air
opening and closing opening and closing rate height of valve opening
points of the valve of the valve
Hole Multi-hole Pintle

full flow system bypass system shunt system

I only II only both I and II

Water is continuously Steam is generated in Unevaporated boiler

circulated through a the heating coils and is water collects in the
preheater before it enters force fed to an bottom of the
the flash chamber. accumulator. accumulator.
the oil valve not seating a loose burner nozzle carbon on the burner
properly nozzle causing deflection
of oil spray
audible high water level temperature limiting pressure relief valve set
alarm device at 212° F
prepurge period for one ignition period to ignite not to automatically
complete change of air the fuel 4 seconds after increase the air flow after
fuel delivery a safety trip
heating coils steam accumulator (flash hotwell
chamber)
carbon deposits on the excessive fuel oil excessive return oil
electrode temperature pressure
Speed, torque, and Firing order, valve timing, Fuel consumption,
horsepower production and valve lift efficiency, and cylinder
pressure
cold corrosion of the fuel viscosity for better carbon accumulation on
nozzles atomization the nozzles
prevent prevent bypass the filter should it
overpressurization of the overpressurization of the become clogged
filter cartridge filter casing
slight acidity slight alkalinity excessive alkalinity

Valves "1D" and "1C" are Valves "27B", "30B", Valves "27A", "27B",
closed, with valves "27C", "27F", "27G" and "30B", "27C", "27F",
"27B", "30B", "27C", device "8.07" have all "27G" and device "8.07"
"27F" and "27G" having shifted and opened. have all shifted and
all shifted to their open opened.
positions.
"11" "17" "N"
 Marine Engineer Exam Questions
The air flow from the A suitable gasket for the The scavenging space is
scavenging space must interface of both to be permanently
always be protected by manifolds is necessary to connected to an
plate type check valves prevent recirculation of approved fire
and under no scavenging gases, while extinguishing system,
circumstance may other additionally minimizing entirely separate from
devices be used. exhaust gas leakage. the fire extinguishing
system of the engine
room.
dead or malfunctioning faulty ignition cable loose connection on the
step up transformer connector photocell

stack switch pyrostat photoelectric cell

Incandescent glow plug Friction igniter Light oil pilot

ramp flank nose

Combustion gases flow Flames impinge on the Combustion occurs in

through the tubes. tubes. the tubes.
Steam is generated in Steam is recirculated to Response to steam
the flash chamber. the heating coils. demand is comparatively
rapid.
slightly acidic condition slightly alkaline condition overtreatment of water

heat conduction into the heat conduction into the water circulation through
injected fuel oil water jacket wall passages in the holder

The isochronous This device serves to Hydraulic pressure is

operation of the shut linearly shift the camshaft developed by the
down servomotor and into its proper operating actuation of this device
the pneumatic fuel pump position and to and is used to power
cut-out device are "safeguard" this position other components in the
dependent on the during all engine system, returning all oil
operation of this operation phases. directly to the engine
safeguard. sump.
crankshaft counterweight frequency tuner main bearing support
assembly
Exhaust manifolds in Crankcases having a Turbocharger inlet piping
excess of eight inches in gross volume in excess in excess of twelve
diameter. of 21 cubic feet. inches in diameter.
carbon deposits on a jammed open oil excess fuel pressure at
electrodes solenoid the nozzle
Hydraulic coupling Electromagnetic coupling Air operated friction
clutch

Marine Engineer Exam Questions

more abrupt valve action less valve seat wear less valve gear wear

fuel supply to nozzle tip fuel return from nozzle fuel recirculation within
tip the nozzle for cooling
purposes
fluid is entrained with air fluid viscosity decreases coupling is filled with fluid

8.0 to 9.5 10.0 to 11.5 12.0 to 13.5

The rate of evaporation Device "7" does not use The rate of evaporation
is dependent on the level wearing rings, as these will not be affected as
of vacuum maintained are normally positive the standby pump,
within the unit, and not displacement pumps. labeled "8" will be used
the flow of water to the instead.
unit.
as the sole means for to externally discharge solely to
moving the operating the sludge hydrodynamically
slide into the reseated balance the bowl while in
position operation
admit water to the dry throttle the forced draft reduce excess steam
pipe fan output for proper pressure in the boiler
combustion
maintain a frequency of increase or decrease prevent attempts to
60 cycles per second engine speed upon load parallel
demand
dirt acid air
in the down position as a in the up position as a in the up position as the
result of the applied result of the applied only result of securing
spring force during the spring force after the the water flow through
self-cleaning cycle water flow through "P" is "Q"
secured
Lube oil Gasoline Diesel fuel

babbitt iron or steel acids

II only is correct both I and II are correct Neither I or II are correct

Marine Engineer Exam Questions
Under normal The forces acting upon When excessive engine
circumstances, the the relay eliminate the speeds are developed,
spring force prevents the need for governor the operating coil
admission of air to the produced shutdowns, in becomes energized,
cutout device, permitting addition to supplying the shifting the valve and
the operation of the operating medium used reducing the operating
engine under various in conjunction with this pressure to cause an
load conditions. component. engine shutdown.
additional clutch friction one is a spare in the the gear must operate
is required at high event of failure of the both ahead and astern
speeds primary gland
camshaft rotating at the crankshaft rotating at the camshaft rotating at
speed of the crankshaft speed of the camshaft twice the speed of the
crankshaft
The use of end block Removable cylinder All engines shall be
construction for engines liners must be used for provided with an exhaust
developing over 1000 engines developing gas pressure monitoring
brake horsepower. over 1000 brake system.
horsepower.

topmost coil water tank flash chamber

proportioner piston balance piston differential servo piston

They consist of a bellows They automatically They automatically

assembly, linked with a relieve excessive steam restart the burner
snap action switch, pressure by acting as a sequence via the high
through a pressure pilot to the safety valve. water level signal.
adjusting mechanism.

vary the beginning and operate with residual provide maximum fuel
ending of injection fuels only delivery rate
wire mesh fibrous braid metal disks

insulate the zincs to alter replace the zincs if they file the zincs to change
the temperature are 50% consumed the shape
clutch is operating rotor housing is full of fluid is extremely viscous
continuously fluid
drain off the closing drain off the closing drain off the opening
water at the beginning of water at the end of the water at the end of the
the self-cleaning cycle self-cleaning cycle self-cleaning cycle
from under the sliding
bowl bottom
speed is reduced and speed is reduced and speed is sometimes
torque remains torque is increased unchanged while torque
unchanged is increased

Marine Engineer Exam Questions

the torsional vibrations each clutch has a no mechanical
are transmitted directly to separate oil gland for connection exists
the reduction gears reverse operation between the driving and
driven elements
calibrate the fuel pump set the speed droop carefully check for
rack settings adjustment to zero binding in the governor
linkage
provide water flow for bleed off the opening directly discharge
closing the bowl at the water to permit the accumulated sludge from
end of the desludging closing sequence of the the bowl
cycle bowl at the end of the
desludging cycle
piston cooling pumps exhaust valves all of the above

Injection is metered by Injection has a constant Injection will not occur

an external delivery beginning and variable until the helix closes the
valve. ending. delivery valve.
leakage through the uncovered sight glass defect in the sight glass
power piston oil seal ventilation orifice gasket

initiate the bowl closing initially prime the bowl directly position the oil
procedure for the self- emulsion interface
cleaning cycle throughout the operation
of the centrifuge
sensitivity promptness speed droop

delay inflation of the reduce the deflation time reduce the inflation time
clutch being engaged of both clutches of both clutches

provide a means of provide a means for act as a steam sentinel

 adding chemical feed to blowing down the gage valve, if any of the fusible
the boiler water glass plugs should melt

"P" "Q" "R"

overheating because of pneumatic seizure excessive wear on the

slipping shoes thrust bearings

increase only decrease slightly then increase slightly then

returned to original returned to original
speed speed
rotating the cam 180° rotating the cam moving the idler
followers 180° sprockets in the drive
chain
The pump stroke Fuel is metered by the Timing reference marks
determines the amount pump's delivery valve. should be changed.
of fuel injected.

Marine Engineer Exam Questions

F P Q
d. The closing sequence at the end of the
initiated by opening which of the labeled

Remove and examine Check spring Place the thermostatic

the contents of the power compression values element in a container of
pellet. against data given in water at various
manufacturer's operating temperatures
handbook. and note the movement
of the valve stem.
The servomotor control When the reversing lever During periods of rapid
lever provides a fails to produce the response, it is necessary
prepositioned required output, the to use the manually
proportional input to the direction of engine controlled reversing
reversing servomotor rotation is manually control valve to shorten
during engine control controlled by the the time lapse when
tests. reversing control valve. answering bridge
commands.
inlet valve framing EGT monitor exhaust valve bridge
assembly
10 percent 15 percent 20 percent
s from exceeding the rated speed by more than
A B C
purged of trapped air by adjusting the part

an overloaded engine prolonged slow speed weak disc springs

operation
inside micrometer feeler gage adjustable trammel
dial indicator or _____________.
1L/8R 3R/1L 5R/7L

constant beginning and variable beginning and constant beginning and

constant ending variable ending variable ending

"V5" is closed, with "V15" "V5," "V10," "V15," and "V10," "V15," are closed
and "V16" open "V16" are all closed with "V5" and "V16" open
changing the position of replacing the bellows varying air loading
the actuating bulb with a heavier spring pressure to the bellows

reversing control valve running direction control system oil pump

safeguard

inlet valve spring external thread conical speed/surge

prevention device

Marine Engineer Exam Questions

and is a direct reversible is to be fitted with a will not require any
engine, is required to separate overspeed additional overspeed
have an overspeed trip device so adjusted that protection provided a
set to secure the fuel to the speed cannot exceed mechanical type
the engine when its rated the maximum rated governor is used
speed is exceeded by speed by more than 20
more than 15 percent percent
change load without automatically divide and effectively anticipate the
changing speed balance the loads amount of fuel necessary
to bring the engine up to
the proper output to
accept the increased
load
increasing air pressure removing clutch spring adjustment of nut #22
#4
"V5," "V10," "V15," and "V10" and "V16" are "V5," "V10," "V15," and
"V16" are closed open, with "V15" and "V16" are open
"V5" closed
60° 90° 100°
later and end earlier and end later and end earlier

mechanical friction fluid overheating torsional vibration

internal water leaks an oil suction line excessive wear of the

restriction cooling water pump
lead wire red dye indicator lash indicator

"C" and "E" "B" and "E" "B" and "D"

remove all large and ensure a positive flow of ensure that all lube oil
small foreign objects oil at all times has been treated twice

34 46 50

water was present in the the lube oil was not the maximum allowable
oil being properly filtered bearing pressure had
been exceeded
surge chamber accumulator water softener

crankshaft journal bearings camshaft

Marine Engineer Exam Questions

timed for port closing controlled by rack controlled by plunger
movement stroke

Discharge line Supply line In any combination of the

above.
not enough coolant air in the cooling system all of the above
The servomotor is used The component rotates The oil pressure
to lift the fuel pump cams the pilot starting valve developed between the
prior to engine rotation cam in the starting air vanes of this device is
during start up. distributor, as well as the proportional to the
fuel pump cams, in the mechanical energy
required direction and required to drive the
operating position. camshaft and its
associated components.
"I" "H" none of the above are
correct
Water in the fuel system. Cracked cylinder liner. Leaking lube oil cooler.

torque increases with a the coupling rapidly excitation and induction

decrease in excitation responds to sudden power losses appear as
current changes of load a change in torque

compensating needle compensating needle speed limiting device

valve should be opened valve should be adjusted should be adjusted
fully to stabilize operation
B C D

reduction gears rocker arm connecting or piston rod

Constant beginning and Variable beginning and Variable beginning and

constant ending constant ending variable ending
restricted lube oil air leak in the lube oil air leak in the oil pump
passage in the engine cooler suction line

an overhauled water correct amount of no air in the cooling

pump coolant system
3.00 to 1 3.33 to 1 33.0 to 1

heat in the hydraulic fluid vibration in the driving leakage around the ring
member valve

Marine Engineer Exam Questions

sliding bowl bottom and sliding bowl bottom and all of the above
operating slide seal rings operating slide seal rings
should be coated with should be coated with a
main engine lube oil high temperature
lubricating paste
increase governor prevent governor hunting limit engine load
promptness
intermediate disks bottom disk paring disk
increase the rotary cup decrease the back decrease the supply
speed pressure regulating valve steam control valve
opening opening
reduce crankshaft end provide uniform loading increase the strength of
thrust and wear of main the crank webs
bearings
retard as the load remain unchanged always occur at top dead
increases regardless of load center

sensitivity compensation promptness

II only is correct both I and II are correct neither I or II are correct

Engine lubricating oil is A jacking disc is provided The device is actuated

used to rotate the flaps specifically to turn the and maintained in its
(vanes), but the rotation camshaft during normal new position by the
of the drive gear is used operation, as the action application of pneumatic
to maintain contact of the mechanical stops pressure, while during
between the flaps and is concurrent with the maintenance procedures
the stop segments. rotation of the engine. the jacking disc may be
used.

cylinder head scavenging air space cylinder liner

The valves should be set Cylinder relief valves Cylinder relief valves are
to just stop relieving with should only be adjusted no longer required for
the engine running at full by an authorized repair large low speed engines
speed. facility with the due to advancements in
permission of the OCMI. combustion engineering.
engine to slow down propeller to stop clutch to deflate

Marine Engineer Exam Questions

the paring devices have the disks have not been excessive wear of the
been reinstalled in the placed back in the bowl locking ring and/or bowl
wrong order in numerical sequence threads
proportioner piston flyweights (piece #8 and balance piston (piece
(piece #25) moves #9) move inward and the #22) moves downward
upward pilot valve (piece #10)
moves downward
flywheel crankshaft thrust shaft

covering a fuel port in the closing the fuel pump opening the fuel pump
pump barrel delivery valve delivery valve
audible/visual alarm the ships/boats general reserve oil storage tank
alarm
correct amount of cavitation erosion in the clogged sea suction
coolant water jackets strainer
control air leak leaking air starting valve malfunctioning governor

feed pump stops fuel oil solenoid is de- normal water level is
energized established
closed until it is closed to cause the closed until engine
approximately 1/16 of a engine to hunt in order to hunting is eliminated
turn open purge trapped air from
the new oil
light phase discharge dirty oil input port seal water input port
port
metal disc type absorbent type duplex type

II only is correct both I and II are correct neither I or II are correct

statically balanced counter balanced resonantly balanced

timing rate of injection rate of distribution

air when no air cleaners condensation of water breakdown of the

are used vapors lubricating oil by dilution
Benzotriazole found in Eroded baffle in the Low level in expansion
the primary water cooler tank

Marine Engineer Exam Questions

Frictional wear occurs Upon completion of the Once the movement is
each time the flaps shift, a pneumatic signal completed, a pneumatic
(vanes) make contact is diverted to the air start signal is diverted to the
with the stops and is system, simultaneously fuel pump cutout device
compensated by the deactivating the governor to permit engine
ease in which the stops release mechanism. operation.
may be replaced during
the biannual inspection.
Slip is held to a minimum Engine torsional It aids in maintaining
when reversing shaft vibrations to the driven power factor.
rotation. shaft are eliminated.

3 4 6

providing the minimum supplying all the air topping off all receivers
quantity of starting air at necessary to start both at the required design
all times the main engine and an pressures
auxiliary at the same
time
Compensation Idle speed setting Load limit control

II only is correct both I and II are correct neither I or II are correct

elastic engine mounts a vibration damper a cast iron bed plate with
good flexible qualities
normal fuel flow light fuel flow maximum fuel flow

dirty air filter excessive oil pressure excessive oil

temperature

excess chromate a clogged raw water sea cavitation erosion of the

treatment of the jacket suction heat exchanger tubes
water
balance piston compensating needle proportional piston
valve

initiate the bowl closing initially prime the bowl directly position the oil
procedure after the self- emulsion interface
cleaning cycle throughout the operation
of the centrifuge
dry pipe feedwater system generating tubes

The RPM must be The governor has no The RPM will remain the
manually controlled by control over RPM in this same with or without
the load limit knob. mode. load.
propeller shaft speed an intermediate speed a fixed speed
Marine Engineer Exam Questions
irreparable damage to contamination of the premature loss of the
the unit unit's lube oil supply bowl seal liquid
fork-and-blade type rod articulated type rod primary type rod

varying the pump return rotation of the pump rotation of the pump
pressure plunger barrel
the pressure drop across high lube oil sump decrease in oil viscosity
the filter temperature from the filter
an excessive an incorrect thermostatic lube oil in the cooling
accumulation of scale in element operating range water
the heat exchanger
The use of engine driven When forced lubrication Lubrication systems
pre-lube pumps is is used for propulsion where two oil coolers are
permitted on vessels engines, one fitted require a minimum
with propulsion systems independently driven of two temperature
developing less than 500 stand-by pump is to be control devices which
shaft horsepower. provided in addition to may be actuated by
the necessary pumps for similar sensors.
normal operation.
coupling pullout value staybolt strength shear-off coupling

water in the cylinder the driven component is sea suction valve is

seized closed
decrease fluctuate remain constant

slip is produced by second clutch may be idle clutch is fully

backlash in the thrust engaged for additional expanded to hold its gear
bearings torque train stationary

gravity disk inside back pressure is too low incorrect number of disks
diameter is too small have been place in the
disk stack
sliding wedge wrist pin torque bushing

effective pumping stroke pressure drops slowly plunger rotates to the

of the plunger ends until the full stroke is zero delivery position
attained until the next stroke
measure any change in prevent damage to the determine the need for
oil viscosity filter batch filtration
incomplete combustion overloading in all insufficient fuel delivery
in all cylinders cylinders to all cylinders

oil flow sight glasses bearing temperatures all of the above

light phase discharge dirty oil inlet port sealing water inlet port
port
Marine Engineer Exam Questions
filter bag type duplex type absorbent type

harmonic frequency amount of slip resonance

The disks in the stack The disks in the disk If the reassembly of the
must be restacked from stack must be restacked disk stack does not allow
the highest numbered from the lowest the proper seating of the
disk at the bottom, to the numbered disk at the bowl top, disks from the
lowest numbered disk at bottom to the highest mid-portion of the stack
the top. numbered disk at the must be removed.
top.
will stop due to zero fuel will stall upon application speed will remain fairly
supply of load constant despite load
changes
crosshead crank pin crosshead guide

pump plunger diameter plunger helix angle effective pump stroke

Bypass valve setting is Check valve stuck open Fuel dilution of the
too high lubricant
dirty fuel oil filters fuel oil being too heavy high water level in the
(viscous) expansion tank

no additional pumps are an independently driven an independently driven

required if the vessel is pump capable of stand-by pump is not
equipped with two suppling each engine required if a complete
propulsion engines with sufficient quantities duplicate of the attached
clutched to reduction of oil during ahead pump is carried as a
gears through a suitable operations is required spare
arrangement
Separating temperature Controller setpoint Emergency stop button
too low changed not reset

inside diameter of the gland rotates out of clutch begins to rotate

clutch gland decreases contact with the drums with the engine
203°F to less than 212°F 160°F to 180°F selected according to the
oil's viscosity index
balance piston (piece proportioner piston pilot valve (piece #10)
#22) moves upward (piece #25) moves moves downward
downward
fretting corrosion heavy overloading gear misalignment

articulated rod fork-and-blade rod master rod

Marine Engineer Exam Questions

the firing pressure in the a metering helix varying the length of the
cylinder plunger stroke

open the bypass line cut in the lube oil cooler pressurize the lube oil
system
bleed off the opening bleed off the closing directly discharge
water from the operating water from the operating accumulated sludge from
slide slide the bowl
prevent slag protect the inner casing direct the force draft into
accumulation on the and reduce heat loss the space between the
corbels inner and outer casings,
to maintain a pressure
seal
3.10% 3.40% 3.70%

clean oil discharging to a consistent, heavy flow an intermittent flow of

the day tank of separated water to the water to the sludge tank
bilges
Full horsepower is One engine must be Full reversing torque is
available ahead and running ahead and the not available.
astern. other astern.
sluggish response speed droop variations isochronous governing
avoid vaporizing the prevent the fuel oil from prevent the melting of
water entrained in the attaining its flash point the tin plate on the bowl
fuel oil interior
Proper timing Accurate metering Suitable injection rate

Main bearings Piston crowns Cylinder walls

two fuel oil transfer engine driven transfer the capacity of the
pumps, with a combined pumps and only used in engine driven pump
capacity exceeding the constant speed exceed the
maximum comsumption applications consumption rate of the
of the main engine engine to which it is
attached
reduce the accumulation create turbulence increase the heat
of soot deposits on the transfer surface area
tubes
Separating temperature Line to pressure switch All of the above are
too high. PS2 obstructed. correct.

bleed off the closing directly remove directly maintain the

water from the operating accumulated sludge from position of the oil
slide the bowl emulsion interface

Marine Engineer Exam Questions

drain and flush the adjust the compensating adjust the load limit
governor and replace the needle valve
oil
controlling the warm up obtaining maneuvering limiting shock loads
of clutch friction surfaces speeds below engine idle transmitted to the engine
speed in heavy weather

excessive back pressure the failure of the opening not replacing the bowl O-
in the bowl and fuel oil and closing water supply rings that have taken a
break over permanent set
inertia moment from the centerline of the cylinder centerline of the king pin
piston
effective pressure injection duration fuel bypass

after proper oil viscosity during starting after cleaning filters

is reached
a jammed three-way chromate pH too low a high level in the surge
thermostatic valve tank

governor sump spring-loaded piston pressure pilot valve

accumulator assembly
insufficient speed droop excessive sensitivity low governor power
fire-tube boilers water-tube forced all of the above
circulation boilers
400.63 RPM 533.33 RPM 673.51 RPM

rotates at 1000 rpm rotates at 1000 rpm does not require a

higher than the old slower than the old discharge ring when
tubular bowl type tubular bowl type operated as a separator
increase the rate of heat reduce accumulations of direct the flow of gases
transfer carbon deposits

rocker arm to the crankshaft to the gear piston to the crankshaft

camshaft train
maintaining the metering timing fuel injection to distributing the fuel to all
adjustment for a obtain maximum power parts of the combustion
reasonable period under and good fuel economy chamber for proper
all load conditions combustion

energizing the field coils brush contact with the rotating the primary rotor
armature

Marine Engineer Exam Questions

Eroded zinc pencils in Steam formation in the
the heat exchanger. expansion tank.

at least two heaters of the system shall be

approximately equal size designed to permit series
are to be installed or parallel operation

operating slide bowl bottom

Separating temperature Throughput too high.

too high.

installing fins on the increasing the amount of

firesides of water-tubes excess air to the burners

Dog type Friction

excessive speed droop insufficient speed droop

lash adjusters connecting rods
spill port for leakoff check valve in the guide

increased oil thickening at higher

consumption operating temperatures
overloading of that increased blow-by in that
cylinder cylinder
 gravity disk seal ring is operating slide seal ring
defective is defective

increasing the speed increasing the speed

droop setting
the heat of combustion is the volume of steam is
sufficient to remove all small at low pressures
(flash moisture from the steam

produce excessive respond slowly to any

speed response to a load change in engine load
change
accumulated sludge the dosing water

It is a fork assembly. The piston is water

cooled.
The maximum effective The fuel delivered to the
stroke will be attained. cylinder will be
excessive.

