A vertical turbine pump with the jump and Answer: A

motor closed coupled and design to be

installed underground, as in the case of a An expression of the mass of water vapor per
deepwell pump. unit mass of dry air

A. Horizontal split case pump A. Relative humidity

B. Booster pump B. Absolute humidity
C. Submersible pump C. Humidity ratio
D. Vertical shaft turbines pump D. Saturation ratio

Answer: C Answer: C

An underground formation that contains Which of the following is equivalent to 1lb?

sufficient saturated permeable material to
yield significant quantities of water. A. 5000 grains
B. 6000 grains
A. Aquifer C. 7000 grains
B. Ground water D. 8000 grains
C. Wet pit
D. Well water Answer: C

Answer: A The bypass factor for large commercial units

A timber, concrete or masonry enclosure having A. Around 20%

a screened inlet kept partially filled with B. Around 30%
water by an open body of water such as pond, C. Around 10%
lake, or steams. D. Around 50%

A. Aquifer Answer: C
B. Ground water
C. Wet pit Sometimes called specific humidity
D. Well water A. Relative humidity
B. Absolute humidity
Answer: C C. Humidity ratio
D. Saturation ratio
Water which is available from well, driven
into water bearing subsurface strata (aquifer) Answer: C

A. Aquifer For any given barometric pressure, the

B. Ground water humidity ratio is a function of the
C. Wet pit
D. Well water A. Critical temperature
B. Dew point temperature
Answer: B C. Dry bulb temperature
D. Wet bulb temperature
Imparts velocity to the liquid, resulting from
centrifugal force as the impeller is rotated. Answer: B

A. Impeller The humidity ratio corresponding to any given

B. Stuffing box dew point temperature varies with the total
C. Casing barometric pressure, increasing as the
D. Shaft sleeve barometric pressure

Answer: A A. Increases
B. Decreases
A means of throttling the leakage which would C. Varies
otherwise occur at the point of entry of the D. Constant
shaft into the casing.
Answer: B
A. Impeller
B. Stuffing box The ratio of the mass of water vapor in the
C. Casing air per unit mass of dry to the mass of water
D. Shaft sleeve vapor requires for saturation of the same air
sample
Answer: B
A. Relative humidity
Protect the shaft where it passes through the B. Absolute humidity
stuffing box. C. Humidity ratio
D. Saturation ratio
A. Impeller
B. Stuffing box Answer: D
C. Casing
D. Shaft sleeve A closed channel excavated through an
obstruction such as a ridge of higher land
Answer: D between the dam and the powerhouse is called

The ratio of the actual vapor density to the A. Canal

vapor density at saturation B. Headrace
C. Penstock
A. Relative humidity D. Tunnel
B. Absolute humidity
C. Humidity ratio Answer: D
D. Saturation ratio
The small reservoir in which the water level Answer: C
rises or falls to reduce the pressure swings
so that they are not transmitted to the closed To keep the deflected jet out of the way of
conduit is called the incoming jet, the actual angle is limited
to approximately
A. Penstock
B. Power reservoir A. 90 deg.
C. Pressure tank B. 135 deg.
D. Tunnel C. 165 %
D. 175 deg.
Answer: D
Answer: C
The regulation of the water in the form of a
relatively small pond of reservoir provided at The minimum fluid energy required at the pump
the plant is called inlet for satisfactory operation is known as

A. Pondage A. NPSHR
B. Water storage B. NPSHA
C. Reservoir C. Velocity head
D. Lake D. Friction head

Answer: A Answer: A

A structure used to relieve the reservoir of Throttling the input line to a pump and
excess water venting or evacuating the receiving tank

A. Spillway A. Both increase cavitation

B. Diversion channel B. Both decrease cavitation
C. Butress dam C. Both eliminate cavitation
D. Arch dam D. Both drive cavitation

Answer: A Answer: A

The fluid pressure difference created by Traditional reciprocating pumps with pistons
column of heated gas, as by7 chimney is called and rods can be either single-acting or double
acting and are suitable up to approximately
A. Natural draft
B. Forced draft A. 2000 psi
C. Induce draft B. 4000 psi
D. Required draft C. 8000 psi
D. 10,000 psi
Answer: A
Answer: A
The pressure rise from greater to a lesser
vacuum, created in a gas loop between stream In a sensible heating process the final
generator outlet and chimney by means of a fan humidity ratio is:
is called
A. Increased
A. Forced draft B. Decreased
B. Induced draft C. The same
C. Required draft D. Cannot be determined
D. Balanced draft
Answer: C
Answer: B
In an adiabatic saturation process the final
Also known as Francis turbines or radial flow relative humidity is:
turbines
A. Increased
A. Impulse turbines B. Decreased
B. Tangential turbines C. The same
C. Reaction turbines D. Cannot be determined
D. Axial flow turbines
Answer: A
Answer: C
Cooling and dehumidifying process is commonly
The turbine, draft tube and all related parts used for:
comprise what is known as
A. Summer air conditioning
A. Powerhouse B. Ice making
B. Forbay C. Winter cooling
C. Setting D. Heat pumping
D. Surge chamber
Answer: A
Answer: C
An adiabatic saturation process is also known
When a forbay is not part of the generating as:
plant’s design, it will be desirable to
provide a _________ in order to relieve the A. Constant WB temperature process
effects of rapid changes in flowrate. B. Constant DB temperature process
C. Constant DP temperature process
A. Forbay D. Constant vapor temperature process
B. Draft tube
C. Surge chamber Answer: A
D. Penstock
For efficient operation, the condensing Which of the following refrigeration cycle is
temperature should not be lower than practical when large quantities of waste or
inexpensive heat energy are available?
A. 5 C
B. 17 C A. Reciprocating compressors
C. 10 C B. Centrifugal compressors
D. 20 C C. Rotary compressors
D. Scroll compressors
Answer: A
Answer: D
For efficient operation, the condensing
temperature should not be more than Condensers used in small and medium sized up
to approximately 100 tons refrigerators.
A. 5 C
B. 17 C A. Air-cooled condensers
C. 10 C B. Water cooled condensers
D. 20 C C. High side condensers
D. Low side condensers
Answer: B
Answer: A
The process of simultaneous heating and
dehumidifying is known as: An evaporator in a refrigeration unit makes
use of which heat transfer modes?
A. Sensible heating A. Conduction
B. Cooling and dehumidifying B. Convection
C. Sensible cooling C. Radiation
D. Chemical dehumidifying D. All of the above

Answer: D Answer: D

The process in increasing the dry-bulb Energy added to a vapor is known as a latent
temperature without changing the humidity heat of vaporization
ratio is known as:
A. Latent heat of vaporization
A. Sensible heating B. Sensible heat of vapor
B. Cooling and dehumidifying C. Superheat
C. Sensible cooling D. B and C
D. Heating and dehumidifying
Answer: C
Answer: A
The vaporization process that occurs at
The process of simultaneous cooling and temperature below the triple point of a
decreasing of humidity ratio is known as: substance is called.

A. Sensible cooling A. Evaporation

B. Cooling and humidifying B. Boiling
C. Cooling and dehumidifying C. Sublimation
D. Heating and dehumidifying D. Condensation

Answer: C Answer: C

The process of cooling without changing the As the pressure increases, the amount of work
humidity ratio is known as: it can do increases and its enthalpy

A. Sensible heating A. Increases

B. Cooling and dehumidifying B. Remained the same
C. Sensible cooling C. Decreases
D. Heating and humidifying D. Pressure and enthalpy has no relation at
all
Answer: C
Answer: A
The process of simultaneous heating and
humidifying ratio is known as: During the compression process, the internal
energy of the refrigerant vapor
A. Sensible cooling
B. Cooling and humidifying A. Increases
C. Heating and humidifying B. Decreases
D. Heating and dehumidifying C. Remain the same
D. Internal energy has no relation to the
Answer: C compression process