Marine Engineer Exam Questions

lube oil pressure saltwater pressure exhaust temperature

increase in fuel economy reduction in lube oil increase in cylinder

viscosity misfiring
schedule 80 standard seamless steel none of the above
insufficient heating of the the three-way valve (V1) insignificant
processed liquid not opening accumulations of sludge
within the bowl
assembly
Engine "B" will operate at Engine "A" will take Engine "B" will operate at
a lower RPM than engine lesser part of the load a higher RPM than
"A" when operating than Engine "B". engine "A".
alone.
thickness gauge bridge gauge to check dial indicator mounted on
between the separated the position of each one flange indicating any
flange faces flange in relation to the misalignment of the other
other flange
the operating water the bowl disk set is the seal ring on the
pressure is too high clogged operating slide is
defective
less than 2 per cent slip axial thrust generated by momentary torsional
between the impeller and the runner pinion shaft vibration transmitted by
runner the driving impeller
reciprocating at the crank straight reciprocation straight rotation
pin, rotary at the piston
pin
The pressure drops and The plunger rotates to The barrel rotates to the
fuel delivery stops. the no fuel position. zero effective stroke
position.
throughput is too high separating temperature clean oil outlet valve has
is currently 95‚C (203‚F) not been fully opened

a cracked water cooled blockage in the heat faulty operation of the

exhaust manifold exchanger thermostat
allow the boiler to cool lock all safety interlock close all manually
completely switches closed operated fuel valves
a malfunctioning an unlocked overspeed floating valves
overload cam trip
clockwise, due to the counterclockwise, due to counterclockwise, due to
bowl rotating the bowl rotating the bowl rotating
counterclockwise clockwise counterclockwise
decrease compression install a larger throw out change the angle of the
on spring #12 weight piece #10 operating face by
machining piece #10

Marine Engineer Exam Questions

excessive gear speed dirt in the oil misalignment of the
gears
prevent crankcase oil maintain crankcase maintain crankcase
leaking out vacuum pressure

Scavenging ports Combustion chambers Double crankshafts

the slope of the fuel cam how the plunger is the number of sleeve
rotated segments engaged with
the rack
lube oil strainer magnets bearing lube oil lube oil pressure to the
temperature bearing
corrosion of the nozzle carbon deposits on the over lubrication of the
tip leakoff inlet needle valve

over 33 mm O.D. will be shall not be used in any are not to be used on
permitted in lieu of instance where the fitting pressure lines in sizes 33
flanged connections is subjected to mm O.D. and over
excessive vibration
Low oil temperature after High oil temperature No discharge.
preheater. after preheater.

automatically supplied equipped with standard cycled on and off in

with more fuel on variable capacity response to steam
demand atomizers demand
maximum power and half speed and normal normal operating
load under normal temperature temperature without a
conditions load
light phase discharge dirty oil inlet port sealing water inlet port
port
Perry filter type simplex type absorbent type

The inside surface of the A nickel-bearing insert is A heat dam design is

piston head is rounded cast into the top ring sometimes used in the
into the ring belt. groove. piston head.
reduces resonance and transmits generates the low
accentuates the turning electromagnetic flux frequency current which
moment irregularities through the primary excites the secondary
circuit electromagnet
Lube oil level Lube oil pressure Water level in the
expansion tank
operating slide paring disk sliding bowl bottom

single-pass, fire-tube, two-pass, water-tube forced circulation, coil-

scotch marine type

Marine Engineer Exam Questions

Rapid declutching is Torque is controlled by Torsional vibrations from
impossible. the volume of oil in the the engine are
coupling. transmitted directly to
the hull by the coupling.
low fuel oil temperature high lube oil viscosity energized glow plugs

is reduced is increased is eliminated

Gear-type coupling Grid spring coupling Block and jaw coupling

increased oil lost compression low oil pressure

consumption
increase the distance of ensure that all heat in the provide a short direct
travel for heat from the piston crown is path for heat to flow from
crown to the top ring conducted to the top ring the crown to the top ring
groove
rotating the fuel injector regulating the speed of changing engine timing
pump plunger the fuel oil transfer pump
lube oil temperature fuel pressure lube oil pressure

decrease lube oil eliminate fuel knock cause sulfuric acid

viscosity formation

solenoid released upon either of the gate or forge constructed under

the failure of engine globe valve type the approval of the
lubrication Marine Inspector
Faulty water solenoid Throughput too high. All of the above are
valve. correct.

at arrow "B" at arrow "C" at arrow "D"

Open the compensating Increase the load limit Compress the

needle valve. adjustment. compensating dashpot
spring.
412.50 RPM 550.00 RPM 45.83 RPM

fire-tube supercritical water-tube natural water-tube express

circulation circulation circulation
The piston pin is free to The upper compression The lower scraper rings
rotate in the bushing. ring is protected from are protected from
overheating by a heat overheating by a heat
dam. dam.
changes the length of the varies the quantity of fuel varies the compression
pump stroke delivered of the delivery valve
spring
3.33 to 1 33 to 1 300 to 1

Marine Engineer Exam Questions

excessive freshwater scale formation on the saltwater mixing with the
corrosion saltwater side freshwater
Power Speed droop Compensation
water-tube forced fire-tube controlled fire-tube express
circulation circulation circulation
an inadequate lube oil plastic flow of the gears fretting corrosion from
film water contamination
condensate from superheated steam from sludge accumulations
feedwater saturated steam from feedwater
17 millimeters 22 millimeters 24 millimeters

dirt fuel oil governor cooling water

no taper what so ever the skirt being tapered the skirt being tapered
and smaller than the and larger than the
crown crown
camshaft main spring rack position

Sludge Gasoline Fuel oil

open, and the coolant open, and the coolant close, and the engine
temperature will increase temperature will coolant temperature will
decrease increase
Check valves are to be Cut-out valves are to be Strainers are to be
located at the service located at the service provided in the fuel oil
tank and be so arranged tanks and be so injection pump discharge
as to be operable from arranged as to be line and shall be capable
the uppermost platform operable from the engine of being cleaned while
of the engine room floor plates. the engine is in
compartment. operation.
Increase temperature at Re-adjust wing tank Confirm preheater set
the settling tank. storage temperatures. point temperature.

refractory and insulation several rows of screen steel baffles

tubes
excessive speed improper warm-up extreme misalignment

Marine Engineer Exam Questions

The furnace will explode. Excess steam will be The furnace will
generated. overheat.
running at half speed running at maximum developing maximum
and at normal power and load under power at normal load
temperature normal conditions
skirt crown plate
pump plunger diameter plunger control rack total pump stroke
position
by design, is drilled with is required by Coast all of the above
a tapered hole so that Guard Regulations as an
boiler water pressure excess pressure
holds the fusible metal in relieving device
the bronze body
II only Both I and II Neither I nor II

Both gears will operate in The teeth on the larger Power can be
the same direction. gear are larger than the transmitted at a 90°
teeth on the smaller angle.
gear.
extensive fireside baffling removable spiral metal all of the above
used to its fullest, gas retarders being
enabling increased heat inserted in the tubes to
transfer rates decrease the gas velocity
to a minimum, thus
extracting the maximum
caloric heat value
area times the stroke, volume times the stroke volume times the stroke,
times the number of times the number of
cylinders cylinders
squeezing sliding slipping

corbell header stay tube crown sheet

14 mm 15 mm 20 mm

To seal the cylinder To provide an additional To provide additional

against leakage of surface for oil cooling. strength for the crown
combustion gases. and lower structure.
rotation of the pump varying the pump supply varying the pump return
barrel pressure pressure
Marine Engineer Exam Questions
curved impeller vane straight impeller vane straight impeller vane
with concentric outlet with concentric housing with tangential housing
excessively high coolant improper temperatures malfunctioning of the
pressure jacket water heater
II only is correct both I and II are correct neither I or II are correct

intermediate disk bottom disk paring disk

assist in the self-cleaning assist in reducing the eliminate the need for a
process thickness of the emulsion discharge ring
interface

adjust the speed droop adjust the speeder spring adjust the compensating
setting travel needle valve
hazy light brown hazy light blue hazy light gray

Positive speed droop Negative speed droop Varying speed droop

allow for the expansion prevent crankcase reduce wearing of the

of the piston during vapors from entering the upper cylinder liner
operation combustion chamber
regulate combustion regulate exhaust change from light to
pressures temperatures heavy fuel

Electric resistance Seamless drawn Straight seam

welded
exhaust pressure air charge density scavenge effect
increases decreases increases

Properly operating steam Excessively fouled heat Steam control valve

trap. exchanger. opened too far.

exhaust temperature cooling water compression pressure

from a particular cylinder temperature
translate heavy load into provide smooth allow construction with
high speed output continuous power fewer gear teeth
transmission
Rapid increase in Rapid increase in Rapid increase in volume
pressure with constant pressure and and decrease in
temperature. temperature. pressure.
high temperature good mixing of fuel and all of the above
air
Metering Effective stroke Penetration

better heat conductivity greater weight per cubic increased resistance to

inch wear
Marine Engineer Exam Questions
rotating the helix of the regulating the lift of the altering the actual length
plunger check valve of the plunger stroke
jaw-type clutch plates multi-plate friction plates two independent
with sliding collars clutches
Carbon will plug the The jacket water The lube oil viscosity will
water cooled exhaust temperature will rise. increase.
manifolds.
Misfiring or rough Damage to the valve All of the above
running
reduced by finer increased by finer nonexistent in the
atomization atomization precombustion chamber
system
ignition quality of fuel fuel/air ratio during turbulence
compression
is connected to the is driven at the highest compensates for
propeller shaft RPM alignment variations
between the engine and
pinion gear
1260 feet/minute 1320 feet/minute 1380 feet/minute

They strive to maintain a They cause a They have poor

constant prime mover proportional drop in sensitivity at high RPM.
speed for all values of prime mover speed as
steady load. the load is increased.
piston carrier pin oil drain passage bearing insert tang

crankshaft governor flywheel

Hardened steel Extra heavy Double extra heavy

increased piston wear increased cylinder lube poor contact between

oil consumption compression rings and
liner
Specific gravity of the Properly operating steam Excessive phosphate
fuel too high. trap in discharge line. treatment of the boiler
water.
horsepower output fuel consumption scavenge effect

volume of the supply line frequency of all of the above

between the control engagement
valve and the clutch
shut down the engine if it display excessive speed maintain a constant
overspeeds droop speed with variations of
load
Maximum combustion Turbulence in the Maximum cylinder firing
pressure is reached cylinder causes a delay pressure is not
before TDC. in ignition. developed until the
piston passes TDC.

Marine Engineer Exam Questions

directional intake ports a Mexican hat piston a precombustion
crown chamber
Cross-scavenging air Trunk type pistons Single reduction gearing
flow
fuel injection cycle quantity of fuel injected fuel pump delivery
pressure
Combustion knock Leaking piston rings Light load

higher jacket water a malfunctioning higher fuel temperature

temperatures thermostat
improve combustion reduce compression decrease power output
pressure
a combination of entirely constant entirely constant volume
constant temperature pressure
and constant pressure
turn the governor drive provide remote control in power the generator
shaft during start-up speed adjustment synchronizing lamps
remove moisture inject fuel oil into the relieve excess pressure
accumulation from the cylinder in the cylinder
cylinder prior to starting
a variable maximum fuel pivotless centrifugal a proportional action
stop flyballs compensation
mechanism
permanence turbulence atomization

single-acting barrel double-acting trunk single-acting trunk piston

piston piston
delivery valve governor speed plunger crossbar

near the middle of shaft between #2 and #4 at #2

#1 and #3
dangerous thermal excessive crosshead change in fuel cetane
expansion of the piston temperatures number
skirt
mechanical cycle of period of two combustion cycle of two events
operation cycles
rotate the fly weights at a transmit speeder spring transmit speeder rod
speed proportional to compression to the fly motion to the rotating
engine speed weights bushing
When the ahead clutch Control air is supplied so When the idle clutch
gland is engaged, the that both clutch glands gland is deflated, its
astern clutch gland is not inflate simultaneously. friction blocks ride on the
rotating. drum.
d e f

Marine Engineer Exam Questions

bottom disk sludge separator bowl body

air starting valve air inlet valve cylinder relief valve

skirt crown plate

check for sludge on the check that the fuel return set up the fuel rack
pump barrel passages are clear calibration in cubic
millimeters
The purifier must be The purifier will gradually The bowl will eventually
operated at a higher change operation to fill with water.
speed. separation.
viscosity temperature foaming

All high pressure piping All storage tanks The piping is to be

shall be of the double connected to the leakoff effectively shielded and
lined type, with the outer piping of fuel injection secured to prevent fuel
leakoff line suitably systems shall be or fuel mist from
channeled to a provided with high level reaching a source of
dedicated tank. alarms and sufficient ignition on the engine or
means for emptying. its surroundings.

Incorrect steam control Too high a temperature Too low a temperature in

valve setting. in settling tank. day tank.

fuel penetration fuel spray angle fuel injection rate

Control rack Weights acted on by Isochronous droop

centrifugal force spring
water vapor and carbon nitrogen and carbon water vapor and carbon
monoxide monoxide dioxide
compensate for gross are able to transmit high will rapidly disconnect
misalignment in the drive torque, even where slight the engine from the line
train misalignment exists shaft
semi-floating full floating anchored

remove the fuel pump secure the engine, run engine at idle,
crosshead cover and remove the fuel pump remove cover, and
observe the rack setting crosshead cover, and secure engine while
with the engine running compare rack setting to observing rack
master pump setting movement
lube oil pump discharge bottom of the lube oil outlet from the lube oil
line sump header
Leaks in the cooler tube Operating the engine A punctured sea water
nest. while maintaining a high strainer supplying
sea water outlet cooling water to the heat
temperature. exchanger.

Marine Engineer Exam Questions

The piping shall be Most diesel injection Return piping is required
directed to the fuel oil systems do not develop to be protected by relief
day tank, in addition it high pressures in their valves which relieve to
shall enter below the return lines due to the diesel oil settling
normal operating level of regulations prohibiting tank.
the tank. installation of valves in
these lines.
Improper cleaning of Uneven sludge deposits All of the above are
bowl. in sludge space. correct.

an overloaded cylinder a clogged injector nozzle all of the above

preignition interrupted scavenging reduced scavenging
When engine load If the centrifugal force When the centrifugal
increases, the governor developed by the rotation force developed by the
weights (piece #9) turn of the governor weights rotation of the governor
faster. is equal to the force of weights is substantially
the governor spring, the greater than the force of
engine will stop. the governor spring, the
fuel rack will decrease
fuel.
ensure engine vibrations permit the engine to maintain engine thrust
correspond to the natural expand away from the bearing clearances
frequency of the hull driven equipment as the
engine heats up and
 expands
piston pin cup snap ring bronze bushing

cam action hydraulic action spring action

Straining Spraying Atomizing

er one-throughout the upper one at TDC opposite the near the middle of the
half of the liner thrust side of the liner thrust side of the liner
Hydraulic flexible Pneudraulic flexible Fluid drive

An increase in A decrease in A decrease in ignition lag

compression ratio will compression ratio will will increase the
decrease the ignition lag. decrease the ignition lag. compression ratio.
complete fuel/air mixing minimal fuel penetration proper fuel timing

2 3 4

sensitivity stability promptness

Marine Engineer Exam Questions

The start of injection will The nozzle will permit The spray pattern will be
be retarded. fuel to dribble. distorted.

seal welding a press fitting a tongue-and-groove

carbon copper ash

high temperature and a low temperature and a low temperature and a

low viscosity high viscosity low viscosity
exhaust valve guides engine cylinder liners engine exhaust manifold

increased exhaust early fuel injection timing low scavenge air

system back pressure temperature
low intake air low exhaust pressure high scavenge air
temperature pressure
isochronous governing high sensitivity governing relay-type governing
turbocharger injector nozzle tip carburetor

less fuel will enter the lower will be cylinder more complete will be
cylinder compression fuel combustion
temperatures
two-stroke/cycle engine four-stroke/cycle engine reverse cycle engine

Stationary Full floating Semi-floating

return this oil to the prevent contamination of ascertain an accurate

proper storage tank lubricating oil by fuel oil measurement of this
leakage
the rotating action of the new foundation bolt a failure to reset the
centrifugal switch assemblies and emergency stop button
dampeners
taking compression inspecting the valves comparing exhaust
readings visually pyrometer readings
Direct linkage between A servomotor A compensating device
the ball-head and fuel
rack
Using a fuel oil with a Decreasing the air Reducing the injected
higher cetane number. charge temperature. fuel oil droplet size.
set that is clutched in will idling gears rotate in a synchromesh coupling
rotate as idlers driven direction opposite to their will maintain transition
from the main gear rotation when carrying torque control
load
engine and the pinion line shaft and tailshaft pinion and the bull gear

Marine Engineer Exam Questions

distribution of the load amount of fuel indicated horsepower of
between engine penetration into the the engine cylinders
cylinders engine cylinders
After air in the cylinder is After combustion gases As air is taken into the
compressed. in the cylinder have cylinder.
expanded.
thrust washer piston carrier wrist pin

setting of the pump compressibility of the fuel position of the needle

plunger valve
turn the three-way valve open the bypass valve close the isolation valves
and then close the and then open the
isolation valves bypass valve
clogged sea strainer blown head gasket cracked head

fuel spray angle fuel injection rate combustion in that

cylinder
helical gear pinion gear spur gear

range of inflammability theoretical fuel/air ratio length of the ignition

delay period
governor promptness speed droop isochronous governing

varying the speed of the adjusting the changing the timing of

turbocharger compression ratio the fuel injection
camshaft
shape of combustion turbulence in combustion all of the above
space space
underneath the piston at the base of the piston inside the cylinder liner
crown skirt cooling water jacket
ignition delay moving parts control

the lube oil to be allowed the cleaning fluid used to a new cover gasket to be
to cool before removing be more viscous than the installed when
the basket lube oil reassembling the unit
A fouled sea chest. A restricted water Air entrained in the
passage in the engine. cooling water.
the machine will continue the shoot cycle should there are excessive
to operate indefinitely be automatically be quantities of mirco-
initiated at more frequent organisms in the fuel
intervals supply
To insure pumpimg To increase fuel To keep exhaust
losses are held to a consumption. temperature low.

Marine Engineer Exam Questions

four-stroke/cycle diesel two-stroke/cycle diesel
engine exhaust is cooled engines have a lower
by scavenging air M.E.P. than four-
stroke/cycle diesel
engines

smoother engine combustion knock

operation
1 2 3
crown wrist pin

spring force fuel oil pressure

low lube oil temperature excessive oil

consumption
carrying the expansion a totally clogged impeller
tank water level too high in the cooling water
pump
Babbitt Sleeved

turbocharger speed fuel injection pumps

low combustion plugged fuel nozzle

temperature holes
pressure readings pyrometer readings

aid in silencing the increase the mean

exhaust noise effective pressure
helically cut gear teeth sleeve bearings

supply oil to the cylinder allow excess oil from the

liner liner to drain back to the
sump
cylinder compression fuel oil injection pressure
temperature may be too may not be high enough
high
excessive lube oil pump excessive lube oil flow
discharge pressure
Cavitation in the cooling Opened vent in the
water pump. cooling system.
Propulsion engines with At least two independent
bores exceeding 200 mm sea suctions are to be
are to be fitted with a provided for supplying
means to display the water to the engine
cooling water jackets or to the heat
temperature of each exchangers.

Marine Engineer Exam Questions

The separator will fail to An alarm for "emergency The unit will experience
reach rated speed. stopping or vibrations" substantial damage.
 may be indicated by the
program unit alarm
panel.
governor's speed of ability to maintain percent of speed change
response to variations in desired engine speed necessary for corrective
engine load without speed action by the fuel control
fluctuation
An increase in intake air An increase in coolant An increase in
temperature will increase temperature will combustion chamber
ignition delay. decrease ignition delay. turbulence will increase
ignition delay.
supercharging scavenging turbulence

the elimination of valve improved atomization a decrease in cylinder

wear blow-by
radiated through the transferred to water conducted through the
engine block cooled cylinder walls piston crown
degree of cylinder air maximum pressure in the quantity of the fuel to be
turbulence engine cylinders during injected
injection
holed fouled clean

double-acting engine opposed pistons engine single-acting engine

I only is correct II only is correct both I and II are correct

using fuel oil with low a badly worn piston pin a loose flywheel key
cetane number
reduce the engine driven retard the fuel injector increase the fuel rack
fuel pump outlet timing to reduce power setting
pressure
Exhaust and scavenging Scavenging and Ignition and expansion
compression
turbocharger efficiency engine power output carbon deposits on fuel
injectors
Piece #8 Piece #9 Piece #13

Marine Engineer Exam Questions

Length of the piston skirt Positive pressure from Lower liner seals
the blower
Multi-hole type nozzles Most closed nozzles The pintle type nozzles
are only suitable for use open inward under the are most susceptible to
in engines with pressure acting on the carbon deposits building
precombustion differential area of the up in and around the
chambers. needle valve. orifice.
check the lube oil pump check the lube oil header check the pressure drop
discharge pressure pressure across the filter
cracked cylinder head leaking exhaust valve worn piston ring

only after the engine whenever the secondary with the approval of the
room control station is station is switched to chief engineer only
switched to "bridge "bridge control"
control"
excessive cooling water an overheated bearing excessive lube oil in the
temperature crankcase
Propulsion engines with Each totally enclosed Drain cocks are to be
bores over 200 mm are cooling system shall be provided at the lowest
to be fitted with cooling provided with a suitable points of all cylinder
water thermometers at head tank. water jackets.
each cylinder.
The vibration-damping The top bearing spring is All of the above are
rubber washers are broken. correct.
damaged.

High temperatures Damage to the Inaccurate temperature

developing in the pyrometer. readings.
exhaust.
a lean fuel/air mixture excess fuel in the rapid vaporization of
combustion chamber injected fuel droplets
tape rod bosses snap rings offset drilling

increasing the injector removing shims from increasing compression

nozzle orifice size under the nozzle spring on the pressure spring
slowly decrease remain the same have no effect on filter
operation

water draining from the combustion gases excessive fuel oil

fuel leak off valves venting at the expansion consumption
tank
engine room control captain's office chief engineer's office
station
Marine Engineer Exam Questions
with a leaking crankcase equipped with a equipped with a
inspection cover gasket crankcase exhaust turbocharger which
blower which vents to utilizes a gear drive
fresh air
to a point not lower than at a location segregated and shall be protected by
the highest load line from other ventilation a rain guard or similar
systems device
that the bowl is fouled an extremely high faulty seals between the
and cleaning is percentage of water in sliding bowl bottom and
necessary the fuel the paring disc
assembly
heavy fuel injection an obstruction in the a fouled intake manifold
exhaust silencer
transmit engine thrust to absorb vibrations in the prevent propeller thrust
the propeller shaft propeller shafting from being transmitted to
the hull
against the crosshead against the crosshead away from the crosshead
during the compression during the power and during the power and
stroke and away from the compression strokes compression strokes
crosshead during the
power stroke
spill deflector check valve spray tip of the injector

piston side thrust the efficiency of the compression pressure

engine
combustion gases lower temperature at the water draining from the
venting at the expansion cylinder head water fuel leakoff lines
tank discharge
prolonged injection lag reduced ignition lag prolonged ignition lag

Poor fuel economy Combustion knock Crankcase explosion

The heat process which The number of piston The mechanical

produces the force to strokes involved. equivalent of heat.
initiate the movement of
the engine parts.
after burning ratio preignition lag ignition delay
they can only be used they eliminate the need they are connected to the
with one engine at a time for controllable pitch engine with a flexible
propellers coupling
attach a tachometer to provide operating air prevent lube oil from
indicate relative speed pressure to the clutch leaking out of the gear
glands case from the roller
bearings
formed by the piston in between the crankarm between the master and
relation to the piston pin and crankpin link connecting rods
Marine Engineer Exam Questions
duration of injection will quantity of fuel injected quantity of fuel injected
always be reduced will always be decreased tends to be increased

temperature is too low pump discharge pump capacity is greater

pressure is higher than than the system's needs
the system's pressure
installation of undersized operating the engine at restricted cooling water
sealing rings low loads passages
it is of the water jacketed it is used as an special provision is made
type emergency generator by the Chief Engineer
Implosion Misfire Dieseling

No discharge feedback Back pressure in oil Oil density too high due
signal from EPC 30. outlet too high. to low operating
temperatures.
more air gets into the it develops twice as higher combustion
cylinder each stroke many power strokes at pressure is developed
the same speed
a clogged air filter excessively early fuel malfunctioning valves
injection
"3" "21" "2"

seal against crankcase lessen the wear on allow for the greater
vapors aluminum parts of the expansion rate of
cylinder aluminum
the condition of the ambient temperature all of the above
engine
cooled to increase pumped rapidly through pumped through the filter
viscosity the filter under high pressure
piping joints pump seals leaking all of the above

high ambient air low lube oil pressure high exhaust system
temperature back pressure
Fuel dilution of the lube Excessive engine Improper lube oil
oil speeds viscosity
All engines connected to The engines will be fitted All of the above are
controllable pitch with a means to display correct.
propellers shall be of the the exhaust gas
direct reversible type. temperature of each
cylinder.
Leakage from the sealing No cooling air supply is All of the above are
ring occurs in the bowl provided to the liquid correct.
periphery. sensor.
The air intake filter is The exhaust back The fuel pump rack
missing. pressure is too high. setting is too far in.

Marine Engineer Exam Questions

droop dead banding dash potting

To add power to the To keep the engine firmly To keep moving engine
engine. attached to its supporting parts in their proper
base. relative positions.
fuel oil pump will fuel oil transfer pumps fuel injectors may be
overspeed if dirt is not cannot tolerate small damaged by foreign
removed amounts of grit in the oil particles in the fuel oil
under high pressure under low pressure heated to reduce
viscosity
require the overspeed increase the governor increase the speed
trip setting to be adjusted output power droop
Lube oil pressure and Jacket water pressure Engine overspeed
temperature and temperature

the splashing of the dilution of crankcase broken fuel lines

lubrication oil by the oil with particles of spraying oil on the
crankshaft combustion crankcase
A B C

low coolant temperature insufficient fuel high ambient

temperature
Hydraulic oil pressure Servomotor action Flyweight centrifugal
force
Check the pump rack Examine the water outlet Replace the fuel injector
setting. header for evidence of nozzle.
blockage.

promote piston ring prevent rapid wear on provide better lubrication

seating in the cylinder the ring face of the piston ring
power and intake intake and exhaust exhaust and
compression
allow windage to exist for avoid a buildup of avoid lube oil foaming
cooling the gears pressure within the gear within the case
case
Hydraulic stress and Hot spots will develop. Fuel oil viscosity will
distortion will develop. increased.

cylindrical in shape with opened and made provided with automatic

service connections available for inspection drain traps for the
located at the top and during biannual removal of moisture
bottom inspections

Marine Engineer Exam Questions

resonant with the critical fore and aft horizontal whipping
crankshaft natural crankshaft vibrations motions of the crankshaft
frequency
A06: liquid indication. Low pressure in oil inlet. Low pressure in oil
outlet.

Just before TDC by heat Just before TDC by At TDC by spark ignition.
generated by spark ignition.
compression.
Malfunctioning valves Leaking fuel injector Excessively early fuel
nozzle injection
Transmits propeller Keeps spring bearings in Prevents main reduction
thrust to the hull. line. gear axial movement.

The oil control ring face The ring diameter, when Oil control rings maintain
is machined at an angle free, is machined slightly continuous oil film.
of 10 degrees. smaller than the cylinder
bore to allow for
expansion at high
combustion
temperatures.
long periods of engine metallic contact between hard carbon deposit and
overload nozzles and cylinder varnish on the nozzles
heads
The housing is removed The T-handle is rotated. The strainer element is
and the element is removed, cleaned in
cleaned with a solvent. kerosene or solvent, and
dried with an air brush.
priming in the expansion failure of raw water pump local overheating and/or
tank shaft seals internal corrosion
ignition timing precombustion lag ignition delay

damage to cylinder excessive fuel injection excessive air valve lift

heads and pistons
caused by a mechanical caused by high fuel normal for these
defect in one cylinder injection pressures conditions

The edges are above the The edges are above the The edges are in
ports and oil under ports and oil bleeds to constant motion going
pressure supplies the the sump. both above and below
power piston. the ports and governor
stability is maintained.
injection timing is too overloading of the engine too low of a compression
early ratio
stability promptness speed droop

Marine Engineer Exam Questions

flyweight centrifugal force flyweight centrifugal force speeder spring alone
is balanced by spring is balanced by hydraulic actuates the fuel control
force pressure rod
avoid low cooling water avoid prolonged make certain the gasket
temperatures overloading of the engine seal between the nozzle
and cylinder head is tight
One turn of the T-handle Particles of solid matter The strainer discs,
is sufficient for cleaning larger than the distances spacers, and scraper
the discs. between the discs flow blades are magnetic to
up through the inner prevent small metal
space. particles from damaging
the reduction gear.
leak in the primary broken raw water pump burned or cracked piston
cooling system shaft in one cylinder
will incorporate the use will not be approved for and satisfy U.S.C.G.
of an automatic classification purposes regulations shall be
unloading device approved

the engine may the flammable vapors will all of the above
overspeed and the result in an excessively
normal governor or rich mixture which will
overspeed trip will not be increase the brake
able to secure the engine horsepower output
AO7: transducer fault. Low pressure in oil inlet. Low pressure in oil
 outlet.

The oil inlet paring disc In this arrangement an This purifier as well as
creates a low pressure in independent pump is most others will be
the suction piping. utilized. installed in the lower
engine room to make
use of gravitational
forces.
The lower reversing gear The upper reversing gear The main bull gear is
comes in direct contact comes in direct contact located to left of the main
with the main gear. with the main pinion. input pinion shaft.
increased slip and high torque transmittal low axial thrust
maneuvering capability under limited transmission under
misalignment conditions minimal alignment
irregularities
cylinder liner oil film bottom of the ring groove back of the ring groove
increase fuel delivery prevent preignition avoid carbonization of
rate and economy the nozzle tips
energy cell turbulence or swirl air cell
chamber
Defective oil cooler core. Excessive lube oil Overfilled lube oil
pressure. system.

Marine Engineer Exam Questions

Helical Cyclical Spur

the nozzle should not the nozzle should the oil spray could cause
make any noise when operate within plus or blood poisoning if the
pressure is applied minus 500 pounds of the spray penetrates the
specified opening skin of the operator
pressure
two air starting one control air container one additional means of
containers of and one starting air starting the main engine
approximately equal size container
submerging oil wiper pressure lubricating spraying oil directly on
rings in an oil bath through internal the thrust collar and
passages shoes
injectors the heat of compression increasing jacket water
temperatures
ignition delay compression ignition turbulence lag

prevent engine friction transmit heat from the remove oil from the
losses piston to the cylinder cylinder combustion
 liner space
corrosion of the nozzle carbon deposits on the inadequate lubrication of
tip nozzle tip the needle valve
variable speed governor isochronous hunting nutating disk governor
governor
pilot valve initially moves accumulator pressure is actuating compensating
down applied to the full piston rotates the
exposed surface area of terminal shaft in the
the power piston increase fuel direction
Rapid pressure increase Rapid volume increase No volume increase
during combustion. during combustion. during combustion.
toxic fumes explosion blood poisoning

excessive bearing play overloading of the all of the above

within the running gear cylinder

Poured bearings Sleeved bearings Tapered roller bearings

increase the cooling increase the lube oil adjust the fuel rack
water flow pressure

overcooling of the eroded muffler baffle high injection pressure

exhaust manifold plates
reduce specific fuel reduce the probability of allow for ring expansion
consumption ring fracture
intake air should be lube oil outlet none of the above
preheated temperature should be
increased 20‚ above

Marine Engineer Exam Questions

speeder spring force compensation needle centrifugal force on the
valve clearance flyweights
poor heat transfer mechanical lubricator camshaft seizure
failure
an exhaust manifold leak the turbocharger is a normal condition
fouled

serious fire hazard possibility of pollution poor combustion which

will occur in that cylinder
variable speed governor constant speed governor load limiting governor

Check for the correct oil Release the bowl brake All of the above are
level in the gear housing. and confirm proper valve correct.
line up.
Conical Cylindrical Helical

the pressure of gases specially designed parts the concept of reciprocity

developed connected to a shaft

absorb the piston side prevent cylinder liner prevent excess lubricant
thrust wear from reaching the
combustion space
chattering sound when squealing sound midway popping sound when the
the nozzle closes in the pump stroke nozzle opens
on the exhaust manifold on all devices subject to in way of the starting
prior to the inlet of the the by-products of valve of each cylinder for
turbochargers combustion or lubrication direct reversing engines
system vapors having a main starting
manifold
high coolant pressure leaking fuel injector cracked cylinder head or
liner
Check the separator by Look for oil and water All of the above
listening for mechanical leaks in addition to other procedures should be
sounds. irregularities. followed.
faulty combustion in that sluggish piston ring excessive piston cooling
cylinder action

turned by the shaft, and lubricated by a ring oiler hard chrome-faced to

the thrust collar is withstand wear
stationary
create a high turbulence allow the spray to hit the make a blast in the main
within the main piston rim rather than the chamber prior to the
combustion chamber cooler cylinder wall piston expansion stroke

Base ring Thrust pins Leveling plates

Marine Engineer Exam Questions

piston rings piston skirts cylinder liners

nozzle orifices are needle valve is defective needle valve is seating

eroded properly

burn fuel in a combustion burn fuel in a chamber use a continuous

chamber that moves where its energy moves combustion process to
back and forth a piston back and forth impart rotary motion to
the pistons
double reduction triple reduction quadruple reduction

The floating lever moves The floating lever The floating lever shifts
down at the speeder rod remains stationary. to the left.
end.
overspeeding the engine securing the fuel supply securing the ignition
system
Excess oil under high The speed droop lever The compensating
pressure is released spring prevents the mechanism provides
from the spring loaded engine from racing or positive control to lower
accumulators to the hunting by arresting the engine speed as load is
sump. movement of the power increased.
piston after a speed
change.
atomization of the fuel penetration of the fuel all of the above

Single reduction, single Single reduction, double Double reduction, double

input input input, articulated

A two-stroke/cycle "V" An in-line two- An opposed piston

type engine stroke/cycle engine engine
controls piston ring increases ring wearing decreases combustion
tension quality gas leakage
eight consecutive starts ten consecutive starts twelve consecutive starts

rotate the T-handle wire brush the disks to blow compressed air
spindle one turn remove sludge through the disks
tighten all foundation apply heat to the sludge check gear housing oil
bolts tank level
Drain the hydraulic fluid Block the flow of cooling Secure the fuel supply
from the governor sump. air to the radiator. and block the air intake

internal energy external energy mechanical energy

reduce fuel booster adjust the fuel rack retard fuel injector timing
pump pressure
 Marine Engineer Exam Questions
when fuel injection has when fuel vaporization should efficiently
been completed has been completed continue through the
after burning period in all
properly designed
engines
bottom back top

removes combustible prevents the formation of cools lubricating oil

gases from the combustible gases in the
crankcase crankcase
Low loading of the Excessive cooling of that Sluggish ring action on
cylinder piston the piston

checking for leaks checking temperatures listening for abnormal

and pressures noises
compression pressures lube oil is diluted with cranking speed is too low
are below normal fuel oil
Masked exhaust valves Special piston rings Turbocharger

water supply fuel oil supply lube oil supply

135264 153624 142365

A B C

noise coming from the air an overheated air supply continuous operation of
starting valve pipe to the cylinder head the starting air
compressor
high exhaust high lube oil temperature low turbocharge speed
temperature
cylinder lubricant is less blow-by as the pin to keep the ring ends
spread more evenly on seals the end gap from catching in the
the cylinder wall scavenging ports
high firing pressure corrosion of the nozzle low fuel pressure
tip
fuel dribbling from burning fuel with a high burning fuel with a high
leaking fuel injectors carbon content vanadium content
39.7 psig (273.7 kPa) 79.4 psig (547.4 kPa) 476.4 psig (3284.6 kPa)

fa agb C

torque limiter overspeed trip overspeed governor

Marine Engineer Exam Questions
for continued operation to provide a to enable six consecutive
of these systems after nonreversible engine a starts of a reversible
capacity for the required minimum of twelve engine
number of consecutive consecutive starts
starts has been used
Turbulence is eliminated. Lower mean effective Excellent control of
pressures are combustion can be
developed. attained.
During operation at rated During acceleration All of the above
speed, but low power
output

The valve is Tappet clearance is Cold valve clearance is

mechanically adjusted at measured between measured between
point "E". points "A" and "B". components "C" and "D".
decrease contact increase contact permit excess oil to drain
pressure between ring pressure between ring back to the sump
and cylinder wall and cylinder wall
1291 ft/min (393 m/min) 2582 ft/min (787 m/min) 7749 ft/min (2362 m/min)

remove the disc element rotate the disc element rotate the knife-edge
and immerse it in and drain off the cleaner blades and drain
kerosene sediment off the sediment
fire improperly lose oil pressure overheat rapidly

higher peak cylinder higher developed BMEP smoother combustion

pressures
shutting off the fuel increasing the engine overspeeding the engine
supply back pressure
cylinder volumes at top engine cylinder size to the number of
dead center and at piston size compression strokes for
bottom dead center a given horsepower
an increase in the high exhaust pressure an overheated air supply
starting air manifold line to that cylinder
pressure
burning lube oil an overloaded engine insufficient combustion
air
B C D

quantity of fuel injected start of injection is duration of injection will

will always be increased advanced always be greater
opening the drain plug manually operating a flushing with any
and blowing through the built-in scraper and approved solvent then
filter draining the filter draining the system

Marine Engineer Exam Questions

remove all moisture from lubricate the air supply reduce the temperature
the system of the air supply as a
result of the heat of
compression
stack compressor thread alignment device bowl hood

at each control station in the chief engineer's in the captain's quarters

quarters
later and closing earlier later and closing later earlier and closing earlier

the engine is overloaded the engine is cold there is too much lube oil
in the cylinders
I II III

allow fuel injection do not contain the fuel contain the major portion
directly into the space injector nozzle tip of the total clearance
above the piston volume
allow proper lubrication reduce the amount of scrape excess lube oil
of cylinders and lube oil burned in the from the liner on the
compression rings combustion chamber downstroke
The starting air main No protection is An isolation non-return
shall be protected by the necessary because all valve is to be installed at
use of a rupture disc. starting air valves are the starting air supply
designed similar to check connection to each
valves. engine.
bowl spindle nut braking mechanism pump drive coupling

Operate two exhaust Lubricate the exhaust Ensure positive closing

valves from one rocker valves through internal action of the exhaust
arm. lube oil passages. valves.
two crankshaft two power strokes in a one power stroke in a
revolutions in a two- two-stroke/cycle engine two-stroke/cycle engine
stroke/cycle engine
temperature pressure engine speed

Device 17A needs to be The critical speed range To increase the critical
replaced, repaired, or will be varied as the speed range of the
reset to the setpoint setpoints of 17A or 17B engine, reduce the
coinciding with the RPM are reset, therefore, setpoint of 17A and 17B
value for the low end of another segment of the respectively, to .80 bar
the critical speed range. speed control circuit and 1.0 bar.
must be repaired.
1300 ft/min 1400 ft/min 1450 ft/min

Marine Engineer Exam Questions

low ambient air pressure high lube oil pump high fuel oil booster
pressure pump pressure
at rated engine RPM at 95% of rated engine at 95% of a properly
RPM adjusted governor RPM
with the engine under full
load
reduce the amount of transmit heat from the damp out fluctuations of
lube oil burned in the piston to the cylinder the piston side thrust
combustion chamber liner
Increasing the Increasing the effective Increasing the
compression ratios. plunger stroke. turbocharger gear ratio.
flash point relative detergency TBN number
remaining
Heat of compression Carburetor Glow plug

a malfunctioning loss of accumulator air in the hydraulic

overrunning clutch precharge system
a leaking fuel nozzle late fuel injection plugged oil-scraper ring
check valve holes
before TDC after TDC during air starting
Two Four Eight

a loose injector inlet late fuel injection high injection pressure

connection
decrease injection lag increase ignition delay aid in exhausting burnt
gases
pump oil into the prevent excessive allow hydraulic oil film
combustion space for lubricating oil formation on the cylinder
cylinder cooling consumption
Single hole Multi-hole Open

decreased pour point increased flash point increased viscosity

exhaust stroke compression stroke power stroke
rotating chronomatic balanced-diaphragm sliding camshaft
drum indicator
Overspeed governor Overspeed trip Overspeed relay

two-stroke/cycle double four-stroke/cycle single four-stroke/cycle double

acting acting acting
brake horsepower net horsepower friction horsepower

the removal of expended the admission of air to All of the above

combustion gases the cylinder

Marine Engineer Exam Questions

90°-120° 130°-160° 180°-190°

maintain an oil film on keep excess oil away help cushion piston skirt
the lower liner where from intake and exhaust side thrust by providing a
scuffing is prevalent ports hydrodynamic oil wedge
a special cleaning wire a copper wire brush a shaved wooden dowel

filtered strained changed

two-stroke/cycle engine four-stroke/cycle engine two-stroke/cycle engine

at the end of the at the end of the exhaust at the beginning of the
compression stroke stroke power stroke
air start valve multi-stage fuel injector precombustion chamber

stop the engine by slow the engine but not slow the engine to half of
closing the air intake stop it normal load

Continuous operation of Zero air pressure in the Overheated starting air

the starting air air starting system. pipe to the cylinder head.
compressor.
a scored cylinder liner water leaking into a low combustion
cylinder temperature
Bright appearance. Thin layer of lacquer. Thick oily film.

quarterly every 6 months yearly

prevent excessive provide metal-to-metal assure a positive means

lubrication from reaching contact to seal the of scraping carbon
the combustion space cylinder against blow-by accumulation from the
cylinder
incomplete combustion decreased cylinder wall coking and blocking of
and decreased fuel temperatures and the fuel nozzles
consumption increased exhaust gas
temperatures
use the settler to remove remove the fuel oil by drain and then renew the
the fuel oil centrifuging lube oil supply
high cranking speed excessive fuel dilution of high compression
lube oil pressure
overspeed and cause fail to develop normal cause the pinion to fail
serious damage speed
has low lubricating oil exceeds a set maximum has high cooling water
pressure speed temperature

Marine Engineer Exam Questions

at the supply inlet to the on the exhaust manifold on all devices subject to
starting air manifold for prior to the inlet of the the by-products of
non-reversing engines turbocharger combustion or lubrication
system vapors

not be indicated in shut off the oil feed to the cause the separator to
numerical order separator automatically enter the
sludge discharge cycle
450 ft/min 900 ft/min 1500 ft/min

open earlier than normal close earlier than normal remain open for a shorter
duration
wide compression rings oil rings are located dense chromium plating
are used above the piston pin is used on all piston rings

gasoline carbon solvent degreasing compound

contaminated with contaminated with diluted with fuel oil

sludge carbon
thermal efficiency mechanical efficiency brake thermal efficiency

obtain injection lag help mix fuel and air increase combustion
pressure
move the piston rod to move the piston rod to decrease allowing the
the left the right spring to move the piston
rod to the right
method of supplying air cooling system method of igniting fuel

on the intake stroke on top dead center on the power stroke

excessive cylinder a lugging engine a leaking cylinder liner

lubrication
Pressure and Pressure and Pressure decreases and
temperature decrease temperature increase temperature increases
decrease piston side allow for thermal permit drainage of
thrust pressure expansion of the ring excess oil to the engine
within the ring land sump
corrosion of the spray clogging of the orifices distortion of the spray
nozzle pattern
changed centrifuged filtered

78.26 RPM 463.77 RPM 65.22 RPM

Marine Engineer Exam Questions

low compression an overloaded engine clogged drain holes in
pressure and high the oil control rings
exhaust temperature
replace piece #10 decrease compression increase compression on
on spring #12 spring #12

similar to those used in located in the oil outlet essential in monitoring

sonar systems piping the amount a water
entering the separator
collapsed hydraulic valve worn valve guides excessive crankcase
lifters vacuum
the expansion ratio will combustion will be thermal efficiency will
decrease slowed down decrease
one complete crankshaft two crankshaft two power strokes in a
revolution in a two- revolutions in a two- two-stroke/cycle engine
stroke/cycle engine stroke/cycle engine
obtain increased strength reduce oil pumping keep the ring from
sticking in the grove
feel the high pressure check the cylinder frequently check the
fuel line exhausts for white smoke cylinder exhaust
temperature
fuel oil dilution is 5% it begins to turn black the exhaust shows traces
 of blue smoke
top dead center bottom dead center the beginning of injection

wide open only partially open only closed only

an increase in the oil the counterclockwise the increase in

pressure acting against rotation of the butterfly compression on the
the piston rod valve to shut off the air to spring
the engine
controllable pitch generator set winch
propeller
Temperature of the Friction within the engine Mechanical condition of
intake air the supercharger
Crankshaft revolution Type of engine (diesel or Distance a piston travels
gasoline) during a stroke
high cetane number insufficient compression low lube oil viscosity
seal the space between transmit heat from the reduce the amount of
the piston and liner piston to the cylinder combustion gas blow-by
liner
A bent fuel needle. A defective nozzle tip A distorted valve body.
seat.
An extremely low An extremely high The oil appears black in
neutralization number. precipitation number. color.

Marine Engineer Exam Questions

As the water content in The capacitor completes All of the above are
the oil decreases, so part of the oscillator correct.
does the dielectric circuit which causes
constant and changes in capacitance.
consequently its
capacitance.
hydraulic pump overrunning clutch accumulator

Piece #8 will move down Piece #10 will rotate Piece #9 will move to the
counterclockwise left

When operating Engines which are Engines with

correctly, combustion designed with precombustion
should not occur in the precombustion chambers chambers, which do not
precombustion chamber. are more likely to suffer have an increased
blocked nozzle holes, compression ratio, are
due to fuel oil impurities, not as difficult to start
 than engines designed when cold, as engines
with direct injection. with direct injection.
Check the position of the Stop the air compressor Feel each air supply line
air start valve cams. and check for pressure to see which is warm
drop throughout the from leaking air.
system.
a combination of entirely constant entirely constant volume
constant temperature pressure
and constant pressure
Fine emery cloth or steel A section of the removed A case hardened scraper
wool compression ring

reduce friction losses in seal the space between limit upward flow of lube
the engine the piston and the liner oil into the combustion
space
insufficient valve lift choking of nozzle holes return check valve
leakage

Every 4000 hours According to Every time they are

manufacturer's shutdown
instructions
storing kinetic energy maintaining equal maintaining even
exhaust pressure camshaft speed
exhaust temperature fuel injection pressure speed of the cam shaft

hydraulic pressure centrifugal force mechanical linkage

entirely constant a combination of a combination of

temperature constant volume and constant temperature
constant pressure and constant pressure

Marine Engineer Exam Questions

masked intake valves precombustion chambers intake port design

once every two once every piston stroke twice every piston stroke
crankshaft revolutions
volume of the engine relationships between relationships between
pressure and volume pressure and volume
during one stroke of the during one cycle of the
engine engine
scrape oil from the sides seal the combustion prevent any piston
of the piston space from the contact with the cylinder
crankcase liner
add oil to the housing to install inline compressed do nothing as the
the centerline of air lubricators in the bearings are sealed
component #29 supply line

As the water content in The capacitor completes All of the above are
the oil increases, so part of the oscillator correct.
does the dielectric circuit which causes
constant and changes in capacitance.
consequently its
capacitance.
high compression cracked cylinder liner fuel with a high
pressure vanadium content
increasing the changing piece #10 to a reducing the
compression on spring lighter weight counterweight pivot point
#12 friction

10:02 12:01 14:01

a restricted exhaust the fuel rack being too the fuel rack being too
manifold far in far out

Precombustion chamber Turbulence chamber Energy cell

medium-speed diesel high-speed diesel constant-speed diesel

Transmit heat from the Prevent damage to ring Dissipate combustion

piston to the cylinder groove inserts by acting chamber gas pressure
liner. as a heat dam. by channeling it through
the ring gap.
replacing the plunger highly polishing both the replacing plunger only
and the barrel plunger and barrel
The rings would tend to The ring grooves would Tendency for ring
overheat. be blocked. breakage is increased.
excessive compression excessive cylinder a light load
pressure lubrication

Marine Engineer Exam Questions

early fuel injection in one compression pressure in plugged injector holes
of the cylinders one of the cylinders
shutting off the tripping the governor shutting off the fuel
lubricating oil supply emergency stop lever supply
the piston is at top dead the valve is closed all of the above
center
The starter motor will The engine flywheel will The starter motor will
have reverse current. be burred. overspeed.
firing loads inertia loads centripetal loads

Compression stroke Exhaust stroke Pumping stroke

compression rings piston skirts oil rings

Pump barrel Tubing to the injector Cam follower

neutralize the primary reduce the shock of prevent the engine from
inertia force of the starting loads on the operating at critical
crankshaft main bearings speed
The vibration switch is The detector mechanism The detector is so
sensitive to vibration in a consists of an armature arranged to prevent
direction horizontal to its suspended on a flexure abnormal harmonic
mounting base and is pivot and restrained from frequencies from being
normally installed low on motion by a permanent developed while the
the separator where magnet acting through a separator is passing
movement is magnified. small air gap. through its critical speed
range.
a loss of lube oil the activation of the fixed all of the above
pressure CO2 system for the
emergency generator
space
reduced efficiency increased heat loss lower cylinder pressures

insufficient fuel for clogged air intake burning lubricating oil

combustion passages
The astern power of the For main propulsion Astern power available
main propelling systems without will be equal to ahead
machinery is to provide reversing gears, power when controllable
for continuous operation controllable pitch pitch propellers are
astern at 60% of the propellers or electric utilized, thus discounting
ahead rpm at rated propulsion drive, running the need for increased
speed. astern is not to lead to operating parameters.

Marine Engineer Exam Questions

It relieves the excessive It aids in the removal of It provides a low
pressure developed in combustible gases pressure point for adding
the jacket water cooler. formed in the jacket chemicals into the jacket
 water. water system.

sump or oil pan cylinder block frame

the injection pump and either the barrel or the barrel and plunger
injection nozzle must be plunger must be must be replaced as a
replaced replaced unit
slightly streaked lightly glazed highly polished
release excess pressure allow for feedwater remove sediment
treatment
fan to develop a slight vent line attached to the breather or by means of
suction not exceeding 1" upper most area of the a slight suction not
of water crankcase near the exceeding 1" of water
center of the engine
every two weeks a month a quarter

The deposits produced Eventually the growth of If continual growth is

by these growths form these organisms will permitted, a sweet odor
blockages and flow deplete the supply of similar to that associated
restrictions ultimately food available to them, with baking will be
leading to improper which in turn will cause noticed when system
atomization of the fuel their demise. components are opened
into the cylinders. for inspection.

set of regulating rings comminuting device centripetal pump

chamber cover
"19" "26" "27"

Anodized aluminum Phosphor bronze Stainless steel

After applying antisieze Once the bearing cap is Prior to installing the cap,
to the external threads, properly torqued, position the thrust shoes
torque one side at a time measure the critical in their proper locations.
to the appropriate values dimensions to ascertain
using a quality torque even tightening of the
wrench. cap.

The temperature of the Interstage leakage will There will be an increase

device will decrease. cause a decrease in of chlorides measured at
output. the distillate pump
Marine Engineer Exam Questions
must be filtered must be changed is holding finely
dispersed carbon in
suspension
the absolute pressure of the absolute pressure of the absolute pressure of
the unit will increase due the unit will increase with the unit will not be
to the increased affect of an associated increase affected, but the rate of
the air ejector. in shell temperature. condensation will be
decreased.
The pump is used to The pump provides for The pump supplies the
drain the shell when the venting of associated motive fluid to the
unit is secured, in equipment while also ejectors in addition to
addition to powering the powering the ejectors. suppling the feed water
ejectors. to the distiller.
low lube oil pressure low lube oil level cutoff high cooling water
alarm system system temperature cutout
system
dual directional valve double check valve restrictor valve

89 mm 92 mm 95 mm

Heavy phase liquid Hydraulic fluid Water

centrifugation chamber square-cut, lower major square-cut, lower minor

bottom gasket seal seal
prevent carbon allow for lube oil prevent combustion
accumulation behind the drainage behind the gases burning the ring
rings rings grooves
It allows for access into It controls the amount of The division plate
section "F". vapor produced in creates a pressure drop
section "F". between the two stages.
The lubricating quality of The oil is functioning Normal engine operating
the oil has dangerously normally. temperatures have been
deteriorated. exceeded.
bowl assembly hood regulating ring kinetic converter

in the middle third of the in the lower third of the not apparent, because
glass glass the water level is kept
below the range of the
glass
10-15% 20% 25-30%

It heats the jacket water It causes the jacket water It condenses the
entering the device. to evaporate. distillate.
 Marine Engineer Exam Questions
For a constant operating The specific gravity of With oils of greater
temperature, the greater the oil and the size of the specific viscosities it is
the specific gravity of the regulating ring are proper to select smaller
oil the larger the related only during the regulating rings
regulating ring. initial design stages of regardless of the
the centrifuge. operating temperatures
desired.
disc stack base lower main disc distributor

Non-condensable vapors The sea water flowing The jacket water flowing
are removed and water through device "I" is through device "I" is
vapors are preheated. cooled. heated.

Use of bimetallic piston Ring gap pretensioning Thermal increase in ring-

rings end clearance

keep the parts immersed always keep the plunger work over a linoleum-
in diesel fuel and barrel together type surface
oil foaming will occur large quantities of oil are lube oil viscosity is
consumed always decreased
distillate pump suction brine eductor suction brine eductor inlet

minimal while the sliding equal to the always greater than the
piston is in the sludge displacement volume of volume of liquid present
discharge position the sliding position when the unit is
operating
Once a week for two Once a week for four Once a month for two
hours hours hours

Jacket water is admitted The feed water enters The feed water is heated
into the boiling chamber. the device and vaporizes prior to being pumped
while exposed to a into section "F".
vacuum.
0.872 kg/dm3 0.882 kg/dm3 0.892 kg/dm3

Valves "H", "J", "K", "L", Valves "J", "K", "L", "M" Valves "D", "H", "J", "K",
"M" open, valve "D" open, valves "D" and "H" "L", "M" open, valves "I",
closed. closed. "G", "F", and "E" closed.
salt water inlet feed water inlet jacket water inlet
oil pressure acting compression pressure ring expansion from the
behind the ring acting beneath the ring heat of combustion

increase ignition delay affect fuel oil metering affect engine

performance at low
speed only
pitting sludge hard varnish

Marine Engineer Exam Questions

against the crosshead against the crosshead away from the crosshead
during the compression during the power and during the power and
stroke and away from the compression strokes compression strokes
crosshead during the
power stroke
.915 kg/dm3 .920 kg/dm3 .925 kg/dm3

be arranged to prevent have adequate insulation not penetrate the engine

entry of boarding seas in any berthing space room casing
brine pump discharge condensate pump ejector supply pump
discharge discharge
allow for removal of prevent backflow of remove condensable
produced distillate eductor discharge gases from the unit

K S X

The sea water exits the The sea water used for Main engine jacket water
device. condensing enters the is admitted to the unit.
device.
The top and bottom rings The top compression Top compression ring
pictured are bimetal ring is protected from has an inside bevel.
rings. overheating by a ring
dam.
ignition delay high torsional shock to improper pump-to-engine
fuel lines timing
The viscosity increases. Engine oil consumption Lubricating qualities of
decreases. the oil are enhanced.
104 mm 110 mm 117 mm
 control the amount of control the amount of provide a positive suction
brine exiting the feed water entering the head for the brine pump
evaporator evaporator
water-have adequate insulation terminate above the not penetrate the engine
in any berthing space deepest load waterline room casing
The motive power is the The motive power is the The motive power is the
feed water supply. brine pump output, prior jacket water flowing
to being discharged through the ejectors.
overboard.
Increased main bearing Severe injury to engine All of the above.
wear. room personnel.

2 3 4

Marine Engineer Exam Questions

It supplies the operating It supplies the operating It supplies the operating
medium used in the medium used in the medium used in the
removal of the distillate. removal of the brine. removal of air and non-
condensable gases.
allow the combustion prevent buckling and aid in protecting the oil
gases to get behind the breaking of the ring film
ring and press it against
the cylinder liner
Fuel injection will remain Fuel injection will occur Fuel injection will occur
unchanged. earlier. later.
Too much piston ring High lube oil viscosity Low lube oil temperature
wear
The blocking device All speed signals The device is used to
prevents direct hydraulic emanating from the interrupt the pneumatic
flow from operating the throttle lever are signal to port "A" of the
reversing mechanism. diminished by half due to distributor shown in
the blocking effect of this illustration MO-0053.
valve.
directly connected to the directly connected to the attached to the outlet of
feed water supply line jacket water supply line the air ejector
2100 to 2200 RPM 2200 to 2300 RPM 2300 to 2400 RPM

improper operation of the neglecting to close the neglecting to latch the

distillate pump vent shell dump valve
opening the drain valve the continuous action of orifice "19" regulating the
located to the left of ejector "22" amount of feed water
orifice "19" entering the distiller,
thereby preventing
excess brine
accumulation
Worm and worm gear Pneumatic three position Limit switches
valve
Sea water from the Jacket water from the Sea water from the
evaporator tube bundle. condenser plate evaporator plate
assembly. assembly.
B C D

Fuel will leak into the Effective length of stroke Effective length of stroke
return line. will be increased. will be decreased.

plugged oil wiper rings low lube oil temperature low lube oil pressure

hydraulic actuated, muli- infinitely positioned detented, control air

position control unit pneumatic control pressure, reducing and
filtering unit

Marine Engineer Exam Questions

Sea water from the Evaporator feed water This is not an inlet; jacket
service system water exits from this
flange.
Inlet annular Inlet nozzle Discharge port

The lock ring forces the When tightened, the lock The lock ring insures
disc stack onto the ring allows for movement proper positioning of the
spindle, providing a of the sliding piston and disc stack and maintains
positive means of positions the sliding a positive contact of the
rotation and locating the piston within the bowl bowl top and bowl
bowl top to seal the bottom. bottom.
separation chamber.
upper flash chamber feed water return labeled second effect tube
labeled "F" "K" bundle

The device is a relief Constant pressure is The regulator, or

valve with feedback to maintained at device "B" pressure reducer, drops
prevent excessive while device "C" is used the supply pressure to
pressure from damaging only to modify the output the desired operating
system components. signal. level.
relief valve pressure reducer sequencing valve

increase valve operating obtain greater valve lift create longer valve
lash duration
air bubbles will form in effective length of stroke effective length of stroke
the fuel return line will be increased will be decreased
Excessive piston ring Excessively high lube oil Excessively low lube oil
wear viscosity temperatures
The jacket water cooler The device specifically The cooler removes
is used to raise the serves to remove the sensible heat from the
temperature of the sea latent heat of jacket water.
water flowing through it. vaporization from the
jacket water.
avoid fracturing the use a specific pattern avoid using a torque
backing plate while measuring the wrench that has not been
distance to which the recently calibrated
plates have been
compressed
low lube oil pressure high exhaust high cooling water
temperature pressure
Jacket water would be The unit would The absolute pressure of
automatically by-passed automatically shut down the unit would increase,
around the distiller. due to the closing of the causing a decrease in
low pressure contacts. output quantity and
purity.
The jacket water cooler The output of pump "7" The amount of vapor
will be overloaded, will increase with a being formed in the
eventually causing a corresponding increase evaporator will
critical engine alarm. in pressure. decrease.