Which of the following cycle is bulky and Answer: A

involves toxic fluids hence it is unsuitable
for home and autocooling The measure of the amount of thermal energy
transfer occurring within the evaporator per
A. Carnot refrigeration cycle unit mass under stated conditions.
B. Absorption cycle A. Refrigeration capacity
C. Vapor and compression cycle B. Heat capacity
D. Air refrigeration cycle C. Refrigeration effect
D. Heat absorptivity
Answer: B
Answer: C
The peak power that can be produced on an Undergrounds system of hot water and / or
occasional basis steam

A. Brakepower A. Hydrothermal resource

B. Intermittent rating B. Geothermal resource
C. Continous duty rating C. Hot water resource
D. Power rating D. High pressure water system

Answer: B Answer: A

A value of a property that includes the effect The process of returning spent geothermal
of friction is known as: fluids to the subsurface is called

A. Brake value A. Injection

B. Indicated value B. Returning
C. Friction value C. Rejection
D. Actual value D. Exhaustion

Answer: A Answer: A

Forced draft fans are run at relatively high The simultaneous demand of all customers
speeds in the range of required at any specified point in an electric
power system is called
A. 1200 to 1800 rpm
B. 1500 to 2000 rpm A. Demand
C. 1000 to 1600 rpm B. Electrical demand
D. 900 to 1500 rpm C. Power demand
D. Load
Answer: A
Answer: D
Chimneys that rely on natural draft are
sometimes referred to as The electricity generating plants that are
operated to meet the peak or maximum load on
A. Natural chimney the system are called
B. Normal chimney
C. Gravity chimney A. Peaking plants
D. Stack B. High-load plants
C. High demanding plants
Answer: C D. Add-on plants

For realistic problems, the achievable stack Answer: A

effect probably should be considered to be
The capacity of a substance to transmit a
A. 75% of the ideal fluid is called
B. Equal to the ideal
C. 80 % of the ideal A. Fluidity
D. Half the ideal B. Permeability
C. Porosity
Answer: C D. Smoothness

In a balanced system, the available draft is Answer: B

A. Unity
B. 100 The ratio of the aggregate volume pore spaces
C. Zero in rock or soil to its total volume is called
D. Infinite
A. Porosity
Answer: C B. Sphericity
C. Permeability
It is a device used for atomizing or cracking D. Salinity
fuel oil and through which the fuel oil is
injected into the working cylinders of Diesel Answer: A
engines
Cooling efficiency is typically
A. Atomizer
B. Injector A. 75 to 80%
C. Fuel spray nozzle B. 50 to 70%
D. Cracker C. 80 to 85%
D. 90 to 95%
Answer: A
Answer: B
The device that transfer thermal energy from
one fluid to another Forced draft towers can cool the water to
within
A. Condenser
B. Feedwater A. 10 to12 F
C. Evaporator B. 5 to 6 F
D. Heat exchanger C. 20 to 24 F
D. 2.5 to 3 F
Answer: D
Answer: B
The higher the wet bulb temperatures Throttling the input line to a pump and
venting or evacuating the receiver tank
A. The higher the efficiency
B. The lower the efficiency A. Both increase cavitation
C. The efficiency is limited B. Both decrease cavitation
D. The efficiency is maximum C. Both eliminate cavitation
D. Both drive cavitation
Answer: B
Answer: A
Define the relative difficulty in cooling,
essentially the relative amount of contact Traditional reciprocating pumps with pistons
area or fill volume required and rods can be either single-acting or double
acting and are suitable up to approximately
A. Heat load
B. Tower load A. 2000 psi
C. Cooling duty B. 4000 psi
D. Rating factor C. 8000 psi
D. 10,000 psi
Answer: D
Answer: A
Evaporation loss can be calculated from the
humidity ratio increase and is approximately Plunger pumps are only single-acting and are
_________ decrease in water temperature suitable up to approximately
A. 2000 psi
A. 0.18% per C B. 4000 psi
B. 0.25% per C C. 8000 psi
C. 0.10% per C D. 10,000 psi
D. 0.30% per C
Answer: D
Answer: A
The ratio of the actual to the ideal heat
Water lost in small droplet and carried away transfer coefficient.
by the air flow
A. Fouling factor
A. Range B. Sensible heat ratio
B. Approach C. Cleanliness factor
C. Drift D. Biot number
D. Bleed-off
Answer: C
Answer: C
The ratio of the maximum to minimum mass steam
The ratio of total dissolved solids in the flow rates at which the temperature can be
recirculating water to the total dissolved accurately contained by the desuperheater.
solids in the make-up water.
A. Cleanliness factor
A. Ratio of concentration B. Capacity factor
B. Cooling efficiency C. Turndown ratio
C. Coil efficiency D. Fouling factor
D. Bypass factor
Answer: C
Answer: A
With a reversible regenerator, the thermal
A dry-cooling tower where steam travels efficiency of the Ericsson cycle is ______ to
through large diameter “trunks” to a cross- that of the Carnot cyle
flow heat exchanger where it is condensed and
cooled by the cooler air A. Less than
B. Greater than
A. Direct condensing tower C. Proportional
B. Indirect condensing dry cooling tower D. Equal
C. Evaporative cooling tower
D. Atmospheric cooling tower Answer: D

Answer: A The electron magnetic radiation emitted from

the daughter nucleus when an alpha particles
The minimum fluid energy required at the pump leaves the patent atom
inlet for satisfactory operation is known as
A. NPSHR A. Neutron
B. NPSHA B. Position
C. Velocity head C. Gamma ray
D. Friction head D. K-capture

Answer: A Answer: C

The actual fluid energy at the inlet Which of the following statement is a scheme
for energy storage?
A. NPSHR
B. NPSHA A. Pumped hydro
C. Velocity head B. Magnetic energy storage
D. Friction head C. Thermal energy storage
D. All of the above
Answer: B
Answer: D
A reactor that employs fast or high energy Fluid that are pumped in processing work are
neutrons and contains no moderator is called frequently more viscous than water. Which of
the following statement is correct?
A. High energy reactor
B. Fast reactor A. Reynolds number varies directly as the
C. High speed reactor viscosity
D. Turbo reactor B. Efficiency of a pump increases as the
viscosity increases
Answer: B C. Increased fluid friction between the pump
parts and the passing fluid increases useful
A reactor that utilizes slow moving neutrons work
D. Working head increases as the viscosity
A. Slow reactor
B. Intermediate reactor Answer: C
C. Thermal reactor
D. Slow speed reactor The law that states “Entropy of all perfect
crystalline solids is zero at absolute zero
Answer: C temperature”

The water bearing stratum of permeable san, A. Zeroth law of thermodynamic

rock, or gravel is called B. First law of thermodynamics
C. Second law of thermodynamics
A. Reservoir D. Third law of thermodynamics
B. Water source
C. Aquifer Answer: D
D. Well
An expression of the mass of water vapor per
Answer: C unit mass of dry air

The electricity generating units that are A. Relative humidity

operated to meet the constant or minimum load B. Absolute humidity
on the system is called C. Humidity ratio
D. Saturation ratio
A. Constant load plants
B. Baseload plants Answer: C
C. Invariable load plants
D. Steady load plants Which of the following is equivalent to 1 lb?
A. 5000 grains
Answer: B B. 6000 grains
C. 7000 grains
The effectiveness of a body as a thermal D. 8000 grains
radiator at a given temperature,
Answer: C
A. Absorptivity
B. Conductivity The locus of states that the same value of
C. Emissivity stagnation enthalpy and mass flux is called.
D. Reflectivity A. Fanno line
B. Reyleigh line
Answer: C C. Willian’s line
D. Mollier’s line
What are the main components in a combined
cycle power plant? Answer: A

A. Diesel engine and air compressor Combining the conservation of mass and
B. Steam boiler and turbine momentum equations into a single equation and
C. Gas engine and waste heat boiler plotting it on the h-s diagram yield a curve
D. Nuclear reactor and steam boiler called