Marine Engineer Exam Questions

4 5 6

Steel ruler or tape Cantilever wrench Pneumatic impact

measure wrench
compression of the valve clearance between the out of roundness of the
springs valve seat inserts and fuel injection cams
the head
operating water reservoir channelling chamber injection chamber
The temperature of the The pressure of the sea The pressure of the lube
lube oil entering the water to the lube oil oil at the cooler will be
cooler will increase cooler will be increased increased above
above normal setpoint of above the operating normally accepted limits.
the temperature pressure of the system
controller. without the distiller on
line.
The water seal will be The oil/water interface The unit will not properly
lost. will remain in the same operate and should
neutral position. automatically shut down.

The feed water flowing The heat being The heat of combustion
through the inside of the transferred is subliminal, from the engine is being
tubes is being heated by therefore expansion is transferred asiotropically,
the jacket water on the taking place within the adding latent heat to the
outside of the tubes. tubes. entering feed water.

Improper venting during Failure to properly Failure to properly

operation. tighten the bolts of the tighten the bolts of the
evaporator heat condenser heat
exchanger. exchanger.
Steam clean the Remove only the disc Disassemble the entire
components in place, stack, separate all the unit, clean all
check for proper discs, clean with steel components, replace any
alignment, using the wool and solvent, defective gaskets and
match marks provided, replace the disc stack use the proper lubricants
reassemble and restart ensuring it is located by where required.
the unit. use of the dowel pin
shown.
During its contact period From having passed While it is in contact with
with heat exchanger "3". through "23". device "24".
The output of this device The output shown is The pneumatic
is used to secure the used to prevent torpid arrangement serves to
engine if it becomes speed changes resulting prevent the engine from
overloaded. from fluctuations of the operating within a critical
input signal. speed range.

Marine Engineer Exam Questions

Operating water will be The unit will not start due The bowl will fail to close
supplied through port to pressure/time delay when starting and the
"S". relays. unit will not shoot when
operating.
Block Base Sump
a faulty interplate improper tightening of improper tightening of
condenser gaskets the condenser the evaporator

increased lube oil low lube oil temperatures high firing pressures
consumption
The flow to the Both the flow to the The sea water pump "H"
condenser will not be condenser and the will always supply
affected due to the distiller output will be sufficient quantities of
operation of the pressure reduced. water.
control valve "H".
the centrifuge disc stack the sole direction of the relative size of the
heavy phase flow separation zone
The standby pump #7 Cooling water will be The main engine will
will automatically be supplied by pump #20 overheat unless slowed
placed into operation for through valve "M". or secured until an
emergency cooling. alternate means of
cooling water flow can be
provided.
The unit will flood, The unit will flood, Transducer "18" will
vacuum will decrease, vacuum will decrease sense excess pressure
the shell temperature and the equalizing holes causing an automatic
will modulate, depending located in the tube sheet shut down of pump "20".
upon the sea of "24" will prevent over
temperature and the pressurization.
relief valve "26" will lift.
At the inlet cone labeled In the opening chamber At the inlet orifice labeled
"O". labeled "L". "S".
The three position valve This unit controls the air The unit shown is used
prevents the fuel flow operated turning motor to prevent starting of the
reaching the fuel exhaust when the unit is main engine when the
injection pumps. in operation. turning gear is engaged.

The lash adjuster The ball check is always The bridge spring applies
maintains zero lash open when the exhaust the required force to
between the end of the valve is seated. maintain contact
valve stem and the valve between the plunger and
plunger. the exhaust valve.

Marine Engineer Exam Questions

cancel the effects of regulate flow from the direct the flow from the
improper regulation drain pump distillate pump
developed by device
"11"
excessive ring action excessive cylinder improper ring rotation
lubrication
lower paring device upper paring gasket pump lock

"27" "25" "21"

The liquid enters the The liquid enters via port The liquid remains
opening space with the "X", travels through the trapped in space "J",
net resultant force closing chamber, and developing an upward
causing the piston slide exits port "S", force to open the bowl.
to move down. maintaining an upward
force against the bowl
bottom,
bowl bottom operating slide sliding piston

paring chamber closing chamber sealing chamber

The solenoid valve is The solenoid valve is The solenoid valve is

closed and the bypass open and the bypass open and the bypass
valve is closed. valve is closed. valve is open.
0.42 bar 0.85 bar 2.05 bar

Insures proper pressure Eliminates need to Provides far easier

in a hydraulic system. remove valve springs. removal of the valve
cage.

Lubricating Cooling Ignition

excessive valve lash excessive lube oil lower than normal fuel
consumption consumption
The latent heat of The volume will increase The volume is greatly
condensation is removed if the valve labeled "J" is reduced, contributing to
causing the volume to opened excessively, condensation within the
increase. resulting in an increase condenser.
of the distiller absolute
pressure.
inlet directional guide spindle nut impeller locking device
Marine Engineer Exam Questions
lever operated, infinite manually operated, pneumatically operated,
position, four-way valve detented, four position, infinite position, reducing
four-way valve valve
"J" and "K", "G" and "H" "G" and "H", "E" and "F" "A" and "C", "L" and "M"

"N" "P" "R"

parting chamber upper sliding piston opening chamber

chamber
The jacket water pump The jacket water pump The jacket water pump
supplies the distiller with will have no affect on the circulates water
sea water feed while also operation of the distiller. throughout the engine
powering the ejectors. cooling and distiller
heating systems.
keep the valves off their close the valves open inlet valves when
seats until the exhaust the air injection cycle
stroke is completed begins
a dribble in the fuel insufficient leakoff a malfunctioning injection
injection nozzle through injection nozzle nozzle
packing
Dirty lube oil strainer Low lube oil pressure High lube oil temperature

non-condensable gases brine and non- brine and jacket water

from two separate condensable gases from the condenser
sections of the distiller
Bowl retention cycle Clarification cycle Sludge discharge cycle

An increase in distiller A slow continuous rise in The activation of the

output resulting from the the lube oil cooler outlet salinity monitoring
combination of jacket temperature indicated at equipment's annunciator
water and the distillate device "4". circuit.
produced.
thermal venting devices single wire controls electrical conduits and
circuitry
top cover hub

A gradual rise of the The output signal from The output from "2" is
input signal to "1" will "2" will be equal to the equal to the input to "1"
cause a multiple setpoint of "17A" only until the input to "1"
stepped output from "2" when the input is less exceeds the setpoint of
proportional to the input than the setpoint of "17B", causing "22A" to
signal. "17B", permitting the shift and permits an
transition signal to output signal equal to the
become modulated. input.
Marine Engineer Exam Questions
Seventy-five percent of Twenty-five percent of The amount of feed
the feed water entering the feed water entering water entering the
the unit is removed as the device is removed as distiller is dependent
brine. brine. upon the condition of
device "19", while the
amount of brine leaving
is dependent upon the
condition of device "21".
spring force combustion pressure exhaust pressure

Increase fuel preheat Decrease load limit on Increase injector cooling

temperature. the governor. water temperature.

Lube oil level decreases Lube oil contaminated Lube oil level increases
with fresh water coolant

indicate a pressure on indicate a pressure on improve to a steady state

"67A" equal to the "67A" equal to the input when moisture is
setpoint of "17A" of "17A" removed from the system
The solenoid valve The solenoid valve The solenoid valve
closes, reduces the closes, allows the water closes, allows the weight
water pressure to the in the opening chamber of the sliding piston to
paring chamber, and to bleed off through "S", oppose the low water
allows the spring force to and the sliding piston pressure, and moves it
move the sliding piston moves upward due to the along the axis of the
upward. force developed in area spindle.
"J".
the angular velocity at the speed of the bowl inertia forces during
which the liquid travels and the condition of seal starting and stopping
"U"
guide pin locating dowel pin bowl gasket

6,698 kW 7,455 kW 8,982 kW

reduce engine load check thermostatic valve clean sea water strainer

to be made between the to be provided with to be provided with

the bilge keel and the shutoff or isolation valves expansion tanks, which
keel except when installed must be located below
forward of the collision the load line to provide
bulkhead positive cooling water
flow
permit the use of alloy reduce heat transfer from facilitate valve removal
valve seat materials the valve seat for servicing

Marine Engineer Exam Questions

Pull No. 7 cylinder piston Examine the governor Check the intake
and examine the rings. linkage for binding. manifold pressure for
evidence of burned
intake valves.

9.6 gallons (36.34 L) 11.4 gallons (43.15 L) 14.4 gallons (54.51 L)

fire-tubes and stay-tubes external boiler plating separate crown sheets

air when air cleaners are condensation of water breakdown of the

not used vapors lubricating oil by dilution
II only is correct both I and II are correct neither I or II are correct

expansion tank outlet cooling water heat engine jacket water

exchanger outlet outlet

provide the greatest prevent pump clogging prevent cavitation at the

pump efficiency from marine growth pump outlet

27.5 kg/cm2 34.5 kg/cm2 36.0 kg/cm2

low compression solenoid stuck open fuel tank too full

hydraulic governor valve lash cooling system

oil in the air charge water in the fuel injection continuing after
the fuel charge is ignited
valve guides valve seals all of the above
the potential retraction the mechanical centripital force exerted
energy possessed by the interaction between the by the rotating armature
return spring "D" clutch and the splined
sleeve
II only both I and II neither I nor II
II only both I and II neither I nor II

1,242 kW 1,116 kW 926 kW

Marine Engineer Exam Questions

the higher peripheral the potential energy of mechanical interaction of
speed of the flywheel spring "D" once the the left hand thread and
solenoid has been de- the energy imparted by
energized the rotation of the over-
running clutch
wet liner type type integrally machined integral wet liner type
in the block
water or moisture fuel dilution carbon suspension
contamination
valve springs air pressure a rocker arm not shown

develop less power have high firing lift its cylinder relief
under load pressures valves

excessive valve-guide high lube oil viscosity low lube oil temperature
clearance
Pyrometer responses will Indicated cylinder Indicated firing pressure
be retarded. temperature readings will readings will increase.
increase.
0.90 cubic meters (900 2.7 cubic meters (2700 5.4 cubic meters (5400
L) L) L)

battery powered, electric air driven starter motor air driven DC generator
motor driven vane type, assembly
hydraulic pump
Beginning with number 1 Beginning with number Beginning with number
and moving counter 1, tighten it move directly 1, tighten it, move to
clockwise, tighten each opposite and tighten, number 3 and tighten,
in consecutive order then move 90° tighten then to number 7, then to
and continue on number 5 and continue
on
fuel pump timing marks fuel rack alignment a strobascopic speed
marks scale for timing
a speed not equal to that the same speed of the the same speed of the
of the camshaft crankshaft device labeled "D"
55% 79% 83%

minimum firing pressure cam contour length of the spring

advanced fuel ignition increased fuel economy reduced engine power

exhaust temperatures cooling water lube oil consumption

temperatures
forced draft turbocharging aspiration

Marine Engineer Exam Questions

As sludge and dirt One turn of the T-handle
accumulate on the outer is sufficient for cleaning
surface of the strainer the discs.
discs, the effectiveness
of the strainer increases.

I only II only

I only II only

I only II only

I only II only
II.

1,959 kW 3,906 kW

a dry liner a wet liner

fuel knock increased power

 Worn intake valve guides Pitted precombustion
chambers
I II

A B

maintain cold lash provide metered

adjustment bypassing of lube oil in a
bypass type lube oil
system
IHP BMEP
114.95 RPM 817.39 RPM

angularity of the piston inertia moment from the

motion piston
I only II only

1,348 kW 2,696 kW

Marine Engineer Exam Questions

fuel consumption will be all the fuel will be burned fuel consumption will be
low at top dead center high
change the lube oil more maintain a higher air-box maintain a higher air-box
frequently than normal temperature than normal pressure than normal

Uniflow Crossflow Direct flow

II only both I and II neither I nor II

II only both I and II neither I nor II

199.11 RPM 512.20 RPM 145.69 RPM

B C D
Fine emery cloth or steel A section of the removed A case hardened scraper
wool compression ring
non-ductile cast iron lead and cast iron alloys zinc and antimony alloys

wet liner jacket liner corrugated liner

low exhaust temperature mechanical knock in fuel knock in each

each cylinder cylinder
metallic oxides corrosive acids any or all of the above

turbocharger fuel atomizer fuel injector

Piston rod Turbocharger Lubrication telescopes

steam is recirculated unevaporated feedwater steam demand response

through heating coils in is discharged through the is slow
the boiler skim tube
II only either I or II neither I nor II

II only both I and II neither I nor II

feeler gage and straight adjustable trammel sighting device

edge

Marine Engineer Exam Questions

a speed not equal to that the same speed of the the same speed of the
of the camshaft device labeled "T" device labeled "N"
Wet liner Jacket liner Wet jacket liner

fuel will not be properly maximum expansion of compression pressure

atomized in the cylinder the burned fuel cannot will be too low to cause
take place in the cylinder fuel ignition
causes excessive can only be detected by decreases fuel
crankcase pressure a compression check consumption
super-aspirating air injection supercharging

II only both I and II neither I nor II

4644 kW 7296 kW 9290 kW

abnormal lube oil low lube oil temperatures high firing pressures
consumption
112.50 RPM 100.00 RPM 800.00 RPM

Fuel oil Sediment Water

to be constructed as permitted to be part of to be provided with

independent heat the vessel's hull as long expansion tanks, which
exchangers as the material is of the must be located below
same quality and the load line to provide
thickness as the hull positive cooling water
flow
Wet Ported jacket Caston jacket

lower than normal higher than normal higher than normal

cylinder pressure and cylinder pressure and cylinder pressure and
high exhaust low exhaust temperature high exhaust
temperature temperature
inadequate air filtration excessive ring and liner excessive cooling of
wear lubricating oil
power the turbocharger reduce the cylinder cool the turbocharger
scavenge effect
Engine "B" will operate at Engine "B" will take Engine "B" will operate at
a lower RPM than engine lesser part of the load a higher RPM than
"A" when operating than Engine "A". engine "A".
alone.
Propeller Reciprocating Rotary

Marine Engineer Exam Questions

75.00 RPM 163.64 RPM 100.00 RPM

I only II only either I or II

sea water temperature jacket water pressure jacket water temperature

must never be warmer should always be greater must always be less than
than 40°F than the sea water 60°F
pressure
dry liner wet liner integral-jacket liner

high exhaust low exhaust temperature fuel knock in each

temperature cylinder
air filtration is inadequate engine coolant is leaking fuel oil is leaking into the
into the lube oil lube oil
Increased turbulence Increased mechanical Increased brake mean
efficiency effective pressure
1.00 mm 0.30 mm 0.46 mm

cavitation erosion in the excess corrosion dirty jacket water cooler

water jackets inhibitor in the coolant

roaches and other air, solids, or liquids other non-hydrocarbon

insects fuels
9.0 kg/cm 10.0 kg/cm 12.5 kg/cm

determine the need for measure any change in prevent damage to the
filter changing oil viscosity filter
a rocker arm and push cam action fuel oil pressure
rod
the pump supply the slope of the fuel cam how the plunger is
pressure rotated

low exhaust temperature low firing pressure fuel knock in each

cylinder
oil foaming will always large quantities of oil are lube oil viscosity is
occur consumed always decreased
a cylinder air charge of increased pumping less valve overlap
higher pressure losses
806.25 RPM 89.58 RPM 618.75 RPM

a spray of fuel into a fuel sprayed into an fuel injection provided by

turbulence combustion energy cell a unit injector

Marine Engineer Exam Questions

the entire pump must be the injection pump and either the barrel or
replaced injection nozzle must be plunger must be
 replaced replaced
Advanced ignition Clogged air intake Leaky exhaust valve

2.8 m/sec 4.5 m/sec 5.7 m/sec

large, direct drive diesel diesel engines designed medium-speed, four-

engines to burn residual fuels stroke/cycle diesel
engines
swept volume of the inside diameter of the piston displacement in
cylinder cylinder the cylinder
low exhaust temperature low exhaust pressure mechanical knock in
each cylinder
decrease in clearance increase in air leakage decrease in air leakage
between the mating past the rotors past the rotors
lobes
Prelube cylinders with Open all air space drain Open all indicator valves.
hand cranks. cocks.
governor flyweight action governor flyweight positioning a butterfly
on a pilot valve which motion acting on fuel valve in the fuel delivery
controls fuel injection controls through suitable system
linkage
Engine "A" will take a Engine "B" will operate at Engine "A" will take
greater part of the load a lower RPM than engine lesser part of the load
than engine "B". "A" when operating than Engine "B".
alone.
533.33 RPM 112.50 RPM 711.11 RPM

148.57 RPM 522.32 RPM 401.79 RPM

104.41 RPM 758.68 RPM 1003.42 RPM

131.25 RPM 711.11 RPM 100.00 RPM

increase cylinder prevent wear of the liner prevent wear of the liner
turbulence from occurring from forming a ridge at
the upper level of ring
travel
low firing pressure low exhaust temperature mechanical knock in
each cylinder
diluted with fuel oil diluted with water contaminated with
carbon
Marine Engineer Exam Questions
engine horsepower lube oil system pressure specific fuel consumption

200 psig 250 psig 300 psig

64.52 RPM 83.25 RPM 620.00 RPM

142.22 RPM 266.67 RPM 394.74 RPM

529.27 RPM 104.64 RPM 55.07 RPM

Beginning with number 1 Beginning with number Beginning with number

and moving counter 1, tighten it move directly 1, tighten it, move to
clockwise, tighten each opposit and tighten, then number 3 and tighten,
in consecutive order move 90° tighten and then to number 7, then to
continue on number 5 and continue
on
hunt until stabilized by decrease to a slightly remain the same until
the droop rod lower value manually changed
II only both I and II neither I or II

combustion knock under poor fuel combustion all of the above

load
Sulfuric acid is formed. Bearings become pitted Valve stems develop
and immediately fail. sludge deposits.
Lube oil system pressure Brake specific fuel Mechanical efficiency
increases. consumption increases. increases.
provide the engine with a change the engines eliminate the need for
braking device direction of rotation mechanical interlocks
B C D

placed on top of the farthest from the cylinder nearest to the cylinder
engine along its head head
centerline
increase as the load decrease as the load remain unchanged as
increases increases the load decreases
a speed not equal to that the same speed of the the same speed of the
of the camshaft device labeled "N" device labeled "B"
inertia moment from the centerline of the cylinder centerline of the king pin
piston
Marine Engineer Exam Questions
The chromium Chromium eliminates the Pores in the plating aid in
strengthens the liners in need for oil scraper maintaining the lube oil
the way of the rings. film.
scavenging air ports.
more power output lower fuel pressure less power output

Turbine bearing Spring bearing Diesel engine main

bearing
cool the exhaust valves reduce the intake air increase the temperature
charge density of exhaust gases
II only both I and II neither I nor II

a faulty reverse power unsynchronized a different speed setting

relay within the main isochronous load on each unit
circuit breaker assembly distribution adjustments

forcing the products of collecting the air charge combustion and

combustion out of the at the air cleaner expansion of hot gas
cylinder with the fresh air
charge

remove water ensure a positive flow of ensure that all lube oil
contamination oil at all times has been treated twice

The feed water acquires The jacket water absorbs The feed water gains
heat passing through heat in the evaporator heat in section "23",
devices "2" and "23". section, while giving up while the vapor gives up
its heat in the distiller heat in section "24".
section.
inserting shims between replacing the complete rotating the crankpin
the crankpin bearing box bearing set bearing until the proper
and the connecting rod end clearance is
foot obtained
angled honing cross hatch honing doubled honing

detonation throughout preignition throughout excessive smoking when

the load range the load range the engine is under load
viscosity-dilution chart precipitation number modified neutrality chart
indicator
supplies oxygen for cools the valves and all of the above
combustion cylinder walls
B C D

Marine Engineer Exam Questions

The valve will reseat The valve gear will not The valve will reseat
abruptly. bounce. gradually.
buttons on the thrust pivots on the thrust collar screw dowels in the base
shoes ring
overheating, due to varying the water level carrying excessive
waterside deposits above the crown sheet alkalinity in the boiler
water
greater fuel economy lower horsepower lower compression ratio

volumetric efficiency turbulence of the air fuel efficiency

change

excessive lubrication of improper spreading of breaking of the top ring,

the top ring lubrication on the ring land, or both
cylinder wall

overload of that smoky exhaust cooling water

particular cylinder temperature rise
Fuel oil Sediment Water

provide more air for increase the no-load provide more fuel for
combining with the fuel RPMs combining with the air
70.31 RPM 444.44 RPM 62.50 RPM

the lower part of the ring the middle of the ring belt each ring groove of the
belt ring belt
admit starting air to the provide lubrication of provide adapter to obtain
cylinder cylinder combustion pressure
readings
stop fuel delivery to the advance fuel pump increase the fuel pump
injector timing delivery pressure
cam follower is located spill valve opens safety shut down valve
on the base circle opens
"F" "H" "J"
shorten the ring break-in prevent cylinder liner appear slick and glazed
period glazing
Quantity of fuel injected Start of injection tends to Duration of injection will
will always be increased. be advanced. always be greater.

Lower than normal Delayed fuel injection All of the above are
compression correct.
hunt until stablized by decrease to a slightly remain the same until
droop rod lower value manually changed

Marine Engineer Exam Questions

comparator type mist exhaust gas vapor Ringleman exhaust gas
detector condenser analyser
comparator type mist exhaust gas vapor Ringleman exhaust gas
detector condenser analyser
rotary type mist detector photo-electric type mist Ringleman type smoke
to be used for high detector used in high detector as designed for
speed, four stroke diesel speed, two-stroke, trunk large low speed engines
engines piston engines
photo-electric cell theory variation of specific venturi effect (square
volume of a vapor root of vapor velocity)
rotation of part #433 valve action of part #436 pressure applied to
component #511
90° 90°-120° 130°-160°

scavenge air pressure lube oil pressure cooling water pressure

The fuel metering will The fuel will explode. The cylinder head will
vary. crack.
an increased flash point higher lube oil pressures an increased viscosity

Positive displacement Roots-type rotary blower Gear-driven centrifugal

blower blower
meter the amount of oil adjust the timing of the indicate the quantity of
flow to the cylinder cylinder lubricating oil to oil flow to the cylinder
lubricating quill the cylinder
excessive piston to liner excessive dirt beneath faulty nozzle spray
clearance the piston crown that
reduces heat transfer.
K 3

during the valve overlap with only the exhaust at a pressure below
period valve open atmospheric
the amount of lube oil piston speeds increase injection pressures
additives increase decrease
339.29 RPM 96.51 RPM 267.86 RPM

neoprene O-ring soft copper gasket precision ground flange

joint
early injection timing worn orifices in the worn or scored cylinder
injection nozzles liners
the water produced the sulfur in the fuel unburned fuel oil
during combustion

Marine Engineer Exam Questions

Engine shaft, thrust Propeller shaft, thrust Propeller shaft, thrust
shoes, thrust collar, and shoes, thrust bearing collar, thrust shoes, and
thrust bearing housing housing, and thrust collar thrust bearing housing

photo-electric, explosive comparator type mist level type explosimeter,

gas indicator, for use in detectors for large low for small medium speed,
high speed, two-stroke, speed, cross head trunk piston type engines
trunck type piston engines
engines
66.67 RPM 460.47 RPM 114.29 RPM

110.11 RPM 510.64 RPM 71.81 RPM

652.63 RPM 505.79 RPM 52.63 RPM

412.50 RPM 550.00 RPM 45.83 RPM

provide the greatest prevent pump clogging prevent cavitation at the

pump efficiency from marine growth pump outlet
Externally finned liner. Wet liner. Integral water-jacket
liner.
incorrectly adjusted incorrectly adjusted fuel incorrectly adjusted
intake valve timing injector intake valve clearance
Fuel oil discharging from Lube oil discharging from A change in the lube oil
the waste water outlet of the waste water outlet of viscosity.
the lube oil purifier. the lube oil purifier.
Constant pressure Pulse pressure Radial flow

II only both I and II neither I nor II

meter fuel oil to the admit the correct amount actuate exhaust valves in
injectors of starting air to the the correct sequence
cylinders in proper order
supply lubricating oil for exhaust gas and vapors deliver cooling water to
actuating the exhaust from the power cylinder the exhaust valve
valve actuating device
spring pressure scavenging air pressure hydraulic pressure

oil leak into the dribbling injector low fuel viscosity

turbocharger
resist emulsification neutralize acids resist oxidation at high
temperatures

Marine Engineer Exam Questions

loss of engine power burned intake valves engine racing
Nozzle operation will be Fuel will leak into the Fuel will not be delivered
unaffected drain line
blotter test stability test spectrographic test

Pulse pressure Constant velocity Axial flow

soft copper gasket precision ground flange flexible metallic seal ring
joint

the potential retraction the mechanical centripital force exerted

energy possessed by the interaction between the by the rotating armature
return spring "D" clutch and the splined
sleeve
rotating of the starting the high rotating speed applying accumulator
cam of the flywheel pressure
piston rods connecting rods piston guides
fuel pressure delivery cylinder lubricating safety shut down system
system system
unscrewing and unscrewing and inspection can not be
removing item #6 from removing item #4 done without first
the cylinder draining the jacket
cooling water
honing makes it easier to water seals are not it fits more loosely due to
maintain the desired oil required a decrease in heat
film transfer through the
composite wall
no fuel will be delivered the nozzle will overheat injection lag will be
through the nozzle increased
Octane number is Pump speed is Blowers' speed is
altered. decreased. decreased.
exhaust gas temperature speed load

"F" "H" "J"

Outside micrometer Strain gage Gage block

Outside micrometer Strain gage Gage block
greater heat transfer rate greater wear resistance procedure to replace dry
than wet liners than wet liners liners is simpler than for
wet liners
II only both I and II neither I nor II

greatly fluctuating inlet constant exhaust multiple exhaust pipes to

manifold pressure manifold pressure the turbocharger

Marine Engineer Exam Questions

I only II only both I and II

C D E

lube oil pump fuel oil pump jacket water pump

lube oil pressure to the lube oil strainer magnets bearing lube oil
bearing temperature
remain the same until decrease to a slightly hunt until stabilized by
mannually changed lower value the droop rod
remain the same until the decrease to a slightly hunt until stablized by
over speed trip actuated lower value droop rod

it is fitted with neoprene the honing process there is less likelihood of

O-ring seals makes it easier to water leaking into the
maintain the desired oil combustion space
film
employing fuel oil as a preventing hard carbon avoiding fuel oil
cooling medium deposit on nozzle tips temperature exceeding
builder's specification
entering the lube oil entering the cylinder entering the water jacket

Reaction Pulse Constant Pressure

I only II only both I and II

pyrometer calorimeter dynamometer

tachometer calorimeter pedometer

tachometer pyrometer dynamometer

dynamometer calorimeter pedometer

prevent flame direct the force draft into protect the inner casing
impingement on the the space between the and reduce heat loss
generating tube bank inner and outer casings,

Marine Engineer Exam Questions

Oil is prevented from The illustrated engine Valve clearance is
leaking out of the valve utilizes a dry type adjusted at point #1.
cover by a metal to metal cylinder liner.
fit.
overheating of the nozzle cracked pump housings dirt in the fuel
orifices
To check for a tight To ensure that the valve To check the valve
bonnet seal. will not be seized shut packing.
when hot.
Roots blower Piston type blower Vane type blower

200 psig 250 psig 300 psig

close all manually lock all safety interlock block all control system
operated fuel valves switches closed relays closed
overheating because of chipped reduction gear excessive wear on the
slipping shoes teeth thrust bearings

One engine must be Full reversing torque is Mechanical reduction

running ahead and the not available. gearing is required.
other astern.

actuated by boiler safety burner is properly seated starting trial for ignition
trip occurs

starting trial for ignition burner is properly seated actuated by boiler safety
occurs trip

remove moisture inject fuel oil into the warn of excess

accumulation from the cylinder combustion pressure in
cylinder prior to starting the cylinder
smoking due to high exhaust all of the above
unburned fuel temperature readings
increasing lube oil flow dilution by fuel oil adding SAE 70 oil

At full load the intake At full load the intake At full load the intake
manifold pressure and manifold pressure is less manifold pressure is
exhaust manifold than the exhaust greater than the exhaust
pressure are equal. manifold pressure. manifold pressure.
upper flash chamber feed water return labeled second effect tube
labeled "F" "K" bundle

temperature limiting pressure relief valve set automatic reset pressure

device set at 212° F at the MAWP limiter

Marine Engineer Exam Questions

II Both I and II Neither I or II
II Both I and II Neither I or II

II Both I and II Neither I or II

connect the pressure pressure test cylinder connect the exhaust gas
indicator heads pyrometers
fuel leakage into the fuel leakage before and insufficient fuel delivery
nozzle drain line after injection through that nozzle
carbon deposits in the excessive centrifuging excessive fuel dilution
lube oil
less than the average greater at the turbine greater at reduced
exhaust manifold wheel than at the engine speed
pressure impeller
The engine is equipped A gastight seal is The engine cylinder head
with a dry liner. provided by a gasket is fitted with replaceable
between the cylinder valve seats.
head and cylinder liner.
improved atomization greater fuel economy incomplete combustion

constantly increasing as approximately equal to approximately equal to

the amount of exhaust manifold atmospheric pressure at
supercharging increases pressure at all times all times
connect exhaust gas pressure test cylinder remove moisture
analyzers to determine heads to check for leaks accumulations from
engine efficiency cylinders prior to starting
contaminated fuel kinked fuel lines excessive engine
vibration
Leaking standby oil Excessive lube oil Excessive lube oil in the
cooler core pressure system
By the action of an By the pumping action of All of the above.
auxiliary electric blower the piston.
at low load.
stud diameter head nut diameter stud material

Air in the fuel system Coated fuel lines Excessive vibration

lube oil pump failure lube oil cooler failure lube oil sump overflow

Compressor Aftercooler Exhaust diffuser

Marine Engineer Exam Questions
II only either I or II neither I nor II

II only either I or II neither I nor II

cylinder head valve cover engine frame

lengthy exhaust valve extended operation at excessively early

duration light load injection timing
Increased oil operating Sticking piston rings. All of the above
temperatures.
Increase the exhaust Decrease the lube oil Increase the air density
temperature temperature
sealing compound lubricating oil gaskets

increase in engine load plugged injector spray increased plunger stroke

hole
excessive bearing end plugged oil control rings engine overload
play
decrease turbocharger reduce exhaust gas compensate for
power usage temperature turbocharger RPM
fluctuations
II only either I or II neither I nor II

Critical speed. Maximum speed. Design maximum speed.

cool the bearing surfaces assist in sealing bearing all of the above
surfaces
lower torque but higher higher torque and higher lower torque and lower
brake horsepower brake horsepower brake horsepower
harmonic balancers a detuner flywheel flexible engine
mountings
Lengthy opening of the Excessively early Extended light load
exhaust valve. injection timing. operation.
improve fuel penetration form a friction reducing lubricate the fuel
in the combustion space film between mating injectors
surfaces
prevent turbocharger eliminate the need for a remove moisture from air
overheating precooler compressed by the
turbocharger
Torsional vibration Friction clutch Air bladder clutch
damper

smoky exhaust early detonation and a high exhaust

loss of power temperatures
preheating the air intake aftercooling the intake air preheating light fuels
Marine Engineer Exam Questions
detuner or viscous fluid lightened crankshaft spherically seated
damper flywheel crankshaft bearing

above normal with a below normal with a below normal with an

normal exhaust normal exhaust above normal exhaust
temperature temperature temperature
cooling of the pistons for removal of dirt or all of the above
and bearings metal particles resulting
from wear
increase the pressure of increase the density of reduce the blower
the inlet air the inlet air operating temperature
combustion at opening of exhaust start of fuel injection
approximately constant valves
pressure
fuel economy is not exhaust gas temperature the exhaust will be clear
affected will be unchanged
C H K

II only either I or II neither I nor II

firing period delay period advance period

Higher than normal firing High fuel consumption Lower than normal
pressure and low and high exhaust compression pressure
exhaust temperature temperatures and high exhaust
temperature
4 through 6 1 through 4 3 through 6

cylinder compression cylinder compression scavenge and purge

pressure may not be temperature may be too process is incomplete
high enough high
a low viscosity index extreme pressure no additives
additives
diffuser aftercooler venturi

Return flow of excess Relief of excessively high Cooling water bypass

fuel oil from the injector. pressure gases from the flow to the heat sink.
cylinder.
ignition will be delayed maximum fuel expansion fuel will ignite before top
due to low ignition will occur on the dead center
temperature compression stroke
Water-cooled exhaust Aftercooler Exhaust diffuser
system
II only both I and II neither I nor II

Marine Engineer Exam Questions

entirely constant volume a combination of a combination of
constant volume and constant temperature
constant pressure and constant pressure
early fuel injection high exhaust decreased effective
temperature from that stroke from that injector
cylinder
nonreturn valves an auxiliary cold start the component labeled
heater core "U"

increased exhaust back early timing of fuel low scavenge air

pressure injection temperature
down to burn off fuel down to compress the up and force out the
fuel air charge exhaust gases
ignition will be delayed maximum fuel expansion fuel will ignite after top
due to low compression will occur on the dead center
pressure compression stroke
high alkaline reserve low flash point high pour point

Air charge density will be Brake specific fuel Cylinder combustion

increased. consumption will be temperatures will be
increased. lowered.
45‚-55‚ 66‚-76‚ 106‚-115‚

cylinders fuel strainers all of the above

Cutting oil High grade vegetable oil Detergent oil

provide scavenge air maintain a vacuum on maintain a positive
pressure at low load the crankcase pressure on the
crankcase
of the bevel on the piston formed by the crank arm formed by the master
oil control rings and crank pin and link connecting rods
lube oil filter crank case pump rocker arm reservoir

Blower timing gears Air trapped between Oil filter between blower
blower lobes lobes
excessive fuel nozzle a distorted fuel spray leakage past the plunger
holder cooling pattern into the oil drain
viscosity of the oil rpm of the shaft all of the above

Marine Engineer Exam Questions

Two-helical lobes Three-cylindrical lobes Two-cylindrical lobes

length of the piston length of the cylinder speed of the engine

liner
drain filters and strainers use ether to start the blow through the
and bleed off water at engine with blowdown cylinders and fuel lines
each injection pump valves open with a drying agent
warm at idle warm at full speed warm at full speed and
no fuel dilution exists
once every two once every piston stroke twice every piston stroke
crankshaft revolutions
create high lube oil cause the engine to cause blue smoke in the
temperature overspeed exhaust
decrease maintenance allow for higher blower produce a more constant
operating speeds airflow
when fuel vaporization should continue through should be completed
has been completed the afterburning period after top dead center

water condensation in fuel dilution of the lube air in the fuel system
the cylinders oil
excessively high excessively high bearing excessive carbon buildup
crankcase vacuum temperatures in the lube oil
rotate in the same rotate in opposite decrease objectionable
direction directions turbulence in the
cylinders
Fuel/Air ratio Compression pressure Lube oil pressure

water condensed in the fuel dilution of the lube air in the fuel system
cylinders oil
more amps per kilowatt higher no-load RPMs higher voltage output
hour
exhaust and intake maximum compression fuel injection occurring at
valves just closing pressure is just being that point and
attained combustion begins
overheat without operate with reduced run away without load
smoking power or stop
resist emulsification neutralize acids resist oxidation at high
temperatures

between the casing and after the engine reaches as air moves into the
blower lobes operating speed discharge passage

Marine Engineer Exam Questions

remove condensation check the compression check for proper lube oil
from the cylinders pressure
oxygen corrosion of the the pistons to seize blue smoke
fuel lines
Low carbon forming High film strength High noncorrosive
tendencies qualities

Positive displacement Axial flow Centrifugal

increasing the lube oil heating the engine fuel heating the engine jacket
pressure supply water
gasket surfaces of the discharge fittings of the suction side of the fuel oil
fuel oil filters fuel injector pumps transfer pump

fuel dilution water dilution normal oil condition

driven by an exhaust gas driven by a camshaft driven by separate motor

turbine
Pour point improvers Inhibitors Foam suppressors

To remove air bubbles To ensure that the lube To ensure foreign

from the jacket water. oil system delivers material (water etc.) is
pressure. not present in the
cylinders.
low starting air air in the fuel injection water in the starting air
temperature system system
emulsions of lube oil and coagulation of unburned All of the above.
water fuel below the piston
rings
check the crankcase oil change the fuel oil clean the air filter
level strainers
water condensed in the fuel dilution of the lube air in the fuel system
cylinders oil
positive feed lubricators four-stroke engines two-stroke engines
are installed on all usually utilize a heavier usually consume less
bearings of four-stroke grade of fuel oil than two- lube oil than four-stroke
engines, whereas as a stroke engines engines
splash feed system is
used on two-stroke
engines
decreases the density of increases the specific decreases the specific
the air heat of the air heat of the exhaust
Fuel oil strainers Crank case oil level Pyrometer readings

loosening the changing fuel filters pumping down the day

compression nuts at the tanks

Marine Engineer Exam Questions

a metering helix inside varying the physical varying the clearance
the pump length of the plunger between the injector cam
stroke and the injector rocker
arm
density of the air charge scavenge effect will exhaust pressure will
will decrease increase increase

The thermostatic water The fuel filters should be The engine should be
regulating valves should changed. turned over slowly with
be manually opened. the indicator cocks open.
worn gaskets in the partially clogged fuel oil loose fittings in the
transfer pump discharge discharge strainers booster fuel pump
lines suction piping
Run at reduced speed Switch to diesel fuel and Nothing needs to be
until the cooler can be run at full speed. done due to the low
repaired or renewed. heating value of heavy
fuel.
reduce friction overcome inertia ignite the fuel

air box pressure brake mean effective all of the above

pressure
Higher than normal Longer starting periods Higher than normal lube
temperatures for start up oil pressure
turbine wheel blading diffuser passages inlet volute
shifted to a fuel having a shifted to a fuel having a introduced supercharged
lower cetane number higher cetane number air into the starting air
system
Excessive ring Over lubrication All of the above
temperature
overheating without failure to start a run away without load
smoking
Compression of the air is Air delivery is Air delivery is inversely
accomplished in the rotor approximately proportional to engine
housing. proportional to engine speed.
speed.
Check the sump oil level. Verify proper lube oil Check the water level in
pressure. expansion tank
blue smoke the engine to stop piston seizure
faulty governor high exhaust back all of the above may
pressure cause this problem

air-bound fuel system improper spark change in viscosity

Marine Engineer Exam Questions

enter the engine along enter the engine before leave the turbocharger
with the increase in fuel the increased fuel supply as a negative pulse

Lube oil pressure Exhaust temperatures Raw water pressure

sediment in the fuel distortion of the fuel improper atomization of

supply spray pattern the fuel
stationary diffuser compressor outlet volute rotating impeller vanes
passages
Interrupt the fuel flow to Disengage the safety Slide the camshaft to the
the engine. interlock. neutral position.

overspeeding of the excessive cooling of the injector damage

engine engine
proportion of trapped air thermodynamic efficiency all of the above
that is utilized in the of the engine cycle
combustion process

Admission of starting air The way of the vessel Securing of fuel to the
cylinders
dirty fuel broken fuel lines excessive vibration

fuel injection pressure combustion pressure on compression pressure on

the power stroke the compression stroke
reversing the reduction changing the gear ratio reversing the servomotor
gears

fuel injection system high cylinder lube oil low intake temperatures
malfunctions temperatures
fuel dilution is increased exhaust valves may be all of the above
at low load damaged

contaminated fuel kinked fuel lines excessive engine

vibration
the pressure drop across high fuel oil tank increase flow rate from
the filter temperature the filter
at a pressure below during the valve overlap with only the exhaust
atmospheric period valve open
more complete cylinder extended valve life carbon formation on
scavenging combustion chamber
surfaces
contaminated fuel coated fuel lines excessive vibration

preheating the reducing air charge preventing valve wear

combustion chamber density
Burning of intake valves. Excessive firing Increased fuel
pressures. consumption.

Marine Engineer Exam Questions

checking lube oil checking cam position using a timing light
temperature

high exhaust low exhaust temperature low exhaust temperature

temperature and high and low firing pressure and high firing pressure
firing pressure
equalize cylinder and alleviate the difference in flush out condensate that
exhaust manifold valve size between the collects after each
pressures intake and exhaust compression stroke
high water jacket overheated pistons and an increase in lube oil
temperatures cylinders viscosity due to fuel
dilution
check for an exhaust check the cooling water notify the bridge that you
leak temperature are going to shut the
engine down
increase in cylinder leaking needle valve reduction in cylinder
turbulence turbulence
energy supplied to the air pressure to the intake purge of exhausted
turbocharger manifold gases from the cylinders

To add stability to the To add rigidity to the To make a surface for

engine block. block and a surface for the base.
attaching other parts.
forms sulfuric acid in the causes pitting and failure causes sludge deposits
lube oil of the bearings on valve stems
rotary motion of the reciprocating motion of developed differential
camshaft the piston
Decrease the load limit Increase engine RPM. Ignore this situation as
setting. the engine can handle
the load increase.

fuel penetration fuel spray tip angle fuel injection rate

engine load brake horsepower brake specific fuel

consumption
handwheel nut-operated clamp large gasket

vaporization atomization gasification

the air is compressed in the blower speed is the blower lobes are
the air cleaner proportional to the lubricated by the engine
engine speed lube oil
Block the fuel supply by Shut off the fuel supply Relieve all pressure in
closing the master fuel and block the flow of the fuel system.
valve. intake air.

Marine Engineer Exam Questions

The greater the The degree of Atomization and
atomization, the lesser atomization has nothing penetration are one and
the penetration. to do with the degree of the same.
penetration.
Secure or reduce fuel to Screw down on the Readjust the injection
that cylinder. pressure adjusting spring timing.
to decrease popping
 pressure.
act as an emergency fuel change fuel from heavy recirculate fuel through
shut off, regardless of to light oil or vice-versa the heater during warm-
the fuel being used while insuring that oil is up
returned to the proper
day tank
Compression of the air is Air delivery is All of the above
accomplished between approximately
the rotors. proportional to engine
speed.
misfiring low fuel oil pressure All of the above
To ensure the fuel To clear the smoke To let the waste heat
nozzles are flushed stack. boiler reduce it's rate of
clean. steam generation.
push out exhaust gases force cool air across the maintain a positive
and replace them with radiator, lowering the charge of fresh air in the
fresh air jacket water crankcase thus
temperature eliminating the chances
of a crankcase explosion
overspeeding the engine securing the fuel supply securing the ignition
system
between the casing and after the engine reaches as air moves into the
blower lobes operating speed discharge passage
The temperature of the The heating steam to the The heating steam must
fuel from the preheater preheater should be be secured before the
should be gradually secured as soon as the diesel oil passes
reduced after switching diesel fuel passes through the three-way
over the three-way valve. through the three-way valve.
valve.
increase in air leakage decrease in air leakage increase in clearance
past the rotors past the rotors between the mating
lobes
They are expensive. They cannot be They require special
replaced. tools for removal.
Between the casing and After the engine reaches As air moves into the
blower lobes. operating speed. discharge passage.
engage the jacking gear secure the lube oil pump shut off the fuel at the
day tank

Marine Engineer Exam Questions

is geared so that air flow reverses rotation along exhausts to atmosphere
through the blower is with the engine when turning astern
always in the same
direction
make sure the fuel prevent pressure buildup prevent damage from
nozzles are flushed in the fuel lines localized overheating
clean
"A" turns clockwise; "B" "A" turns Both turn
turns counterclockwise counterclockwise; "B" counterclockwise
turns clockwise
break in the most worn wear eccentrically on the overheat and jam at the
part of the cylinder when side opposite the end top center on the
the rings expand gap combustion stroke
valve loss back pressure loss pumping loss

hone the cylinder liner to compress the rings file the ends of the rings
allow ring installation tighter with a
compressing tool
gap clearance radial thickness face thickness

center of the cylinder point of maximum point of maximum ring

cylinder wear wear

prevent blower oil provide adequate blower prevent abnormal air

leakage lubrication leakage

renewing the driven gear renewing both driving shimming and pinning
and driven gears as a set the gears with proper
backlash
seat in more slowly slap in the groove stick in the groove

Broken blades Stretched blades All of the above

Scuffing of the liner Piston seizure All of the above

Soak the dirty filter in Blow out the air inlet with Cover the air inlet after
kerosene only. compressed air. removing the filter.

normal conditions ring blow-by a leaky fuel injector

High cylinder oil Leaking exhaust valves All of the above.

consumption
shiny face, black top, shiny face, bottom, back black face, bottom, back
back and bottom and top and top
 Marine Engineer Exam Questions
Blank off the exhaust gas Secure cooling and Lock the rotor of the
inlet to the damaged lubrication to the damaged turbocharger.
turbocharger. damaged turbocharger.

combustion gas blow-by excessive lubrication properly functioning rings

Increase the Increase the exhaust and Increase the ignition lag.
compression ratio. intake valve overlap.

has a crown-face exceeds wear limits has excessive blow-by

through normal wear

smooth, shallow groved, smooth surface of smooth surface

chrome surface stainless steel displaying areas of
stainless steel and
chrome
Retard the intake valve Advance the intake and Advance the intake valve
opening and advance the exhaust valve opening opening and retard the
exhaust valve closing period. exhaust valve closing
period. periods.
insufficient lubrication improper piston cooling blow-by

The intake valve opening The intake valve opening The intake valve opening
is advanced and the is unchanged and the is retarded and the
exhaust valve closing is exhaust valve closing is exhaust valve closing is
retarded. advanced. advanced.
lube oil pumping rotating rings gas pressure behind the
ring
An increased air A decrease in the air Excessive condensate
temperature differential pressure differential forming in the air box.
between the cooler inlet across the cooler.
and outlet.
cause blow-by chemically attack the form an emulsion of lube
piston skirt oil and water
Excessive piston blow-by Insufficient cooling water Accumulated water in the
to the manifold. flow. air boxes.
Faulty combustion Excessive ring Over lubrication
temperatures
damaged upper piston scored piston walls damaged cylinder liners
rings and/or ring lands
Faulty turbocharger Faulty turbocharger Insufficient cooling water
turbine diffuser ring compressor ring flow

an electric grinder a metal scraper a reamer

 Marine Engineer Exam Questions
a taper faced ring can be the cylinder surface is inlaid rings can be
used honed to the smoothest utilized in which the
surface attainable chrome center of the ring
face slightly protrudes
beyond the cast iron
edges
Injection of ether into the Thermostatically Thermostatically
air intake. controlled electric water controlled electric oil
jacket heater. sump heater.
Intake manifold pressure Intake manifold pressure Exhaust temperatures
will be high. will be unaffected. will be high.

carbon vanadium calcium

Open the crankcase Apply fire fighting water Allow the engine to cool
immediately to check for through the crankcase before opening the
damage. breather. crankcase.
In a two-stroke/cycle Some provision must be No gap is required to
engine, the rings run made in a two- exist between the ends
hotter, requiring the end stroke/cycle engine to of the ring when cold in a
gap to be greater. keep the rings from two-stroke/cycle engine,
binding in the ports. but a small gap is
required in a four-
stroke/cycle engine.
The coolant temperature The thermostatic bypass The pressure cap must
must be maintained at valves must be manually be removed while the
180°F. opened before the engine is secured.
engine is started.
The vanadium content is The vanadium content is The vanadium content is
2 ppm. slightly above acceptable well within recommended
values. limits.

immediately open all increase crankcase allow the engine to cool

crankcase relief ports exhauster speed to draw naturally
cool air into the engine
turning down the piston knurling the piston skirt building up the piston
skirt to concentric values surface skirt with a liquid epoxy
material and then
remachining
3 continuous starting 6 consecutive cranking 9 repeated starts under
sequences cycles load

Full power cannot be The exhaust will contain Complete combustion

developed. black smoke. will be impossible.
high flash point and high low flash point and high low heating value and
viscosity viscosity high sulphur content
inspection covers should ventilation system should scavenge pump should
not be opened until the be continued in operation be immediately secured
engine has cooled for one hour for cooling to prevent loss of lube oil

Marine Engineer Exam Questions

Dirty lubricating oil Minimal cylinder liner Insufficient ring groove
wear clearance
Steam or hot water lube Thermostatically Electric resistance
oil heating. controlled electric water heaters in the air intake
jacket heating. manifold.
crankcase exhauster overload on the obstruction in the engine
overload intercooler cylinders
Increased valve wear Excessive oil pumping Increased fuel
consumption

The sump lube oil The explosion relief The crankcase should
scavenge pump should valves should be remain unopened until
be secured manually opened. the engine has cooled.
immediately.
scuff the cylinder liner hammer the piston land hammer the piston land
excessively above the ring below the ring

using a special fuel increasing the starting air heating the jacket water
having a high ignition supply
temperature
timing out of adjustment excessive cylinder leaking rotor bearing oil
lubrication seals
carbon hydrogen sulfur

piece #5 will rotate piece #7 will move to the spring #11 will be
counterclockwise as left compressed
viewed from the right
carbon will accumulate combustion gases will piston side thrust will be
behind the ring penetrate beneath the increased
ring land
increasing the lube oil heating the engine fuel heating the engine
pressure supply coolant
the engine to overspeed a fire all of the above
cause clogging of the increase the ability of the produce corrosion in the
fuel system engine to start in cold cylinder and exhaust
weather system at low loads
Protect the crankcase Utilize exhaust gas Secure the engine in the
from overpressure in the pressure to supercharge event of dangerous
event of explosion. a diesel engine. overspeed.
cylinder liner should liner surface should have counterbore is slick and
have a glazed a crosshatch pattern smooth
appearance
maintain the proper maintain the proper keep the engine room
jacket water pH expansion tank water warm

Marine Engineer Exam Questions

Lube oil dilution Preignition Corrosion

shorten the ring break-in prevent cylinder liner appear slick and glazed
period glazing
increased cylinder liner intake valve stem varnish deposit on
wear corrosion pistons
reciprocating scavenge rotary blower because it gas driven turbocharger
pump because of its operates at close because it has a wide
direct linkage to the tolerances over a small speed range and high
crankshaft range of speeds and temperature materials
delivers its air charge at that are subject to
a certain resonant resonant vibration
frequency
corrosion and gumming salt deposits in the slag deposits in the fuel
of the fuel injection pump exhaust manifold injection equipment
Liner wear is distributed Excessive liner wear Liner wear is normally
equally between upper causes wear between greatest in the middle of
and lower portions of the piston rings and grooves. the cylinder.
cylinder.
increase in lube oil compression expansion jacket water heater
viscosity device
high ambient air oil leaking into the insufficient piston ring
temperature turbocharger compressor blow-by
end
ignition qualities rates of vaporization viscosity
Along the lower part of Opposite the top ring Opposite the oil control
the liner wall opposite shortly after piston travel ring when the crank is on
the oil control ring. has ended the bottom dead center.
 compression stroke.
octane number ignition index number volatility point

effectiveness of type of fuel used all of the above

lubrication
controlled by reducing proportional to the lube eliminated by heating the
the compression ratio oil viscosity intake air
Increasing exhaust Reduction in engine All of the above
temperatures before the speed.
turbine.
cetane number viscosity in Saybolt air fuel ratio
seconds
abnormally high cooling rapid wearing of piston combustion gases in the
water temperature rings cooling water
increased moisture increased drag of pistons higher compression
content of inlet air in cold and bearings due to pressures reached due
weather increased oil viscosity to smaller clearances

Marine Engineer Exam Questions

The inertia of the Exhaust gas pumping Exhaust gas back
turbocharger rotor losses are increased due pressure falls slightly due
causes a time lag which to turbine windage. to increased nozzle
delays the turbocharger action.
speed increase.
Sulfur content Pour point Cetane number

replace parts #13 and run a die over the use a double locknut
#14 threads of part #14
12345678 24681357 72365841

diesel engines designed medium-speed, four- small diesel engines

to burn residual fuels stroke/cycle diesel started with an electric
engines motor and batteries
acid content heating value ignition quality
plunger motors gear motors accumulator motors

calorific value of the fuel flash point of the fuel rate of fuel consumption
hydraulic compression compressed air none of the above

Insufficient heat transfer Blocked cooling water Excessive scavenging air

from the exhaust valves passages to the head provided to the engine
vane type impeller type accumulator type

cetane number viscosity calorific valve

accurately measuring the directly measuring the using the paper or
elongation of the plastic width of the flattened cardboard gauge printed
rod along the bearing plastic rod with a vernier on the plastic rod
surface caliper package to measure the
flattened width
Electric generator Electronic SCR Air motor

volatility point viscosity index octane number

ring "snap" gauge inside vernier caliper outside micrometer

Electric Compressed air Centrifugal

Marine Engineer Exam Questions

The cetane number is an Ignition lag is reduced The cetane number is of
indication of the fuel's with fuels having a high little significance in the
viscosity. cetane number. combustion process.
outside caliper bridge gage tram rod

a three-way automatic an overrunning clutch all of the above

valve
affects the starting ability determines the amount affects the compression
of a cold engine of fuel penetration ratio of an operating
engine
Depth gage Copper shims Wooden gaging pegs

provide air for engine supply a backup source supply the independent
supercharging of starting air source of reversing air

excessive fuel oil reduced ignition lag smoother engine

consumption operation
an anvil faced plasti-gage a vernier caliper
micrometer
Roots-type blower air centrifugal air multistage reciprocating
pump compressor air compressor
The cetane number is an Ignition lag is reduced The cetane number is of
indication of the fuel's with fuels having a high little significance in the
viscosity. cetane number. combustion process.
Pressurized tank Distributor assembly Cylinder check valve
The higher the cetane The highest cetane All of the above.
number, the shorter the number of fuel is 100.
ignition lag.