Answer: C A. Fanno line

B. Reyleigh line
The size of a steam reciprocating pumps is C. Willian’s line
generally designed by a three-digits number D. Mollier’s line
size as 646. The first digit designates
Answer: B
A. Stroke of the pump in inches
B. Inside diameter of the steam cylinder Across the shock, the stagnation temperature
measured in inches of an ideal gas
C. Percent clearance
D. Number of cylinder A. Increases
B. Decreases
Answer: B C. Remains constant
D. Proportional
The power required to deliver a given quantity
of fluid against a given head with no losses Answer: C
in the pump is called
Which of the following types of air dryers
A. Wheel power works by absorbing moisture on a solid
B. Brake power dessicant or drying material such as activated
C. Hydraulic power alumina, silicon gel or molecular sieve?
D. Indicated power
A. Regenerative dryer
Answer: C B. Spray dryer
C. Deliquescent dryer
D. Refrigerated dryer
Answer: C The geothermal solution which contains
appreciable amounts of sodium chloride or
When two bodies, isolated from other other salts is called
environment, are in thermal equilibrium with a
third body, the two are in thermal equilibrium A. Sulfur dioxide
with each other. B. Potassium silicate
C. Sea water
A. Zeroth law of thermodynamic D. Brine
B. First law of thermodynamics
C. Second law of thermodynamics Answer: D
D. Third law of thermodynamics
The quantity of heat required to raise the
Answer: A temperature of one pound of water one degree
Fahrenheit at standard conditions.
The sum of the energies of all the molecules
in a system where energies appear in several A. Btu
complex forms is the B. Calorie
C. Joule
A. Kinetic energy D. Centigrade
B. Internal energy
C. Potential energy Answer: A
D. Friction energy
The process that uses a stream of geothermal
Answer: B of hot water or stream to perform successive
task requiring temp is called
The Carnot refrigeration cycle includes all of
the following process except A. Diminishing heat
B. Decreasing heat
A. Isentropic expansion C. Cascading heat
B. Isenthalpic expansion D. Negative gradient process
C. Isothermal expansion
D. Isentropic compression Answer: C

Answer: B The water formed by condensation of steam is

called
The maximum possible work that can be obtained
a cycle operating between two reservoirs is A. Distilled water
found from B. Condensate
C. Dew
A. Process irreversibility D. Condenser
B. Carnot efficiency
C. Availability Answer: B
D. Reversible work
A structure that removes heat from condensate
Answer: B is called

The following factors are necessary to define A. Desuperheater

a thermodynamic cycle expect B. Cooling tower
C. Evaporator
A. The working substance D. Condenser
B. High and low temperature reservoirs
C. The time it takes to complete the cycle Answer: B
D. The means of doing work on the system
In a typical hydroelectric generating plant
Answer: C using reaction turbines, the turbine is
generally housed in a
A temperature above which a given gas cannot
be liquefied A. Powerhouse
A. Cryogenic temperature B. Penstock
B. Absolute temperature C. Forbay
C. Vaporization temperature D. Setting
D. Critical temperature
Answer: A
Answer: D
After the water passes through the turbine, it
The geometrical electricity generating plants is discharges through the draft tube to the
that employs a closed-loop heat exchange receiving reservoir known as the
system in which the heat of the primary fluid
is transferred to a secondary fluid, which is A. Tail race
thereby vaporized and used to drive a turbine B. Tailwater
generator set C. Draft tube
D. Setting
A. Binary cycle plant
B. Dual cycle plant Answer: A
C. Double cycle plant
D. Cascade cycle The turbine, draft tube and all related parts
comprise what is known as
Answer: A
A. Powerhouse
B. Forbay
C. Setting
D. Surge chamber