decreased compression increased bearing decreased bearing

ratio clearance clearance
lube oil carbonization discharge pulsations interstage vapor lock

higher the cylinder more complete the fuel more rapid the rise in
combustion temperature combustion combustion pressure
Increased connecting rod Decreased compression Increased compression
bearing clearance ratio ratio

has a lower effective operates with scavenge operates without energy

compression ratio air under a positive absorbing intake and
pressure exhaust strokes
high heating value of the amount of carbon internal flow resistance in
fuel residue after combustion the injectors

Marine Engineer Exam Questions

decrease remain the same increase on
compression; decrease
on expansion
electric starting motor direct air admission vane type air motors

cetane number of 45 octane number of 55 octane number of 45

build up the cylinder insert shims between the install a thinner head
head by metal spraying crankpin bearing box and gasket
the connecting rod foot
Hydraulic Air All of the above

monkey wrench pipe wrench slugging wrench

Higher temperatures Lower temperatures Higher compression

create higher create higher ratios create lower
compression ratios. compression ratios. temperatures.
When starting air is The air starting valve is During normal engine
secured, the air starting opened by cam action. running, the air starting
valve is closed. valve opens and closes
constantly due to cam
action.
the diesel fuel used mechanical rigidity in the a decrease in the fuel
having a high viscosity lube pump mechanism pump delivery pressure
a clogged connecting rod incorrect connecting rod high cylinder firing
oil passage alignment temperatures
Full valve opening will The valve will reseat The valve gear will not
occur slowly. abruptly. bounce.
high fuel oil supply flow scored plunger and excessive air turbulence
barrel packing
quick opening main air pilot air start check valve individual cam for each
valve pilot valve

increase engine load decrease engine power improve fuel economy

removed each time the left in place for all four reset to zero for all four
crankshaft is readings readings
repositioned
B C D

compression of air by the friction in the fuel injector fuel oil heating system
piston

Marine Engineer Exam Questions

measuring the crank rotating the crankshaft taking micrometer
drop on either side of through one revolution, readings between the
each crank throw while pausing each 90° of crank cheeks opposite
the crankshaft is slowly rotation to measure the crankpin every 90° of
rotated through one bearing clearances, top crank angle rotation
revolution and bottom
Gradual lift with a short Abrupt lift giving full Gradual lift giving full
fully open period, and valve opening for a long valve opening for a long
accelerated valve period, with gradual period, with gradual
closing. valve seating. valve seating.
firing pressure in the quality of fuel to be duration of the ignition
engine injected delay period
Outside micrometer Strain gage Gage block
a cylinder check valve individual cams and an air manifold poppet
 valve gear valve
Exhaust events starting Exhaust events lasting Higher combustion
before scavenging longer than scavenging temperatures.
events. events.
209° 315° 360°

an air manifold a hydraulic distributor individual cams and

valve gear
electrical discharge from heat of compression heat from the fuel
the distributor within the cylinder injection nozzle
excessive valve lash worn connecting rod all of the above
bearings
individual distribution cylinder air starting high pressure in the
valves check valves starting air manifold

worn main bearings excessive valve weak rocker arm springs

clearance
excessive spring spring surge worn valve seats
compression
cylinder quill lubricators air check valves diffuser vanes

plunger spring oil pressure rocker arm

Air start valve Reversing air valve Pilot air valve

water micro-organism growth all of the above

insufficient lubrication abnormal wear fatigue failure

Direct mechanical type Pilot operated type Distributor type

with check valve

Marine Engineer Exam Questions

Transfer pump Auxiliary bilge pump Centrifuge transfer and
discharge pumps

misalignment improper valve loose-lock pins

adjustment
Increasing the starting air Opening the starting air Reducing the starting air
pressure used valve quickly valve size
overflow line feed line sounding tube
9,111 kW 12,388 kW 24,776 kW

spring force air pressure on top of the air pressure on the

valve differential piston bottom of the valve
differential piston
allow air to escape from make fuel available for all of the above
the fuel immediate use
Open all air space drain Open all indicator valves. All of the above.
cocks.

air pressure cylinder pressure a cam follower

a leaky cylinder head a cracked cylinder liner all of the above

gasket
the same as engine twice engine speed four times engine speed
speed

fuel filter clogging moisture formation inadequate transfer

pump suction head
As water vapor Demulsifying lube oil Condensation from vapor
contained in blow-by. passing through the main formed in the expansion
bearings. tank.
storage tank and the starting motor and the pump and the starting
pump reserve tank motor
X Y Z

hand pump accelerator accumulator

Diesel fuel Lube oil Gasoline

excessive water in the a leaking intercooler excessive moisture in the

fuel scavenge air
The right end of the This system cannot Hand pump charging of
accumulator "E" is operate at temperatures the system is possible,
charged with nitrogen. below 32‚F. but a minimum of 20

Marine Engineer Exam Questions

operation within the excessive purifier excessive oil viscosity
explosive range of the operating pressures
fuel
early and close late late and close early late and close late
reservoir hand pump electric pump

fuel oil sea water diesel intake air

Worn, broken or stuck Damaged rubber rings Defective rubber seal
compression rings. on the valve seat insert. rings in the valve guides.
cranking motor reservoir pump starter control valve

using it in the engine heating the fuel tanks straining the fuel

compression pressure scavenge air pressure exhaust manifold

pressure
electric (battery) starting glow plug starter gasoline engine starter
system system
side gap bottom

Hydraulic Pneumatic Electrical

the system does not hydraulic systems turn the system can be
require high pressure diesel engines at higher manually recharged
piping rates of speed than air
starters
Poured babbitt, self- Split roller Precision insert
aligning

additive percent cetane number TBN number

Light fuel oil settling tank Light fuel oil boiler tank Light fuel oil booster tank

oil control rings valve seats compression rings

hydraulic governor valve lash adjusters cooling system

Poured-type consisting Poured-type with shims Replaceable precision-

of babbitt type
increase specific gravity separate fuel from lube reduce fuel viscosity
oil
high exhaust excessive lubrication floating piston pins
temperatures
plasti-gage feeler gage round solder wire

Gear Turbine Centrifugal

side clearance gap clearance taper clearance
Marine Engineer Exam Questions
the exhaust valves to be positive closing action of positive rotation of the
lubricated through an the exhaust valves exhaust valves
internal lube oil passage
Piston Gear Vane
bearing shell halves connecting rod bushing piston pin bushing

Water Lubricating oil Sulphur compounds

The lash adjuster The ball check is always The bridge spring applies
maintains zero lash seated when the exhaust pressure to maintain
between the end of the valve is closed. contact between the
valve stem and the valve plunger and the exhaust
bridge. valve.
the overrunning clutch closing the starting check the pivoting of the shaft
valves from being engaged with
the flywheel
reprime the purifier slow the centrifuge to its install an additional
proper speed discharge ring
compression rings cylinder liner seals cylinder liner sealing ring

Valve lash is The engine head is fitted All of the above.

mechanically adjusted. with replaceable valve
seats.

starter drive shaft a differential spring solenoid throw out action

rotation
The exhaust valve cam The pistons ride in dry- Fuel pump camshafts
follower is located below type cylinder liners. are located on each side
the camshaft. of the engine.
the cover clamp needs the purifier has a bad water is discharged from
tightening vibration when started the overflow line
compression and scraper cylinder liner sealings cylinder liner ring
rings grooves
the threaded sleeve's centrifugal force electromotive force
rotation
exhaust valves intake valves all of the above

purifier will act as a oil will be lost through the oil solids will be
clarifier at the discharge water discharge ports deposited only at the
ring intermediate top disk
back of the ring groove bottom of the ring groove piston ring end clearance

Dual sets of valve Valve lash is Both exhaust valves are

springs are used for mechanically adjusted at opened simultaneously
each valve to reduce the top end of the push by the valve bridge.
valve bounce. rod.
Marine Engineer Exam Questions
muff coupling and automatic pinion-shift friction clutch mechanism
release mechanism (Bendix) mechanism
The cam follower for the The fuel pump stroke is The valve lash is
fuel pump is located manually adjusted by mechanically adjusted by
above the camshaft. rotating piece K. rotating piece E.
heat transfer from restricted cooling overheated intake valves
exhaust valves passages
Turbulence is provided The valve spring shown The top piston rings are
by the air intake ports. is under slight prevented from
compression. overheating by a heat
dam.
5516.3 RPM 10312.5 RPM 26400 RPM

the rocker arms are two or more valves must hydraulic valve lash
pivoted near their be opened and closed at adjusters are used
centers the same time
remove the discharge slow the purifier to its put in an additional
ring proper speed discharge ring
contaminated lubricating high main lubricating oil insufficient ring groove
oil system temperature clearance
Beveled edges on the Low alloy steel Poppet type design
valve head construction
45 52 53

allow for expansion transmit forces evenly improve the piston seal

The quantity of water to The specific gravity of The quantity of dirt to be

be removed from the the fuel. removed from the fuel.
fuel.
the underside of the faulty nozzle spray all of the above
piston crown being
excessively dirty,
lowering the rate of heat
transfer
increase overall valve assist in dissipating heat reduce the overall weight
strength due to the high due to the extreme of the valve thus helping
gas pressures operating temperatures eliminate valve spring
surge and hammering
explosive cartridge inertial flywheel motors compound gear motors
motors
Full floating Solid Fixed
excessive fuel loss of power all of the above
consumption

Marine Engineer Exam Questions

a breakdown of the lube worn piston boss piston fluctuating gas pressure
oil film on the cylinder pin bearings in the combustion space
wall
low-alloy steel is used a replaceable valve disk the self-centering action
throughout is welded to the head comes from motion of
the valve stem in the
guide
overrunning clutch drive Dwyer-drive single phase 110 volt
induction
The piston pin is bolted The piston is free to All of the above.
to the connecting rod. rotate on the carrier
thrust washer.
lbs/bhp-hr BTU/lb PLAN
Excessive liner wear Excessive, but uniform Liner wear is normally
causes wear between liner wear will not cause greatest in the middle of
piston ring and groove. wear between piston the cylinder.
ring and groove.
Cylinder relief Exhaust Blowdown

increased crankshaft slightly greater piston decreased side

bearing wear wear pressures
piston speeds increase injection pressures engine speeds decrease
decrease
knurling the piston skirt operating an overheated using scuff resistant
engine piston rings
muff coupling and friction-type clutch Bendix drive or similar
release mechanism
floc point depressive alkalinity ignition quality
additives
skirt making the greatest highest pressures being tremendous acceleration
amount of contact exerted rate
energy supplied to the air pressure to the intake cooling effect on the
turbocharger manifold exhaust valves

will carry a 100% require a current/voltage will overheat if operated

overload for a brief regulator for proper continuously over 10
period operation seconds
beneath the piston crown at the base of the piston inside the cylinder liner
 skirt cooling water jacket
oil consumption will oil consumption will the ring will immediately
decrease increase seize and buckle

Marine Engineer Exam Questions

B Q T

alternating current 400 cycle per second low amp, high voltage
motor-generators AC
keep piston crown reduce the possibility of help retain the heat of
temperatures elevated overheating the top compression to prevent
for smoother compression ring ignition delay
combustion
The oil control rings will The piston will overheat Excessive oil will remain
seat improperly and wear due to insufficient on the cylinder wall.
rapidly. lubrication.
most critical in a four- most critical in a two- most critical in a four-
stroke/cycle diesel stroke/cycle diesel stroke/cycle diesel
engine engine engine if it is
turbocharged

higher speed required flywheel effect lower starting

temperatures

at the transfer pump in the settling tank in the three-way valve

discharge
excessive ring action excessive ring improper ring rotation
temperature
increase back pressure facilitate periodic reduce the pumping loss
during the exhaust replacement of the associated with
process valves scavenging
have a generator as a need a current-voltage will overheat if operated
source of power regulator for proper continuously over ten
operation seconds
twice as large as with a the same size as with a half as large as with a
cast iron piston cast iron piston cast iron piston

excessive lube oil lower than normal lube higher than normal
consumption oil temperature exhaust back pressure
natural aspiration masked intake valves air cells

9 10 11
bearing shell connecting rod bushing piston pin bushing

poor cooling of cylinder improper cooling of the insufficient piston

walls piston lubrication
air intake a fuel outlet cooling water inlets

one-half engine speed the same as engine twice engine speed

speed

Marine Engineer Exam Questions

connecting rod bushing connecting rod cap piston pin bushing

lube oil viscosity uneven heat expansion uneven heat expansion

breakdown of the rings of the piston
furnish energy to the reduce engine room all of the above
turbocharger noise
piston cylinder liner crank cheek

a clogged air filter excessively early fuel malfunctioning valves

injection
bourdon gauge pneumercator manometer

starting air stops flowing starting control valve (3) discharge line (E) will
to the respective cylinder will immediately pull back begin to get hot
from the cam

allow the scavenge ports prevent scavenge air prevent the exhaust
to open and close pressure buildup in the piston from reaching
simultaneously with the cylinders TDC and BDC before the
exhaust ports intake piston
high cooling water worn or broken piston low fuel oil pressure
temperature rings
exhaust gas pyrometer fuel flow rate meter exhaust gas analyzer

When starting air is The starting air valve is During normal engine
secured, the air starting opened by cam action running, the starting air
valve is closed. during starting. valve opens and closes
constantly due to cam
action.
receive more power than operate the fuel oil rotate faster than the
the upper shaft booster pump upper shaft
The scavenging ports Neither the exhaust nor The exhaust and
would open before the the scavenging ports scavenging ports would
exhaust ports. would open. open simultaneously.
increased lube oil lower lube oil excessive leakage past
pressure temperature the piston rings
flame intensity exhaust gas temperature crankshaft axial
alignment
Full valve opening will Full valve opening will The valve gear will not
occur slowly, but reseat occur slowly, but abruptly bounce.
quickly. reseat.
pinion crosshead compression rings

leaking cylinder liner seal late fuel injection timing carbon deposits on the
rings piston

Marine Engineer Exam Questions

fuel oil cooling water cylinder liner

Air pressure from the Control air pressure is The downward intake
starting air inlet is applied to the top of the stroke of the main engine
applied to the top of the starting valve piston. cylinder draws the
starting valve piston. starting valve open.
improperly seated valves low fuel oil pressure worn or broken cylinder
liner sealing rings
fuel oil entering the exhaust gases at various lube oil at the bearing
injector locations supplies
control air pressure on spring tension on the venting the starting
the guide piston acting valve piston with a system air distribution
downward on the valve momentary interruption
piston of reservoir air

compression load during inertia load once every bending loads at bottom
power and compression four crankshaft and top dead center
strokes revolutions
carbon deposits on the leaking cylinder liner seal a leaking cylinder head
piston crown rings gasket
adjusting fuel racks to adjusting the load limit calculating engine
maintain equal loading setting of the governor at horsepower
between cylinders idle conditions
ensure proper operation prevent damage to the increase the air charge
of the Bendix pinion valve seat density to the motor
excessive mechanical excessively worn fuel excessive exhaust back
clearance between the pump plunger pressure
piston crown and cylinder
head
back pressure readings pyrometer readings infrared analysis

cylinder compression starting air pressure valve springs

pressure
after TDC and close after before TDC and close after TDC and close
BDC before BDC before BDC
a leaking cylinder head low fuel oil pressure worn or broken cylinder
gasket liner sealing rings
a gas-filled bellows, a thermocouples and a ammeters and
tube and a pressure voltmeter thermocouples
gauge
the spring force a valve actuating cam a pneumatic bellows
assembly
sooner and close later sooner and close sooner later and close later

Low firing pressure and Low compression Low firing pressure and
high exhaust pressure and low low exhaust temperature
temperature exhaust temperature

Marine Engineer Exam Questions

The pointer associated It can be utilized in It can indicate
with the pyrometer scale exhaust manifolds and temperature at a distant
can be made to also heat exchangers point from the source of
measure engine RPM. interchangeably. heat.
compression stroke power stroke exhaust stroke

Leaky valve cage Burned exhaust valves All of the above

A constant pressure A dry-type exhaust A constant velocity

muffler muffler muffler
close later than normal have less total lift have less total duration

leaking valves a continuously open low cooling water

scavenge air port temperature
changing directions of decreasing the accelerating the exhaust
exhaust gas flow temperature of the gas through a reduced
exhaust gases size orifice
on the exhaust stroke at the end of the power at the start of the intake
stroke stroke

Too much lash will cause Too little lash may Too much lash may
the valve to open early prevent the valves from prevent combustion
and close late. seating properly. through loss of
compression.
a clogged air filter early fuel injection burned valves

fuel is admitted only to compression is released cylinders are not chilled

these cylinders during during starting by by the expansion of the
cranking opening the exhaust starting air
valve
Valve will close later. Amount of fuel injected Amount of fuel injected
will be increased. will be decreased.
The exhaust gases are The internal baffles The exhaust noise is
not mixed with cooling break up the exhaust gas completely eliminated.
water. pulsation.
a minimum of five at least three cylinders the cylinders on opposite
cylinders equipped with equipped with air start ends equipped with air
air start valves valves start valves
having a longer duration closing sooner opening later
of opening
High lube oil High vanadium content Excessive piston slap
temperatures fuel
They cannot be located They may be water- They must be fitted with
any closer than six jacketed and cooled by one inch thick asbestos
inches from flammable the discharge from a board and covered with
materials such as pump which operates #26 USSG galvanized
woodwork, etc. only when the engine is sheet iron.
running.

Marine Engineer Exam Questions

reposition the fuel change the intake and place the starting cam in
injection cam exhaust valve cam the intermediate position
positions
mechanically adjusting changing the tappet measuring the cold valve
the valve at point "E" clearance as measured clearance between
between points "A" and components "C" and "D"
"B"
Overload Low exhaust High crankcase pressure
temperature
pressure temperature energy

be equipped with a water-have adequate insulation not penetrate the engine

cooled muffler in any berthing space room casing
Frequent testing of relief A close watch on Frequent cleaning to
valves. temperature to prevent remove oil and foreign
fluctuations in pressure. matter.
nicks in the protective a buildup of sludge cracks in the surface of
coating deposits the spring
Excessive fuel injection Very late injection timing Incorrect crankshaft
clearances
prevent exhaust smoke power a reciprocating muffle exhaust gas noise
emissions supercharger
plunger completes the friction clutch causes the control windings de-
circuit between the pinion to rotate into the energize and force the
battery bank and starting starting position plunger out
motor
more cold valve lash excessive pressure in broken valve springs
hydraulic valve lash
adjusters
Compression must be Compression must be Compression must be
low for required low to prevent low to have effective
horsepower and torque preignition. preignition.
generation.
B P U

pinion when it engages action of the friction action of the starter

the ring gear clutch solenoid

quality of fuel injected viscosity of the lube oil compression ratio of the
piston
low compression in the high exhaust poor fuel penetration
cylinder temperature
They never require any They function as spark Both have a dust
maintenance. arresters. collecting chamber.
knurling the piston skirt extended maximum applying load to a cold
power operation diesel engine
worn engine cylinder high cylinder firing stuck spring-loaded
liners pressure manhole covers

Marine Engineer Exam Questions

the engines are small they are arranged to a waste heat boiler is
auxiliary units prevent gas backflow to installed
each engine
knurling the piston skirt operating the engine scuff resistant piston
overheated rings
the proper seating of a worn cylinder liner a malfunctioning cylinder
new rings relief valve
decreasing back allowing gases to expand constant pulse charging
pressure at the exhaust and change direction of at the exhaust manifold
manifold flow
Disengages the pinion Engages the pinion with Prevents the pinion
from the flywheel ring the flywheel ring gear. starter from overrunning
gear. on the starter shaft.
insufficient lubricating oil normal wear water contamination of
and overheating the lube oil

lube oil header pressure scavenge air pressure piston ring blow-by

aid in preventing condense and drain dampen exhaust gas

turbocharger overheating moisture from exhaust pulsations in the
gases manifold
45 to 60 seconds 60 to 75 seconds 75 to 90 seconds

plasti-gage feeler gages round solder wire

faulty cylinder relief valve excessive lube oil excessive scavenge air
pressure pressure
the use of long head the use of zinc changing exhaust gas
pipes electrodes direction
pump "H" only either pump "F" or pump neither pump "F" nor
"H" pump "H"
cracks and burned spots gummy deposits and all of the above
sticking rings
increase lube oil slow the engine allowing decrease the cooling
pressure it to gradually cool water temperature to the
water jacket
diffusing exhaust increasing the exhaust reducing the exhaust gas
vibrations through gas velocity velocity
activated carbon baffles
hand pump engine-driven pump reservoir

scored piston walls damaged cylinder liners deformed piston skirts

listen for combustion isolate each cylinder and check the cylinder
knock in that cylinder inspect the injector exhaust temperature
frequently
Marine Engineer Exam Questions
engage the starter motor fill the reservoir and bypass the hydraulic
with the flywheel prevent low level in the motor when the engine is
system running
Expansion tank Cylinder test valves Sea valve

high exhaust gas sparks in the exhaust blue smoke in the

pyrometer readings exhaust
increasing the frequency the use of long head the use of zinc
of gas vibration pipes electrodes
Raw water pressure Lube oil pressure Air box pressure

injection line cylinder indicator cock banjo oiler line

sulfuric acid corrosion surface pitting of the moisture impingement on

turbocharger compressor the turbocharger
blades compressor blading
remove the emission of power a reciprocating muffle exhaust noise
exhaust smoke supercharger
pollutants
remove all plugs from the bleed off all accumulator ensure that the
system pressure accumulator piston is in
the charged position
measure exhaust gas take compression and balance exhaust gas
pressure firing readings temperature readings

low lube oil temperature excessive cylinder high air injection

cooling pressure
increasing the exhaust changing the exhaust increasing the exhaust
gas velocity gas weight gas static pressure
ensure that the hydraulic block all hydraulic hoses bleed off all hydraulic
fluid reservoir is full using high pressure pressure from the system
covers
high lube oil temperature insufficient cranking excessive fuel
speed atomization
side back radial

raise exhaust reduce excessive reduce load on cooling

temperature heating of engine room water pump
air in the fuel lines high fuel pressure excessive load

valve bridge pressure of the fresh air valve adjusting gear

charge
low exhaust valve lift excessive cylinder insufficient mechanical
cooling clearance
reduce engine load check thermostatic valve clean sea water strainer
Marine Engineer Exam Questions
loosening spring II shortening stem III lengthening stem III

the two crankshafts the piston in one cylinder the piston in one cylinder
turning in different reaching inner dead reaching dead center
directions center several when the other reaches
crankshaft degrees outer dead center
before the other piston
Cooling Fuel Electric ignition

constant pressure from cooler operation of the effective constant

the turbochargers exhaust system pressure for
turbocharger operation
Maintaining a high Lube oil entering in the Carbon buildup on the
exhaust back pressure. air intake manifold. overspeed pawl.
"E" "F" "G"

measure air intake take compression and measure turbocharger

manifold pressure firing readings torque
Gumming of the tank Immediate failure of Boiling of the water oil
relief valves. components downstream mixture as pressure is
of the compressed air reduced.
system.
air remaining in the lube oil leakage into the a broken turbocharger
cylinders air intake system valve
F H N

leaky valves stuck or broken piston low air injection pressure

rings

850°F + or - 5°F 870°F + or - 5°F 890°F + or - 5°F

Engine will stop Starting motor will Combustion gases will

dangerously overspeed enter the air starting
system
high firing pressure lube oil leakage into the high fuel oil pressure
blower
silencer outlet aftercooler inlet nozzle ring
 Lube oil standby pump Hydraulic switch and Motor drain and
and control air engage jacking gear pneumatic control
system power
spring surge worn valve seats excessively tightened
spring retainers

Marine Engineer Exam Questions

pumping action of the pressure of the fuel vacuum developed in the
piston charge manifold
Hydraulic starting Electric starting Ignition
e following systems is most likely at fault?
low exhaust back air in the fuel system gasket blow-by or
pressure leakage
variable inlet guide vane fixed blade moving blade

increasing effective bouncing of the valve splitting of the valve

spring force gear keeper collars
the proper back pressure the cooling water correct timing and proper
temperature seating
Turn the shaft with the Increase starting air Admit starting air in the
turning gear while pressure by small direction opposite to the
applying starting air. amounts until the air desired direction, then
the following actions should be taken to pressure is high enough restart in the desired
to crank the engine over. direction.
restricted turbocharger oil leak into the dribbling injector
air intake turbocharger
limit controls flame safeguard controls combustion controls
rol actuators are interlocked with the burner
tart-up, in addition to safety shutdown. These

B C H
art labeled _____________.
fuel pump should be cylinder oil feed rate cylinder oil feed rate
removed and all should be increased should be reduced
connections blanked off slightly above that used
at normal sea speed

pressure losses exhaust pulsations excessive scavenging

ust manifold pressure must occur before the
xhaust stroke to avoid _____________.
water in the fuel cold lube oil excessive starting air
pressure
reduce load check your exhaust adjust cooling water
erating under load. The load suddenly temperature
excessive black exhaust smoke, and a rapid
emperature. In response to this condition, you

The turbine operating The air is compressed in The compressor

speed is dependent on the air cleaner. operating speed matches
engine load. the engine operating
speed.
Lubrication to the Cooling water Only the turbocharger
defective cylinder should temperature to the speed should be
be increased. engine should be reduced.