Answer: C
When a forbay is not part of the generating C. Less than the mass of the suction vapor
plant’s design, it will be desirable to that the compressor takes in at the suction
provide a ________ in order to relieve the inlet per unit time
effects of rapid changes in flowrate. D. Greater that the mass of the suction vapor
that the compressor takes in at the suction
A. Forbay inlet per unit time
B. Draft tube
C. Surge chamber Answer: B
D. Penstock
A boiler operated at pressure not exceeding
Answer: C 1.055kg/cm2 gage steam, or water temperature
no exceeding 121˚C.
To keep the deflected jet out of the way of
the incoming jet, the actual angle is limited A. Low pressure heating boiler
to approximately B. Hot water supply boiler
C. Miniature
A. 90 deg. D. Power boiler
B. 135deg.
C. 165% Answer: A
D. 175deg.
The very hot steam that doesn’t occur with a
Answer: C liquid

The spontaneous vaporization of the fluid, A. Pure steam

resulting in a degradation of pump B. Saturated vapor
performance. C. Critical steam
D. Dry steam
A. Cavitation
B. Vapor lock Answer: D
C. Available head
D. Net head The steam produced when the pressure on a
geothermal liquid is reduced
Answer: A
A. Low pressure steam
A dry cooling tower where steam is condensed B. High quality steam
by cold water jets (surface or jet condenser) C. Sub pressure steam
D. Flashed steam
A. Direct condensing tower
B. Indirect condensing dry cooling tower Answer: D
C. Evaporative cooling tower
D. Atmospheric cooling tower The vent or hole in the Earth surface, usually
in a volcanic region, from which, gaseous
Answer: B vapors, or hot gasses issue

If the heat is being removed from water, the A. Fumaroles

device is known as B. Crater
C. Hot spot
A. Chiller D. Hot spring
B. Cooler
C. Air conditioner Answer: A
D. Air cooler
The earth interior heat made available to man
Answer: A by extracting it from hot water or rocks.

Which of the following is the refrigerant “of A. Geological heat

choice” in uniting air conditioners? B. Geothermal heat
C. Volcanic heat
A. R-22 D. None of these
B. R-123
C. R-11 Answer: B
D. R-502
Device that takes advantage of the relatively
Answer: A constant temperature of the Earth’s interior,
using it as a source and sink of heat for both
In new equipment, which of the following heating and cooling.
replace R-11?
A. Geothermal devices
A. R-12 B. Geothermal generator
B. R-123 C. Geothermal heat pumps
C. R-502 D. Geothermal turbines
D. R-22
Answer: C
Answer: B
The spring that shoots jets of hot water and
The mass flow rate produces by the compressor steam into the air is called
is
A. Geyser
A. Proportional to the mass of the suction B. Hot jet
vapor that the compressor takes in at the C. Thermal jet
suction inlet per unit time D. Guyshen
B. Equal to the mass of the suction vapor that
the compressor takes in at the suction inlet Answer: A
per unit time
What is the power seat width of a spray valve? Determine the quantity of latent heat
transferred to an evaporator when 5 kg of
A. 1/16 in. water undergoes those changes from a liquid at
B. 1/32 in. 0¢ªC to ice at 0¢ªC.
C. 1/8 in.
D. 1/4 in. A. 1,300 kJ
B. 1,675 kJ
Answer: A C. 1,450 kJ
D. 1,800 kJ
A device which automatically governs or
controls the speed of an engine. Answer: B

A. Servomotor Compute the rate of water transfer by melting

B. Indicator an ice at a rate of 50 kg/hr.
C. Governors
D. Speedometer A. 8 kJ/sec
B. 10 kJ/sec
Answer: C C. 5 kJ/sec
D. 12 kJ/sec
The useful energy transfer in Btu/hr divided
by input power in watts. This is just the Answer: C
coefficient of performance expressed in mixed
units. 10 kg of water at 60¢ªC receives 42,000kJ of
heat coming from the surrounding. Assuming it
A. Energy efficient ratio is open to the atmosphere, how many kilograms
B. Coil efficient of water will be vaporized?
C. Bypass factor
D. Sensible heat ratio A. 18 kg
B. 15 kg
Answer: A C. 10 kg
D. 20 kg
If EER is the energy efficiency ratio, and COP
is the coefficient of performance then Answer: A

A. EER=3.41COP As the liquid changes phase to vapor, its

B. COP=3.41EER enthalpy
C. EERxCOP=3.41
D. 3.41EERxCOP=1 A. Increases
B. Decreases
Answer: A C. Remains constant
D. Enthalpy has no relation to phase change
Which of the following is a reversed Rankine
vapor cycle? Answer: A

A. Carnot refrigeration cycle Which of the following processes does not

B. Vapor refrigeration cycle alter the kinetic energy level of a substance?
C. Air refrigeration cycle
D. Absoption cycle A. Fusion
B. Adding sensible heat to a solid
Answer: B C. Adding sensible heat to a liquid
D. Superheating a vapor
The most common type of refrigeration cycle,
finding application in household Answer: A
refrigerators, air conditioners for cars and
houses, chillers and so on. Condensers used for larger capacities
refrigerators.
A. Carnot refrigeration cycle
B. Vapor refrigeration cycle A. Air-cooled condersers
C. Air refrigeration cycle B. Water-cooled condensers
D. Absoption cycle C. High side condensers
D. Low side condenser
Answer: B
Answers: B
Which of the following is a reserved Brayton
cycle? Coolers and chillers for water generally
operate with an average temperature difference
A. Carnot refrigeration cycle of
B. Vapor refrigeration cycle
C. Air refrigeration cycle A. 3 to 11 C
D. Absoption cycle B. 5 to 8 C
C. 6 to 22 C
Answer: C D. 10 to 16 C

A 100kg is at 0¢ªC is heated by supplying Answer: A

2000KJ of heat to it. If the heat of fusion is
335kJ/kg how many kilograms of ice will melt To avoid freezing problems, entering
into water? refrigerant should be

A. 8 kg A. Below-2 C
B. 10 kg B. Above-2 C
C. 6 kg C. Equal to-2 C
D. 3 kg D. 0 C

Answer: C Answer: B
Suction lines should not be sized too large, A manometer is an instrument that is used to
as reasonable velocity is needed to carry oil measure:
from the evaporator back to the compressor.
For horizontal suction lines, the recommended A. Air pressure
minimum velocity is B. Condensate water level
C. Heat radiation
A. 3.8 m/s D. Air volume
B. 6.1 m/s
C. 7.1 m/s Answer: A
D. 4.8 m/s
The relationship of water vapor in the air at
Answer: A the dew point temperature to the amount that
should be in the air if the air were saturated
Type of turbine used for low heads, high at the dry-bulb temperature is:
rotational speeds and larger flow rates
A. Partial pressure actual dew point
A. Axial flow turbines B. Percentage humidity
B. Reaction turbines C. Relative humidity
C. Radial flow turbines D. Run faster
D. Impulse turbines
Answer: A
Answer: A
All of the following statements about wet bulb
To keep the deflected jet out of the way of temperature are true, EXCEPT
the incoming jet, the actual angle is limited
to approximately A. Wet bulb temperature aequals adiabatic
saturation temperature
A. 135 deg. B. Wet bulb temperature is the only
B. 150 deg. temperature necessary to determine grains
C. 165 deg. water per lb of dry air
D. 175 deg. C. Wet bulb temperature lies numerically
between dew point and dry bulb temperature for
Answer: C unsaturated systems
D. Wet bulb temperature equals both dry-bulb
Which of the following turbines are and dew point temperature at 100% relative
centrifugal pumps operating in reverse? humidity

A. Reaction turbines Answer: C

B. Impulse turbines
C. Tangential turbines Heat added to or removed from a substance that
D. Axial flow turbines cause a change of temperature:

Answer: A A. Absolute heat

B. Latent heat
Weight per unit volume is termed as: C. Specific heat
D. Sensible heat
A. Specific gravity
B. Specific density Answer: D
C. Weight density
D. Pressure The ratio of the actual to the ideal heat
transfer coefficient.
Answer: C
A. Fouling factor
Measure of hotness or coldness of the body B. Sensible heat ratio
C. Cleanliness factor
A. Pressure D. Biot number
B. Temperature
C. Energy Answer: C
D. Entropy
The ratio of the maximum to minimum mass steam
Answer: B flow rates at which the temperature can be
accurately contained by the desuperheater.
The temperature at which the water vapor in
the air begins to condensed, or the A. Cleanliness factor
temperature at which the relative humidity of B. Capacity factor
air becomes 100%. C. Turndown ratio
D. Fouling factor
A. Flash point
B. Boiling point Answer: C
C. Dew point
D. Freezing point Used to described the act of blowing the
exhaust product out with the air-fuel mixture
Answer: C
A. Supercharging
It consists of a wet and dry bulb thermometers B. Scavenging
mounted on a strip of metal C. Honing
D. Choking
A. Manometer
B. Gyrometer Answer: B
C. Pyrometer
D. Sling psychrometer

Answer: D
A form of supercharging in which the exhaust Sometimes called percentage humidity
gases drive the supercharger
A. Relative humidity
A. Lugging B. Absolute humidity
B. Honing C. Humidity ratio
C. Turbocharging D. Saturation ratio
D. Blower charging
Answer: D
Answer: C
When measuring ____________ of air, the bulb
The maximum speed of the turbine under no and of the thermometer should be shaded to reduce
no governing action is called the effect of direct radiation

A. Runaway speed A. Dry bulb temperature

B. Pre governing speed B. Wet bulb temperature
C. Governing speed C. Critical temperature
D. No load governing D. Saturation temperature

Answer: A Answer: A

Which of the following statements is false An ordinary thermometer whose bulb is enclosed
when gasoline is used as diesel fuel. in a wetted cloth sac or wick

A. Gasoline does not ignite A. Dry bulb thermometer

B. Gasoline wears the fuel-injection pumps B. Wet bulb thermometer
because of its low viscosity C. Ordinary thermometer
C. Addition of lubrication oil to gasoline D. Mercury thermometer
will just severe the situation
D. All of the above Answer: B

Answer: C To obtain an accurate reading with a wet bulb

thermometer, the wick should be saturated with
Which of the following is an advantage of
hydro-plants? A. Clean air
B. Vapor
A. Hydro plants provide ancillary benefits C. Moist
like irrigation, flood control, aquaculture D. Clean water
navigation etc.
B. Modern hydro generators give high Answer: A
efficiency over considerable range of load.
This helps in improving the system The amount by which the wet bulb temperature
C. Due to its great ease of taking up and is reduced below the dry bulb temperature
throwing off the load, the hydro power can be depends on the relative humidity of the air
used as the ideal spinning reserve in a system and is collective
mix of the thermal, hydro and power station
D. All of the above A. Range
B. Approach
Answer: B C. Drify
D. Wet bulb depression
The hole area behind the dam draining into a
stream or river across which dam has been Answer: D
constructed is called
The measure of the relationship between the
A. Lake dry bulb and dewpoint temperature of the air
B. Forebay and as such, it provides a convenient means of
C. Catchment area Dewpoint temperature of the air when the dry
D. Reserve potential bulb temperature is known

Answer: C A. Wet bulb temperature

B. Saturation temperature
Dams constructed primarily to store flood C. Humidity ratio
waters called D. Relative humidity

A. Storage dams Answer: A

B. Diversion dams
C. Detention dam An index of the total heat (enthalpy) of the
D. None of the above air

Answer: C A. Wet bulb temperature

B. Saturation temperature
A channel which leads water to a turbine is C. Dry bulb temperature
called D. Dewpoint temperature

A. Canal Answer: A
B. Tailrace
C. Penstock The sensible heat of the air is a function of
D. Headrace the
A. Wet bulb temperature
Answer: D B. Dry bulb temperature
C. Dewpoint temperature
D. Saturation temperature

Answer: B
The latent heat of the air is a function of
the
A. Wet bulb temperature
B. Dry bulb temperature
C. Dewpoint temperature
D. Saturation temperature

Answer: A