Marine Engineer Exam Questions

low exhaust back floating exhaust valves excessive cranking
pressure speed
surging at governed loose engine mounting coolant leaking into the
RPM bolts cylinder
protect the crankcase utilize the flow of exhaust provide air starting
from overpressure in gases to supercharge pressure
event of explosion the engine
improper break-in wear relocation of the overlay water contamination of
flashing the lube oil system

speed of opening lift from its seat all of the above

high lube oil viscosity inadequate fuel injection excessive starting air
pressure
low fuel viscosity high injection pressure binding in the fuel control
linkage
exhaust gas water oil

jacket water thermostat cylinder liner may be raw water pump is

has failed cracked overspeeding just prior to
engine shutdown
The lash adjuster The ball check is always The bridge spring keeps
maintains zero lash seated when the valve is pressure between the
between the valve stem closing. plunger and the valve.
and the bridge.
use a higher than normal increase the fuel use a fuel having a lower
cranking speed injection pressure ignition temperature
clogged intake ports broken piston rings a faulty head gasket
speeder spring tension fuel rack lag load on the engine

valve seat insert cylinder liner all of the above

high lube oil pressure excessive compression worn valve seats and
ratio valves

excessive valve a stuck valve all of the above

clearances
engine load intake manifold pressure atmospheric pressure
height of the piston volume of the cylinder diameter of the cylinder

Marine Engineer Exam Questions

The engine is equipped The engine operates on The engine is equipped
with a constant pressure the two-stroke/cycle. with unit injectors.
turbocharger.
the overspeed trip for an obstructed air filter for air-bound fuel lines

worn valve seats tight rocker arm springs excessive valve

clearance
engine speed kilowatt load fuel injection pressure

length of the crankshaft volume of the clearance weight of the piston

space
camshaft piston movement exhaust valves

starting air pressure scavenge air pressure overspeed trip

white vapor in the high exhaust pyrometer continuous spring surge

exhaust gas readings on that
particular cylinder
belt drive exhaust gases electric motor

6 to 1 7 to 1 7.5 to 1

a roots-type blower exhaust ports or valves direct to the atmosphere

low compression ring gear with broken overheated motor

pressure teeth windings

loose tapered collars a damaged inner valve worn exhaust valve

spring guides and seals
5160.31 cubic inches; 6450.25 cubic inches; 6450.25 cubic inches;
14.95:1 14.97:1 14.99:1

#4 #5 #6

Hydraulic Electric Air motor starting

mean effective pressure exhaust back pressure compression pressure

increase decrease remain unchanged

Marine Engineer Exam Questions

brake horsepower displacement cylinder volume

exhaust pressure valve spring pressure rocker arm movement

low lube oil viscosity low compression a faulty Bendix-drive

pressure
TBN of the lubricating oil Temperature of the lube Completeness in the
oil mixing of the fuel and air
higher exhaust increased turbocharger higher air box pressure
temperature speed
area times the piston area times the piston volume times the piston
stroke stroke times the number stoke
of cylinders
insufficient heat of fouling of the air intakes improper injection timing
compression
begins on a constant begins on a constant ends on a constant
volume basis pressure basis volume basis

prevent movement of the hold the valve against its position the bushing to
bushings seat the cam
the fuel timing will be too the heat of compression the lube oil viscosity will
late will be insufficient to be too low
ignite the fuel
four-stroke/cycle on the two-stroke/cycle on the four-stroke/cycle on the
exhaust stroke exhaust stroke intake stroke
Compression Combustion-constant Combustion-constant
volume pressure

spring compression engine speed the natural frequency of

vibration
fuel control rack had engine speed does not engine has failed to
admitted excessive fuel match the fuel rack reach its firing speed
setting
the same indicated twice the indicated one half the indicated
horsepower as a four- horsepower as a four- horsepower as a four-
stroke/cycle engine stroke/cycle engine stroke/cycle engine
a cylinder volume of 166 16° of crankshaft motion a 16 to 1 compression
cubic inches between lines A and B ratio
air intake is restricted engine is cranked too vibration dampener is
fast faulty
higher working the use of scavenge fewer power strokes per
temperature of piston ports revolution of the
and cylinder crankshaft

The combustion gases The crankshaft has Pressure and volume

have expanded. rotated 90°. have increased.

Marine Engineer Exam Questions

keeping the exhaust maintaining proper avoiding light load
system free of carbon combustion and operation
deposits scavenging
High lube oil pressure Low lube oil temperature Low starting air pressure

higher cylinder head fewer power strokes per greater weight/size

temperatures revolution requirements
The intake ports close. Pressure in the cylinder Volume in the cylinder
decreases. decreases.
seawater washing up fuel oil due to leaky condensed water vapor
exhaust pipes at the injector nozzles produced from the
waterline exhaust gases
The engine will The fuel oil supply will The cooling system will
overspeed when started. become diluted resulting overheat causing the
 in rough running. engine to stall.
double-acting engine two-stroke/cycle engine four-stroke/cycle engine

Diesel Dual or Sabathe Rankine

earlier and remain open later and have greater lift later and have less
longer duration
excessive smoke from carbon deposit on the early fuel ignition
the engine exhaust exhaust valves
the use of scavenge air more complicated valve higher working
gear temperatures of the
piston and cylinder
low firing pressures and high firing pressures and high firing pressures and
high exhaust low exhaust high exhaust
temperatures temperatures temperatures
Low lube oil viscosity Late fuel injection Early fuel injection

once every two once every piston stroke twice every piston stroke
crankshaft revolutions
high firing pressure overheated air starting carbon build up in the
line exhaust ports
low starting air air bubbles in the fuel oil water in the starting air
temperature system system
provide dynamic balance counteract inertia forces provide a balance of
by equalizing centrifugal rocking couples around
force the crankshaft
exhaust stroke compression stroke power stroke

loss of engine power burned intake valves engine racing

Damage to the governor Failure to reset the Failure to reposition the
due to excessive speed overspeed trip fuel rack

Marine Engineer Exam Questions

starting batteries fuel injectors fuel pump
in the ____________.
on the exhaust stroke on the compression on the power stroke
n top dead center; therefore, the #1 piston is stroke

overspeeding of the failure of the engine to no effect of engine

engine shut down performance
 a seized piston an improperly fitted a closed or obstructed air
er. The probable cause is _______. bearing starting line valve
check the air filter for check for an exhaust check the exhaust
obstruction leak temperature
Number of power strokes Number of revolutions Number of power strokes
per revolution. per minute for both two- per minute.
stroke and four-stroke
engines.
overheating of the high exhaust sluggish engine
engine temperatures operation
an obstruction in an water accumulation in low starting air pressure
engine cylinder some engine cylinders
on the exhaust stroke on the compression at top dead center
n is ____________. stroke
read low for that location read high for that fluctuate due to the
due to the insulation location due to the hot conductance of carbon
effect of the deposits spots formed by the
deposits
opening the exhaust closing the fuel ports farthest from the cylinder
ports head
the pyrometer to the pyrometer to read the exhaust passage to
overheat and burn low become clogged
opening the exhaust closing the fuel ports farthest from the cylinder
ports head
stratified charge precombustion chamber turbulence chamber
combustion chamber
2 3 4

excessive scavenging air high coolant temperature insufficient fuel

pressure
eliminate carbon buildup improve piston cooling prevent air charge
turbulence
22.50‚ 33.75‚ 45.00‚
, four-stroke/cycle diesel engine is
an insufficient speed an overloaded engine clogged drain holes in
droop setting the oil control rings
improve piston cooling stratify the fuel charge prevent carbon buildup
_____________.
22.5‚ 45‚ 67.5‚
aft rotation must take place before #4L

proper fuel injection water in the fuel incomplete combustion

Marine Engineer Exam Questions
increase air turbulence prevent fuel afterburning prolong fuel afterburning
and improve fuel mixing when injection ends when injection ends
120‚ 180‚ 240‚

Black Blue Clear

Opposed Single acting None of the above

on the compression at bottom dead center on the intake stroke

stroke

water in the fuel high compression starting valve stuck open

temperature
increased clearance directional intake ports multi-orificed fuel nozzles
volume
minor thrust side top circumference bottom circumference

leaky fuel injector broken compression ring faulty oil ring

Ignition Power Combustion

fuel injection spray cylinder swept volume degree of penetration of

pattern the fuel oil droplets
Excessive diametrical Insufficient ring pressure Insufficient gap
tension clearance

One rotation of the One stroke of a piston. All of the above.

engine crankshaft.

inadequate fuel supply overload on one cylinder unequal load distribution

combined exhaust turbine blades are turbine is overheating

pyrometer is reading coated with carbon
normally

Stop the engine and Increase the #3 rack Stop the engine and
change out the #3 fuel setting and watch the adjust the #3 cylinder
nozzle. exhaust temperature. pump timing.

a high volatility low ignition delay a high cetane number

 Marine Engineer Exam Questions
The gear illustrated is a When operating astern, Both ahead and astern
reversing double the ahead pinion is clutch glands are driven
reduction gear. mechanically jogged out by the engine.
of mesh with bull gear.

the hardness of the to ensure the compound to ensure the compound

makeup feed water additions are adequate additions are adequate
for control of pH for controlling dissolved
oxygen

remain the same increase decrease

A high energy electric A gas pilot light An incandescent glow

spark plug
Operation of the Operation of an auxiliary The pumping action of
turbcharger at full load blower at low load the piston
improper adjustments contaminated fuel coated fuel lines
prevents flashing of regulates the eccentricity preheats feedwater
feedwater in the system of the thermostat tube entering the boiler
de-energize the high move the igniter away close the manual fuel
voltage ignition system from the normal firing valve with the burner
position firing
Steel brush Fine emery cloth or steel A section of the removed
wool compression ring
detect pilot flames that view the refractory avoid detecting the pilot
are incorrectly positioned directly opposite the flame
main burner
point of opening speed of opening lift from its seat
 Motor Knowledge
Choice D Illustration
protrusion

In the furnace not more

than 1 inch (2.54 cm)
below the lowest
permissible water level.
depth micrometer

screw thread outside

micrometer

screw thread outside

micrometer
76.19 RPM See illustration
number(s): MO-0088

bearing shells shim

dimensions
be oxidation resistant
and nontoxic

accumulator pressure

Clean the interior to

remove oil and foreign
matter.
fitted with caps or plugs
to prevent leakage

bypass system See illustration

number(s): MO-0007
114.29 RPM See illustration
number(s): MO-0088

disengage the astern

clutch
 Motor Knowledge
intake valves are less
affected to the corrosive
action of exhaust gases

open the burners'

electrical firing circuits
remain in the neutral
position

all of the above See illustration

number(s): MO-0092
lowering the speeder rod See illustration
number(s): MO-0092
Needle

located in the machinery

space

Mechanical lubricators

proportional plus reset See illustration

plus rate action number(s): MO-0047
damage to the pressure
compensator valve
exhaust valves See illustration
number(s): MO-0020
oil pressure under the See illustration
power piston will number(s): MO-0092
increase
accumulator spring
tension

change the stroke of the See illustration

load limit shutdown lever number(s): MO-0092

pony brake

Thrust bearing

have seal-welded
threads

all of the oil used by the

engine through a
centrifuge
Motor Knowledge
See illustration
number(s): MO-0117

See illustration
number(s): MO-0117

See illustration
number(s): MO-0125

See illustration
number(s): MO-0117
 Motor Knowledge
enable a total smaller
valve spring force to
keep the valve tight on
its seat

71.81 RPM See illustration

number(s): MO-0088

reduction gears

drop an equal amount of

any decrease in load

eliminate the need for See illustration

mechanical interlocks number(s): MO-0125
Thrust bearings

aluminum piping with

expansion loops
a lower grade of oil may
be used
prevent cavitation at the
pump outlet

thrust washer See illustration

number(s): MO-0122
open air damper

240‚ See illustration

number(s): MO-0038

stripped See illustration

 number(s): MO-0034
"B" to drive "A" when "B" See illustration
provides the power for number(s): MO-0034
rotation
SHP
damage to the bearings

Soft copper

Motor Knowledge
different type centrifuges
are required for the main
engine and reduction
gear lube systems
convection See illustration
number(s): MO-0003
without cooling the
cylinders or pistons
lube oil vapors in the
engine room
Compressed air and lube See illustration
oil number(s): MO-0125
"S" See illustration
number(s): MO-0122
Water may only be See illustration
removed from the bowl number(s): MO-0127
when the unit is secured
and the bowl hood is
removed.

have its back forced

against the seat under
load
low pressure fuel line See illustration
number(s): MO-0003
control linkage See illustration
number(s): MO-0003
P See illustration
number(s): MO-0003
Precision insert
oppose the effects of
piston induced squish
lock all safety interlock
switches closed
increase the rate of heat
transfer
reduce the water
alkalinity to
recommended readings
All of the above.

thrust

Motor Knowledge
injector nozzles
scrape oil and carbon
deposits off the cylinder
walls
exhaust gas See illustration
number(s): MO-0003
actuating oil supply See illustration
system number(s): MO-0125
left hand and right hand See illustration
number(s): MO-0122
The water drain valve is See illustration
used primarily when the number(s): MO-0127
bowl is flushed preceding
a shut down period. Its
opening is the result of a
pre-programmed
memory format.

automatic restart

lower than those at low

fire, but the generated
voltage will be higher
feedwater is too cold

halfway between bottom

and where shells meet
governor relief valve See illustration
number(s): MO-0041
Forced lube oil supply

losses to escaping
exhaust gases
difference between the
supply and return meter
readings
U See illustration
number(s): MO-0003
The triple nozzle See illustration
assembly responds to a number(s): MO-0098
low steam pressure
signal from a pyrostat.
two engine driven lube
oil pumps capable of
parallel operation

Motor Knowledge

See illustration
number(s): MO-0117

See illustration
number(s): MO-0059
See illustration
number(s): MO-0125

See illustration
number(s): MO-0122

Motor Knowledge
See illustration
number(s): MO-0118

See illustration
number(s): MO-0003

See illustration
number(s): MO-0125

See illustration
number(s): MO-0122

See illustration
number(s): MO-0047

See illustration
number(s): MO-0070

Motor Knowledge
See illustration
number(s): MO-0118

See illustration
number(s): MO-0125

See illustration
number(s): MO-0122

Motor Knowledge
orifice in the lube oil
header
furnace air pressure

excessive exhaust
temperatures
decrease in exhaust
manifold pressure
provide sufficient
blowdown

120 psig (823.77 kPa)

provide sufficient air in

the furnace to allow
ignition of the fuel
variable fuel return
pressure
pivoted segments

dropping pressure is half

of that through a single
filter unit
An orifice

allow for an increase in

water volume as the
engine warms up
The output of device "A", See illustration
under specific conditions, number(s): MO-0118
blocks the output signal
from the throttle, and in
practice becomes the
controlling signal.
50.00 psi See illustration
number(s): MO-0004

Motor Knowledge
See illustration
number(s): MO-0125
See illustration
number(s): MO-0126

See illustration
number(s): MO-0001

See illustration
number(s): MO-0111

Motor Knowledge
See illustration
number(s): MO-0059

See illustration
number(s): MO-0118

See illustration
number(s): MO-0126

See illustration
number(s): MO-0119

See illustration
number(s): MO-0025
 Motor Knowledge
Assuming the load See illustration
indicator reads 90% and number(s): MO-0126
the engine speed is at
80% the engine can be
operated until
maintenance
requirements become
apparent.
at 70 percent of the
ahead rpm of average
continous sea speed
fewer soot deposits

incorrect primary air

setting
column See illustration
number(s): MO-0002
the lessened chance of
fuel leaks into the engine
sump
Inspect for oil and water
leaks.
full fuel pressure at the
nozzle
adjust the photocell to
observe the new flame
position
early part of the
downstroke
Bottom blowing

heat damage to the

atomizer
decreased boiler
efficiency
support bearings
Lubrication telescopes See illustration
number(s): MO-0003
Hydraulic governing

all of the above

expansion tank
atmospheric vent
Motor Knowledge
See illustration
number(s): MO-0119

See illustration
number(s): MO-0126

See illustration
number(s): MO-0119

See illustration
number(s): MO-0122
Motor Knowledge

See illustration
number(s): MO-0059

See illustration
number(s): MO-0047

See illustration
number(s): MO-0003

See illustration
number(s): MO-0120
See illustration
number(s): MO-0122
 Motor Knowledge
subcooling internal
components

All of the above

dissolved CO2

overheating of the
pressure parts
provides inert gas
generation in crankcase
Distributor injection

two-stroke/cycle diesel
engines require more
complicated lubrication
piping

sacrificial zincs

flywheel and indicator See illustration

number(s): MO-0120
staying open for a longer
period of time
open the exhaust valves See illustration
and operate the unit number(s): MO-0122
injectors
crankcase ventilation
fans
increase the rate of heat
transfer to the waterside

adding a sulfite chloride

scavenger
Improves cold weather
starting.

variable cam lift

injection lubrication

provide a protective
coating on heat
exchanger surfaces

Motor Knowledge

See illustration
number(s): MO-0110
See illustration
number(s): MO-0007

Motor Knowledge
See illustration
number(s): MO-0120
See illustration
number(s): MO-0122
See illustration
number(s): MO-0007

See illustration
number(s): MO-0004

Motor Knowledge
12 See illustration
number(s): MO-0060
transmit the axial thrust See illustration
of the propeller to the number(s): MO-0120
foundation of the vessel
via the bed plate

extrusion tube assembly See illustration

number(s): MO-0122
Explosion relief valves

yellow slime or fibrous

sludge

all of the above

burner failure
frequent bottom blows

one-fourth times
crankshaft speed in a
four-stroke cycle diesel
engine
their position in the
lubrication system
overboard

The shut off valves on See illustration

the boiler drum must be number(s): MO-0093
locked, or sealed open.

cause an explosion in
the boiler furnace
maintain steam pressure
10 psig below normal
boiler load
all of the above

remove floating
impurities from the oiler
water surface

Motor Knowledge
orifice plate marked 32

variable depending on See illustration

the ratio between engine number(s): MO-0003
rpm and propeller shaft
rpm
bleed air from the pump See illustration
and fuel lines number(s): MO-0060

adjustable to meet
lubrication requirements
water level in the
expansion tank
The lube oil enters See illustration
through the supply pipes number(s): MO-0120
shown and eventually
drains to the main engine
sump.

Auxiliary blower failure

cylinder head locking See illustration

device number(s): MO-0122
duplex double acting
type
Brightening of copper
bearing metals
direct action of the main
piston moving down
2400 RPM

It transmits the control See illustration

rack setting to the number(s): MO-0061
plunger.
periods of standby

heat exchanger

rotational motion
imparted by the
tangential slots being
greater in the return flow
atomizer
overspeeding and
running away

Motor Knowledge
The bearing assembly is See illustration
specifically designed to number(s): MO-0120
allow for rotation,
permitting the transmittal
of axial forces across a
greater surface area and
minimizing loading
densities.
"G" See illustration
number(s): MO-0122
2.0 bar

Increased corrosion of
tank plating
a speed independent of
the crankshaft
To set up the fuel rack
calibration in cubic
millimeters.
drilled passage through
the camshaft
the operation of the
thermostatic valve

area of the tangential

slots
coolant temperature is
too low

burner circuit and See illustration

feedwater regulator number(s): MO-0047
month

provide a trial for ignition

period of not more than
90 seconds

exhaust gas pressure

a speed independent of
the crankshaft
spill port See illustration
number(s): MO-0060
throw-off method

Motor Knowledge
See illustration
number(s): MO-0120

See illustration
number(s): MO-0122

See illustration
number(s): MO-0060

See illustration
number(s): MO-0047

See illustration
number(s): MO-0093
Motor Knowledge
See illustration
number(s): MO-0122

See illustration
number(s): MO-0121

See illustration
number(s): MO-0122
 Motor Knowledge
broken valve springs

combustion control
system failure
frequent bottom blows

a high pump suction

head
To ensure that the valve
will not be seized shut
when hot.
ensure a fuel leakoff
between the plunger and
barrel which provides
lubrication for relative
movement
prevented from rotating
during engine operation
increase fuel
consumption per
horsepower hour

It is possible for the shaft See illustration

to move axially 2.3 mm number(s): MO-0121
during astern operation
and relates to an excess
movement of 1.3 mm,
0.3 mm beyond the
maximum worn play.
broken high tension lead

all of the above

Inspect and clean burner

oil solenoid valves
High fuel oil temperature

control fuel pressure

delivered to the
combustion chamber
flow from a centrifugal or
banjo oiler

Motor Knowledge

See illustration
number(s): MO-0071

See illustration
number(s): MO-0005

See illustration
number(s): MO-0121

See illustration
number(s): MO-0122
See illustration
number(s): MO-0003
See illustration
number(s): MO-0111

Motor Knowledge
minimize moisture
condensation in the
boiler gas passages at
low loads
52.63 RPM See illustration
number(s): MO-0088

close with hydraulic

action

burner flame is
extinguished
jacket water temperature
is more easily controlled

improve engine fuel

consumption at any load
scavenging

bromide or hygroscopic
sulfite
90 seconds

scaling at all exhaust

temperatures
frequent bottom blows

engine oil filter is See illustration

outboard of the electric number(s): MO-0006
starter
cam action See illustration
 number(s): MO-0060
The damper in the
uptakes is moved to the
wide open position for a
given number of seconds
and then moved to the
low firing rate position.

high fuel oil temperature

insufficient purging
before lighting off
volume of air admitted to
the cylinder

Motor Knowledge
See illustration
number(s): MO-0121

See illustration
number(s): MO-0122

See illustration
number(s): MO-0007
 Motor Knowledge
increase turbocharger
efficiency
increase jacket water
temperature for easier
starting in cold weather
0.80 mm See illustration
number(s): MO-0121

Piston blower

"V" See illustration

number(s): MO-0122
one crankshaft except in
cases where an opposed
piston design is required

all of the above

flame failure
1500 RPM
crankcase exhaust fan See illustration
number(s): MO-0003
automatically regulates
the quantity of oil and air
flow to the burner
piping exhaust gases
across the radiator front

faulty photocell detector

steam for warming

engines
Scale and sediment will
form on the gasket.

steam pressure

automatic steam
atomizer assembly

Low fuel oil viscosity

being maintained.

flywheels

Motor Knowledge
See illustration
number(s): MO-0059

See illustration
number(s): MO-0122

Motor Knowledge
all of the above

equipped with fuel

nozzles having variable
orifices
all of the above

absorb the high pressure See illustration

pulses developed during number(s): MO-0062
the fuel injection process
29.6 million BTU's per
hour

has a higher chloride

content
125 psi

electrode sensing water

level

Steel fins are installed on

the generating tube
surfaces to increase the
effective surface area.
300 psig

water pressure is not

sensed

operate most effectively

when it has zero
blowdown
Z See illustration
number(s): MO-0003
design of the combustion
chamber

Motor Knowledge
See illustration
number(s): MO-0123
MO-0124
See illustration
number(s): MO-0122

See illustration
number(s): MO-0018

Motor Knowledge
See illustration
number(s): MO-0059

See illustration
number(s): MO-0123 A
& B MO-0124 A & B

See illustration
number(s): MO-0122
 Motor Knowledge
Faulty flame scanner

amount of time the valve

remains open
Multi-pintle

batch system See illustration

number(s): MO-0056
neither I nor II

Moisture is removed
from generated steam in
a radiant superheater.

all of the above

automatic reset pressure

limiter
all of the above

thermostat tube

brickwork failure

Scavenge pressure,
compression ratio, and
exhaust pressure
fuel detonation in the
cylinders
limit the lube oil outlet
pressure

excessive acidity

Valves "27A", "27C", See illustration

"30B", "27F" and "27G" number(s): MO-123-
have each opened A&B MO-124-A&B
corresponding to the
required magnitude of
the ahead direction.
"O" See illustration
number(s): MO-0122
 Motor Knowledge
The required equipment
for a crosshead type
engine is totally
dependent upon
manufacturers ability to
placate market
demands.

rapid fuel viscosity

increase

thermistor

Gas pilot light

convex contour See illustration

number(s): MO-0045
Water flows through the
tubes.
Unevaporated feedwater
drains to the bilge.

neutral condition of water

fuel oil circulation

through passages in the
holder
The position of the See illustration
safeguard permits or number(s): MO-0124
prevents the actuation of
the shut down
servomotor, ultimately
affecting the output of
the governor.

frame stiffener See illustration

number(s): MO-0122
Scavenging spaces in
open connection to the
cylinders.
an excessively long
purge cycle
Synchromesh coupling See illustration
number(s): MO-0085

Motor Knowledge

See illustration
number(s): MO-0062

See illustration
number(s): MO-0089

See illustration
number(s): MO-0111

See illustration
number(s): MO-0012

See illustration
number(s): MO-0012
Motor Knowledge
See illustration
number(s): MO-0123 A
& B MO-0124 A & B

See illustration
number(s): MO-0085

See illustration
number(s): MO-0122

See illustration
number(s): MO-0100

See illustration
number(s): MO-0057
See illustration
number(s): MO-0089
See illustration
number(s): MO-0012

Motor Knowledge

See illustration
number(s): MO-0012

See illustration
number(s): MO-0012
See illustration
number(s): MO-0012

Motor Knowledge
R See illustration
number(s): MO-0012

Chemically analyze See illustration

contents of power pellet. number(s): MO-0079

Device "4.07" provides a See illustration

variable fulcrum, number(s): MO-0123
permitting proper initial MO-0124
adjustment of the
components directly
attached.

scavenging air inlet See illustration

number(s): MO-0122
25 percent

D See illustration
 number(s): MO-0096

newly installed friction

blocks
sighting device

3L/3R See illustration

number(s): MO-0004
variable beginning and See illustration
constant ending number(s): MO-0063

"V5," "V10," "V15," and See illustration

"V16" are all open number(s): MO-0024
changing spring
compression to oppose
the bellows
reversing servomotor See illustration
number(s): MO-123
A&B MO-124 A&B
exhaust valve spring See illustration
number(s): MO-0122

Motor Knowledge

See illustration
number(s): MO-0090
See illustration
number(s): MO-0024
See illustration
number(s): MO-0091
See illustration
number(s): MO-0047

See illustration
number(s): MO-0095

Motor Knowledge

See illustration
number(s): MO-123
A&B MO-124 A&B
See illustration
number(s): MO-0122

See illustration
number(s): MO-0022

See illustration
number(s): MO-0061

Motor Knowledge
See illustration
number(s): MO-0012

See illustration
number(s): MO-0012
See illustration
number(s): MO-0124-A

See illustration
number(s): MO-0122

Motor Knowledge
See illustration
number(s): MO-0012
See illustration
number(s): MO-0100

See illustration
number(s): MO-0047

See illustration
number(s): MO-0012

Motor Knowledge
See illustration
number(s): MO-0123
MO-124
See illustration
number(s): MO-0122

See illustration
number(s): MO-0061

See illustration
number(s): MO-0012

See illustration
number(s): MO-0085
Motor Knowledge
See illustration
number(s): MO-0012
See illustration
number(s): MO-0010

See illustration
number(s): MO-0085

See illustration
number(s): MO-0012

See illustration
number(s): MO-0012
Motor Knowledge

See illustration
number(s): MO-0012

See illustration
number(s): MO-0003

See illustration
number(s): MO-0127

See illustration
number(s): MO-0012
See illustration
number(s): MO-0100
See illustration
number(s): MO-0010

Motor Knowledge
varying the clearance
between the injector cam
and the injector rocker
arm
top off the expansion
tank
directly maintain the See illustration
position of the oil number(s): MO-0012
emulsion interface
prevent flame
impingement on the
generating tube bank

4.00%

thick sludge separated See illustration

from the clean oil number(s): MO-0012

Mechanical reduction
gearing is required.

sensitivity increase
avoid warping of the See illustration
disks in the bowl number(s): MO-0012

Suitable atomization rate

See illustration
number(s): MO-0127

See illustration
number(s): MO-0012

Motor Knowledge

See illustration
number(s): MO-0012

See illustration
number(s): MO-0063

See illustration
number(s): MO-0088

See illustration
number(s): MO-0012

Motor Knowledge
Excessive leakage from
jacket water pump seals.

none of the above

gravity disk See illustration

number(s): MO-0012
Regulating valve V4 is See illustration
closed. number(s): MO-0127

treating the boiler water

with chemical oxygen
scavengers
Hydraulic

governor overcontrol
piston guides
helical groove on the
plunger
minimal friction losses

incomplete combustion
in that cylinder
sliding bowl bottom seal See illustration
ring is defective number(s): MO-0012

decreasing the See illustration

overspeed trip setting number(s): MO-0094
automatic burner cycling
controls steam volume
and quality

stabilize engine speed at

the new governor setting

the closing water See illustration

number(s): MO-0012
The wrist pin is free See illustration
floating. number(s): MO-0011
The injection nozzle will
overheat and carbonize.

Motor Knowledge

See illustration
number(s): MO-0127

See illustration
number(s): MO-0109

See illustration
number(s): MO-0012
See illustration
number(s): MO-0012

See illustration
number(s): MO-0101

Motor Knowledge

See illustration
number(s): MO-0003
See illustration
number(s): MO-0127

See illustration
number(s): MO-0012

See illustration
number(s): MO-0012
See illustration
number(s): MO-0064

Motor Knowledge

See illustration
number(s): MO-0027

See illustration
number(s): MO-0127

See illustration
number(s): MO-0047
See illustration
number(s): MO-0096

See illustration
number(s): MO-0088

See illustration
number(s): MO-0011

Motor Knowledge
fuel oil tars

the crown being tapered

and smaller than the skirt

nozzle orifice size

Lube oil

close, and the coolant

temperature will
decrease
The injection line is to be
of seamed drawn pipe
and fittings are to be
extra heavy.

Adjust the PAS monitor See illustration

and reset the number(s): MO-0127
proportional band
controller.
water wall tubes

inadequate lubrication

Motor Knowledge
See illustration
number(s): MO-0092
Motor Knowledge

See illustration
number(s): MO-0012
See illustration
number(s): MO-0012

See illustration
number(s): MO-0127
Motor Knowledge

See illustration
number(s): MO-0011

See illustration
number(s): MO-0127
Motor Knowledge
See illustration
number(s): MO-0007

See illustration
number(s): MO-0061

See illustration
number(s): MO-0092
See illustration
number(s): MO-0031

See illustration
number(s): MO-0011

See illustration
number(s): MO-0086
See illustration
number(s): MO-0092

See illustration
number(s): MO-0085

See illustration
number(s): MO-0035

Motor Knowledge
See illustration
number(s): MO-0012

See illustration
number(s): MO-0127
See illustration
number(s): MO-0011
See illustration
number(s): MO-0005

Motor Knowledge

See illustration
number(s): MO-0127

See illustration
number(s): MO-0094
See illustration
number(s): MO-0087

See illustration
number(s): MO-0086

Motor Knowledge
fuel oil pump

more rapid will be the

rise in combustion
pressure
double acting engine

Free rolling

drain cooling water

system components

the emulsification of See illustration

water and fuel within the number(s): MO-0127
parting chamber
listening to the engine

Flyweights

Increasing the
compression ratio.
clutches are engaged by See illustration
a reduction in control air number(s): MO-0085
pressure

thrust bearing and the

Motor Knowledge

See illustration
number(s): MO-0011
See illustration
number(s): MO-0127

Motor Knowledge
the opening of the two-
stroke/cycle diesel
exhaust ports or valves
occurs much later than in
four-stroke/cycle diesel
engines
reduce ignition lag

4 See illustration
 number(s): MO-0086
oil rings

firing pressure

low bearing oil pressure

an incorrectly set cooling

system temperature
control
Tapered roller See illustration
number(s): MO-0086
engine speed droop

excessive compression
pressure
infrared analysis

contribute to effective
cylinder scavenging
thrust bearing

provide cooling for the See illustration

control ring groove number(s): MO-0013

scavenge and purge

process is incomplete

excessively hot lube oil

Restricted water
passages in the engine.
Suitable strainers are to
be fitted between the
circulating pumps and
heat exchangers when
sea water is used for
direct cooling.

Motor Knowledge
None of the above are See illustration
correct. number(s): MO-0127
ability to maintain
constant speed
regardless of engine load

An increase in
compression ratio will
increase ignition delay.

swept volume charging

an increase in cylinder
blow-by
transferred to escaping
exhaust gases
duration of the ignition
delay period

dry

horizontal acting engine

neither I or II are correct

a loose bed plate bolt

reduce the load on the

engine

Exhaust and
compression
cylinder scavenging

Piece #21 See illustration

number(s): MO-0094

Motor Knowledge
See illustration
number(s): MO-0127

See illustration
number(s): MO-0075
Motor Knowledge

See illustration
number(s): MO-0127

See illustration
number(s): MO-0085
Motor Knowledge

See illustration
number(s): MO-0127

See illustration
number(s): MO-0094
See illustration
number(s): MO-0127

Motor Knowledge
hunting

To rotate the crankshaft.

dirty fuel will clog the

intake air filter

cooled to increase
viscosity
decrease the speed
droop
Lube oil sump level

the ignition of unburned

fuel and air in the
crankcase
D See illustration
number(s): MO-0068

carbon buildup on the

injector tips
Relay motion

Examine the exhaust See illustration

valves for evidence of number(s): MO-0005
burning.

produce an even glaze

on the cylinder
compression and power

allow for proper

lubrication of the friction
clutch shoes
An increase in trapped
deposits of scale and
dirt.
so installed as to make
the drain connections
effective under extreme
conditions of trim

Motor Knowledge

See illustration
number(s): MO-0127

See illustration
number(s): MO-0057
See illustration
number(s): MO-0092

Motor Knowledge

See illustration
number(s): MO-0057

See illustration
number(s): MO-0127

See illustration
number(s): MO-0127

See illustration
number(s): MO-0085

See illustration
number(s): MO-0068

Motor Knowledge
See illustration
number(s): MO-0092

Motor Knowledge

See illustration
number(s): MO-0076
See illustration
number(s): MO-0127

See illustration
number(s): MO-0127

Motor Knowledge
See illustration
number(s): MO-0092

See illustration
number(s): MO-0096

See illustration
number(s): MO-0127
 Motor Knowledge
should be completed
shortly after passing top
dead center

side

improves cold weather

starting

A mechanical defect in a
working part

all of the above

exhaust system is
partially restricted
Precombustion chamber

exhaust damper

135246 See illustration

number(s): MO-0038
D See illustration
number(s): MO-0102

zero air pressure in the

air starting system

low cooling water

temperature
to promote more even
ring wear

loss of power

burning fuel with a lower

sulphur content
952.7 psig (6568.6 kPa)

g See illustration
number(s): MO-0035
load limit governor
Motor Knowledge

See illustration
number(s): MO-0074

See illustration
number(s): MO-0014
 Motor Knowledge
remove most See illustration
contaminants present in number(s): MO-0115
the air supply

lower lock ring See illustration

number(s): MO-0112
All of the above are
correct.
earlier and closing later

the turbocharger is
fouled
IV See illustration
number(s): MO-0037
contain a smaller portion
of the total clearance
volume
all of the above

The materials used in the

construction of the
starting air mains will
contain any explosion.

auto restart switches See illustration

number(s): MO-0127
Provide positive rotation See illustration
of the exhaust valves. number(s): MO-0019

two piston strokes in a

two-stroke/cycle engine

all of the above

Both 17A and 17B need See illustration

to be reset to decrease number(s): MO-0114
the critical speed range,
although this procedure
will increase the
operating range of the
engine.
1500 ft/min See illustration
number(s): MO-0004

Motor Knowledge

See illustration
number(s): MO-0038
See illustration
number(s): MO-0108

Motor Knowledge
See illustration
number(s): MO-0013

See illustration
number(s): MO-0007

See illustration
number(s): MO-0068
 Motor Knowledge
in way of the control
valve of each cylinder for
direct reversing engines
having a main starting
manifold
be initiated by the water See illustration
transducer or vibration number(s): MO-0127
switch
1800 ft/min

fail to open when the

valves are warm
oil rings are located near
the bottom of the piston
skirt
strong detergent

diluted with water

volumetric efficiency

utilize higher injection

pressures
decrease allowing the See illustration
butterfly valve to turn number(s): MO-0103
counterclockwise
valve operating
mechanism
at bottom dead center

overloading of one
cylinder
Pressure increases and
temperature decreases
make it more flexible for
scraping cylinder
surfaces
erosion of the valves

settled

556.52 RPM See illustration

number(s): MO-0088

Motor Knowledge
complete combustion

increase tension on See illustration

lockwire by adjusting number(s): MO-0101
pieces #31, #32 and #35
a mechanical/electrical See illustration
device with a variable dc number(s): MO-0127
output
excessive lube oil
pressure
thermal efficiency will
increase
two piston strokes in a
four-stroke/cycle engine

reduce the probability of See illustration

ring fracture number(s): MO-0015
isolate each cylinder and
inspect the injector

all of the above

the end of ignition See illustration
number(s): MO-0108
in any position

the piston rod being See illustration

forced to move to the number(s): MO-0103
right

centrifugal pump

Mechanical condition of
the turbocharger
Number of pistons

high lube oil pressure

all of the above

All of the above.

A minor increase in flash

point.

Motor Knowledge
See illustration
number(s): MO-0127

See illustration
number(s): MO-0104
Motor Knowledge
See illustration
number(s): MO-0044

See illustration
number(s): MO-0127

See illustration
number(s): MO-0101

Motor Knowledge
See illustration
number(s): MO-0127

Motor Knowledge
See illustration
number(s): MO-0111
See illustration
number(s): MO-0112
See illustration
number(s): MO-0111
See illustration
number(s): MO-0110
See illustration
number(s): MO-0121

See illustration
number(s): MO-0110
Motor Knowledge

See illustration
number(s): MO-0111

See illustration
number(s): MO-0111

See illustration
number(s): MO-0115
See illustration
number(s): MO-0113

See illustration
number(s): MO-0112
See illustration
number(s): MO-0112

See illustration
number(s): MO-0110

See illustration
number(s): MO-0112
See illustration
number(s): MO-0110

See illustration
number(s): MO-0110
 Motor Knowledge
The larger sized See illustration
regulating rings are number(s): MO-0113
designed to be used with
oils of lower specific
gravities.

first major insert See illustration

number(s): MO-0112
The vapors produced in See illustration
section "G" are number(s): MO-0110
condensed and the non-
condensable gases are
removed.
Gas pressure acting
against the back of the
ring
all of the above

corrosive by-products are

usually formed
feed water inlet See illustration
number(s): MO-0110
minimal while the sliding See illustration
piston is in the closed number(s): MO-0112
position

Every six months for four

hours

Scale accumulates at See illustration

position "E". number(s): MO-0110

0.902 kg/dm3 See illustration

number(s): MO-0113

Valves "C", "J", "K", "L", See illustration

"M" open, valves "A", number(s): MO-0111
"B", "D", and "H" closed.
brine water outlet See illustration
 number(s): MO-0110
combustion gas pressure
acting behind the ring

disappear due to fuel oil

abrasion

All of the above

Motor Knowledge

See illustration
number(s): MO-0113

See illustration
number(s): MO-0110
See illustration
number(s): MO-0110

See illustration
number(s): MO-0112
See illustration
number(s): MO-0110

See illustration
number(s): MO-0013

See illustration
number(s): MO-0113
See illustration
number(s): MO-0110

See illustration
number(s): MO-0110

See illustration
number(s): MO-0112

See illustration
number(s): MO-0115

Motor Knowledge
See illustration
number(s): MO-0110

See illustration
number(s): MO-0116

See illustration
number(s): MO-0110

See illustration
number(s): MO-0110
See illustration
number(s): MO-0111

See illustration
number(s): MO-0116
See illustration
number(s): MO-0110

See illustration
number(s): MO-0017

See illustration
number(s): MO-0065

See illustration
number(s): MO-0115

Motor Knowledge
See illustration
number(s): MO-0110

See illustration
number(s): MO-0112
See illustration
number(s): MO-0112

See illustration
number(s): MO-0110

See illustration
number(s): MO-0115
See illustration
number(s): MO-0115

See illustration
number(s): MO-0065

See illustration
number(s): MO-0111

See illustration
number(s): MO-0110

See illustration
number(s): MO-0111

See illustration
number(s): MO-0111

Motor Knowledge
See illustration
number(s): MO-0111

See illustration
number(s): MO-0110

See illustration
number(s): MO-0112
See illustration
number(s): MO-0111

See illustration
number(s): MO-0112

See illustration
number(s): MO-0111

See illustration
number(s): MO-0110

See illustration
number(s): MO-0112

See illustration
number(s): MO-0111
See illustration
number(s): MO-0114

Motor Knowledge
See illustration
number(s): MO-0112
See illustration
number(s): MO-0110

See illustration
number(s): MO-0111

See illustration
number(s): MO-0112
See illustration
number(s): MO-0111

See illustration
number(s): MO-0111

See illustration
number(s): MO-0112
See illustration
number(s): MO-0116

See illustration
number(s): MO-0019

Motor Knowledge
See illustration
number(s): MO-0111
See illustration
number(s): MO-0112
See illustration
number(s): MO-0111
See illustration
number(s): MO-0112

See illustration
number(s): MO-0112
See illustration
number(s): MO-0112
See illustration
number(s): MO-0112

See illustration
number(s): MO-0114

See illustration
number(s): MO-0111

See illustration
number(s): MO-0112
Motor Knowledge
See illustration
number(s): MO-0115

See illustration
number(s): MO-0111

See illustration
number(s): MO-0112
See illustration
number(s): MO-0112
See illustration
number(s): MO-0111

See illustration
number(s): MO-0111

See illustration
number(s): MO-0112
See illustration
number(s): MO-0111

See illustration
number(s): MO-0111
See illustration
number(s): MO-0112
See illustration
number(s): MO-0114
Motor Knowledge
See illustration
number(s): MO-0111

See illustration
number(s): MO-0114

See illustration
number(s): MO-0112

See illustration
number(s): MO-0112

See illustration
number(s): MO-0112
Motor Knowledge

See illustration
number(s): MO-0051
Motor Knowledge
See illustration
number(s): MO-0051

See illustration
number(s): MO-0020

See illustration
number(s): MO-0013

See illustration
number(s): MO-0044

See illustration
number(s): MO-0028

See illustration
number(s): MO-0022
See illustration
number(s): MO-0122

Motor Knowledge
Particles of solid matter The strainer discs, See illustration
larger than the distances spacers, and scraper number(s): MO-0057
between the discs flow blades are magnetic to
up through the inner prevent small metal
space. particles from damaging
the reduction gear.
both I and II neither I nor II

both I and II neither I nor II

both I and II neither I nor II

both I and II neither I nor II

7,182 kW 14,363 kW

integral with a removable integral with a non- See illustration

sleeve removable sleeve number(s): MO-0007
low compression high exhaust
pressure temperature
Loose valve tappets High exhaust back
pressure
III IV See illustration
number(s): MO-0037
C D See illustration
number(s): MO-0029

act as a multi-pressure quickly shut off fuel flow See illustration

relief valve at the end of fuel number(s): MO-0070
injection

BHP SHP
695.65 RPM 97.83 RPM See illustration
number(s): MO-0088

centerline of the cylinder centerline of the king pin

both I and II neither I nor II

4,044 kW 8,088 kW

Motor Knowledge

See illustration
number(s): MO-0088

See illustration
number(s): MO-0029

See illustration
number(s): MO-0003

Motor Knowledge
See illustration
number(s): MO-0122
See illustration
number(s): MO-0021
See illustration
number(s): MO-0088

See illustration
number(s): MO-0007

See illustration
number(s): MO-0109

Motor Knowledge
675.00 RPM See illustration
number(s): MO-0088

neither I or II

jacket water pressure

must always be less than
the sea water pressure
sealed-jacket liner See illustration
number(s): MO-0007
mechanical knock in
each cylinder
the piston rings are
excessively worn
All of the above.

0.80 mm See illustration

number(s): MO-0121

defective turbocharger

All of the above

15.0 kg/cm

determine the need for

batch filtration
excessively high See illustration
combustion pressure number(s): MO-0041
the number of sleeve
segments engaged with
the rack
mechanical knock in
each cylinder
corrosive by-products are
usually formed
reduced blow-by

68.75 RPM See illustration

number(s): MO-0088

individual Bosch fuel See illustration

pumps number(s): MO-0020

Motor Knowledge
the barrel and plunger
must be lapped and
blued.
High exhaust pressure

9.0 m/sec

small diesel engines

utilizing electric starting
equipment
length of the piston
stroke
black or gray exhaust
smoke
increase in clearance See illustration
between the mating number(s): MO-0082
lobes
All of the above.

positioning a servomotor
piston attached to the
fuel controls

Engine "B" will operate at See illustration

a higher RPM than number(s): MO-0109
engine "A".

100.00 RPM See illustration

number(s): MO-0088

114.29 RPM See illustration

number(s): MO-0088

78.95 RPM See illustration

number(s): MO-0088

933.33 RPM See illustration

number(s): MO-0088

decrease compression
ratio for easier starting

fuel knock in each

cylinder
contaminated with
sludge
Motor Knowledge

See illustration
number(s): MO-0088

See illustration
number(s): MO-0088

See illustration
number(s): MO-0088

See illustration
number(s): MO-0028

See illustration
number(s): MO-0125
See illustration
number(s): MO-0029

See illustration
number(s): MO-0122
Motor Knowledge

See illustration
number(s): MO-0111
See illustration
number(s): MO-0029

Motor Knowledge
See illustration
number(s): MO-0045

See illustration
number(s): MO-0088

See illustration
number(s): MO-0015
See illustration
number(s): MO-0042

See illustration
number(s): MO-0016
See illustration
number(s): MO-0097
See illustration
number(s): MO-0066

See illustration
number(s): MO-0095

Motor Knowledge
reflective type explosion See illustration
meter number(s): MO-0008
reflective type explosion See illustration
meter number(s): MO-0008
level type mist detector, See illustration
designed for small high number(s): MO-0009
speed trunk piston
engines
kinetic energy imparted See illustration
through centripital force number(s): MO-0009
movement of rod #581 See illustration
number(s): MO-0106
180°-190° See illustration
number(s): MO-0013

crankcase pressure See illustration

number(s): MO-0005
The engine will stop.

lower lube oil pressures

Turbine-driven
centrifugal blower
prevent the backflow of See illustration
oil and combustion number(s): MO-0050
gases
all of the above
 4 6 See illustration
number(s): MO-0122
without cooling the
cylinders or pistons
engine speeds decrease

76.19 RPM See illustration

number(s): MO-0088

flexible metallic seal ring

using a fuel with too low

of a cetane number
all of the above

Motor Knowledge

See illustration
number(s): MO-0008

See illustration
number(s): MO-0088

See illustration
number(s): MO-0088

See illustration
number(s): MO-0088

See illustration
number(s): MO-0088
See illustration
number(s): MO-0050

See illustration
number(s): MO-0066

See illustration
number(s): MO-0066

Motor Knowledge

See illustration
number(s): MO-0051
See illustration
number(s): MO-0016
See illustration
number(s): MO-0042

See illustration
number(s): MO-0066

Motor Knowledge
neither I nor II

F See illustration
number(s): MO-0003
crankcase exhaust fan See illustration
number(s): MO-0003
lube oil temperature at
the cooler outlet
increase until the See illustration
overspeed trip actuates number(s): MO-0095
increase until the See illustration
overspeed trip actuated number(s): MO-0094

it fits more loosely due to

a decrease in heat
transfer through the
composite wall
ensuring good metallic
contact between nozzles
and cylinder heads
becoming lodged under
the intake valves

Variable pressure

neither I nor II

tachometer

pyrometer

calorimeter

pyrometer

prevent slag
accumulation on the
corbels

Motor Knowledge
See illustration
number(s): MO-0013
See illustration
number(s): MO-0023

See illustration
number(s): MO-0110

Motor Knowledge
See illustration
number(s): MO-0013

See illustration
number(s): MO-0003
Motor Knowledge
Motor Knowledge

See illustration
number(s): MO-0035

See illustration
number(s): MO-0080

See illustration
number(s): MO-0025

See illustration
number(s): MO-0026
Motor Knowledge

See illustration
number(s): MO-0003

See illustration
number(s): MO-0081

See illustration
number(s): MO-0003
Motor Knowledge
See illustration
number(s): MO-0082

Motor Knowledge
Motor Knowledge
See illustration
number(s): MO-0082

Motor Knowledge
Motor Knowledge
Motor Knowledge
See illustration
number(s): MO-0058

See illustration
number(s): MO-0082

See illustration
number(s): MO-0082

See illustration
number(s): MO-0082

Motor Knowledge
See illustration
number(s): MO-0082
 Motor Knowledge
All of the above.

insufficient cylinder
cooling
Decrease the amount of
exhaust and intake valve
overlap.
is in good condition

surface of gradually
deepening grooves

Retard the intake and

exhaust valve closing
period.

overload operation

The intake valve closing

is retarded and the
exhaust valve closing is
advanced.
passage of hot gases

A decrease in the air

temperature differential
between the cooler inlet
and outlet.
raise the piston
temperature
Clogged air intake filters.

All of the above.

deformed piston skirts

Clogged air intake filters

a three-wing hone
 Motor Knowledge
rings with increased back
clearance are provided

Heating the starting

battery.

Exhaust temperatures
will be low.

hydrogen

Assume that there is no

damage to the
crankshaft.
The end gaps should be
staggered on either side
of a piston in a two-
stroke/cycle engine,
while staggering is not
necessary in a four-
stroke/cycle engine.
Electrical power to the
heater must be secured
before the cooling
system is drained.
The vanadium content
will accelerate cylinder
wear.

increase crank case

scavenge air to remove
unburned gases
increasing the
dimensions of the ring
land grooves

12 cranking periods of 5
seconds each

All of the above.

high heating value and
low sulphur content
explosion covers should
be opened slightly to
provide extra ventilation

Motor Knowledge

See illustration
number(s): MO-0105
See illustration
number(s): MO-0105

Motor Knowledge
Motor Knowledge

See illustration
number(s): MO-0027
See illustration
number(s): MO-0028

See illustration
number(s): MO-0044
Motor Knowledge
Motor Knowledge
See illustration
number(s): MO-0046

See illustration
number(s): MO-0045

See illustration
number(s): MO-0045

Motor Knowledge
See illustration
number(s): MO-0039

See illustration
number(s): MO-0046

See illustration
number(s): MO-0003

See illustration
number(s): MO-0046

See illustration
number(s): MO-0046

Motor Knowledge
See illustration
number(s): MO-0058

See illustration
number(s): MO-0027
See illustration
number(s): MO-0107

See illustration
number(s): MO-0003

See illustration
number(s): MO-0049

Motor Knowledge
See illustration
number(s): MO-0030
See illustration
number(s): MO-0049

See illustration
number(s): MO-0058
Motor Knowledge
See illustration
number(s): MO-0019

See illustration
number(s): MO-0040

See illustration
number(s): MO-0019

See illustration
number(s): MO-0013

See illustration
number(s): MO-0005

See illustration
number(s): MO-0013
Motor Knowledge

See illustration
number(s): MO-0005

See illustration
number(s): MO-0007

See illustration
number(s): MO-0044

See illustration
number(s): MO-0044
Motor Knowledge

See illustration
number(s): MO-0051
See illustration
number(s): MO-0011
 Motor Knowledge
U See illustration
number(s): MO-0003
direct current

help retain the heat of

compression to prevent
combustion knock

Light brown smoke will

emanate from the engine
exhaust.
of equal importance in a
two-stroke/cycle diesel
engine as in a four-
stroke/cycle diesel
engine
higher compression
pressures

at the main engine fuel See illustration

oil header number(s): MO-0058
excessive ring face wear

reduce tension on valve

springs

will carry a 100%

overload for a brief
period
the same size as the
crown of an aluminum
piston
excessive crankshaft end
play
scavenging air

12 See illustration
number(s): MO-0052
connecting rod cap See illustration
number(s): MO-0040
all of the above

exhausting combustion
gas
four times engine speed

Motor Knowledge
See illustration
number(s): MO-0040

See illustration
number(s): MO-0053

See illustration
number(s): MO-0046
See illustration
number(s): MO-0045

Motor Knowledge

See illustration
number(s): MO-0054

See illustration
number(s): MO-0055
See illustration
number(s): MO-0107

Motor Knowledge
Motor Knowledge

See illustration
number(s): MO-0074
See illustration
number(s): MO-0003

Motor Knowledge
See illustration
number(s): MO-0049
Motor Knowledge

See illustration
number(s): MO-0049

See illustration
number(s): MO-0031
Motor Knowledge
See illustration
number(s): MO-0046

See illustration
number(s): MO-0080
See illustration
number(s): MO-0031

See illustration
number(s): MO-0080

See illustration
number(s): MO-0004

See illustration
number(s): MO-0080
 Motor Knowledge
pressure of the fresh air
charge
Fuel

incorrect assembly of
idler springs
silencer See illustration
number(s): MO-0080
failure of the valve to
open
accurate metering and
the exhaust temperature
Open the indicator cocks
on those cylinders on
compression and apply
increased starting air
pressure.
low fuel viscosity

programming controls

K See illustration
number(s): MO-0080
cylinder oil feed rate
should be increased to
the maximum flow
capable of the metering
pump
pumping losses

excessive fuel pressure

increase lube oil flow

Compressor power See illustration
consumption varies number(s): MO-0081
directly as engine speed
varies.
Engine speed should be
reduced.

Motor Knowledge

See illustration
number(s): MO-0080

See illustration
number(s): MO-0080

See illustration
number(s): MO-0019
See illustration
number(s): MO-0032

Motor Knowledge
Valve lash is See illustration
mechanically adjusted. number(s): MO-0005

all of the above

weak rocker arm springs

air intake manifold

temperature
length of the stroke

vertical drive

banjo oiler line

a jammed indicator cock See illustration

number(s): MO-0043

friction clutch

8 to 1
See illustration
number(s): MO-0043

See illustration
number(s): MO-0025

Motor Knowledge
cylinder clearance

wrist pin movement

an overheated starting
motor
Temperature of the
cooling (sea) water
All of the above are
correct.
volume times the piston
stroke times the number
of cylinders
high exhaust
temperatures
begins and ends on a
constant volume basis

open the valve at the See illustration

proper time number(s): MO-0073
the spark will be too early
for the fuel

two-stroke/cycle on the See illustration

intake stroke number(s): MO-0020
Expansion See illustration
number(s): MO-0036

spring surge

starter pinion and ring

gear contact is not
correct
one power stroke for
every two crankshaft
revolutions
compression pressure is See illustration
1600 PSI number(s): MO-0035
exhaust back pressure is
low
part of the fuel is burned
as the piston is moving
away from top dead
center
The fuel/air charge is See illustration
compressed. number(s): MO-0035

Motor Knowledge

See illustration
number(s): MO-0035
See illustration
number(s): MO-0036

See illustration
number(s): MO-0038

Motor Knowledge
engine governor

at bottom dead center See illustration

number(s): MO-0039

high exhaust
temperatures
insufficient compression

secure the engine

Number of power strokes

per second.

all of the above

low scavenge air

pressure
at bottom dead center See illustration
number(s): MO-0039
respond quickly to
temperature changes

nearest to the cylinder

head
failure of the hot junction

nearest to the cylinder

head
open combustion See illustration
chamber number(s): MO-0068
5 See illustration
number(s): MO-0038
a clogged air cleaner

provide proper fuel/air

mixing
90.00‚

complete combustion

provide a place for

combustion
90‚ See illustration
number(s): MO-0004

burning of lube oil

Motor Knowledge

See illustration
number(s): MO-0038
 Motor Knowledge
The ahead and astern See illustration
clutches engage their number(s): MO-0085
respective gear trains by
sliding axially on the
input shaft.
to ensure the automatic
or manual blowdown rate
and frequency is
adequate for control of
total dissolved solids
fluctuate

A manually-operated
friction igniter
All of the above are See illustration
correct. number(s): MO-0003
excessive vibration
permits heated boiler See illustration
water to flash into steam number(s): MO-0078
shift the controls to low
fire

A case hardened scraper

view the main flame in its

outer periphery

All of the above are

correct.