926.

A heavy rotating body which serves as a reservoir for absorbing and

redistributing
kinetic energy.
a) brakes c) flywheel
b) fan d) gear

927. Which of the following is not the use of spring??

a) absorbs energy c) measure weight
b) measure the thickness d) source of energy in clocks

928. The ratio of mean diameter of coil over the coil diameter is known as
a) diameter ratio c) spring index
b) lead d) Wahl factor

929. The overall length of the spring when it is compressed until all adjacent coils
touched.
a) compressed length c) operating length
b) free length d) solid length

930. The length of coil spring under no load is known as

a) compressed length c) operating length
b) free length d) solid height

931. In general, steel springs are made of relatively high carbon steel usually
a) 5% c) less than 0.5%
b) 10% d) more than 0.5%

932. When heat – treated wire is coiled cold it should be stress relieved for bending
stresses
after cooling by being heated at some
a) 400ºF c) 600ºF
b) 500ºF d) 700ºF

933. A low-cost spring material, suitable where service is not severe and
dimensional
precision is not needed.
a) hard drawn wire spring c) helical tension spring wire
b) helical spring d) stainless steel

934. An elastic stored energy machine element that when released will recover its
basic
form.
a) brakes c) flywheel
b) clutch d) spring
935. A hard – drawn also 80% reduction but it is made of high – grade steel.
a) chromium silicon wire c) oil tempered wire
b) music wire d) song wire

936. A spring wire with good quality for impact loads and moderately high
temperature eis
known as:
a) chromium – silicon c) helical spring wire
b) hard drawn wire spring d) helical tension spring wire

937. A type of coil where the helical coil is wrapped into a circle forming an annular
ring.
a) volute spring c) hair spring
b) motor spring d) garter spring

938. A type of spring where thin flat strips wound up on itself as a plane spiral,
usually
anchored at the inside.
a) garter spring c) motor spring
b) hair spring d) volute spring

939. A type of spring made in the form of a dished washed

a) Belleville spring c) motor spring
b) hair spring d) volute spring

940. In laminated spring, the strips are provided in different lengths for
a) economy c) reduction in weight
b) improved appearance d) space consideration of the utility stage

941. When a spring is made of ductile material the curvature factor would be
a) constant c) unity
b) positive d) zero

942. The solid length plus the clearance plus the maximum deflection is called
a) distance c) height
b) free length d) original length

943. The majority of coil springs are made of coil tempered carbon steel wire
containing
carbon of
a) 0.30 to 0.40% c) 0.50 to 0.60%
b) 0.40 to 0.50% d) 0.60 to 0.70%

944. Experimental results indicates that the actual frequency of the spring is from
a) 5 to 10% c) 15 to 20%
b) 10 to 15% d) 20 to 25%
945. According to W.M. Griffith the critical frequency of the spring should behold at
least
_____ times the frequency of application of a periodic load.
a) 5 c) 15
b) 10 d) 20

946. The actual number of coils is ______ in a square and ground end.
a) n c) nd
b) n + 2 d) (n + 1) d

947. The solid length of squared ends is

a) (n + 3) d c) np
b) (n + 1) d d) n + 2

948. The free length of ground ends is

a) np + 3d c) np + d
b) np + 2d d) np

949. The shortest length for the spring during normal operation is known as
a) compressed length c) operating length
b) free length d) solid length

950. The relationship between the force exerted by a spring and its deflection is
called:
a) spring angle c) spring rate
b) spring index d) Wahl factor

951. In many flywheels designs about ________ percent of the weight is concentrated
on
the hub and arms.
a) 20 c) 35
b) 30 d) 45

952. Refers to the space between adjacent coils when the spring is compressed to
its
operating length.
a) coil allowance c) coil gap
b) coil clearance d) coil tolerance

953. Refers to flat or curved made of thin superimposed plates and forming a
cantilever or
beam of uniform strength.
a) conical spring c) graduated spring
b) full spring d) laminated spring

954. The ratio of the mean diameter of the spring to the wire diameter is called
a) spring ratio c) spring index
b) spring rate d) spring constant

955. Refers to the axial distance from a point on one coil to the corresponding point
on the
next adjacent coil
a) lead c) spring deflection
b) pitch d) spring constant

956. The spring index for general industrial uses should be

a) 5 to 7 c) 7 to 9
b) 6 to 8 d) 8 to 10

957. The spring index of valve and clutch is

a) 3 c) 7
b) 5 d) 9
958. The most practical spring designs produce a pitch angle is less than
a) 12º c) 20º
b) 15º d) 25º

959. Engine valves get shut by means of

a) adjusting screw c) valve lock
b) tappet d) valve spring

960. Which of the following material to be used for leaf and coil springs??
a) AISI 3140 c) AISI 3240
b) AISI 3150 d) AISI 4063

961. The length of a coil spring times the effective number of coils is called
a) active length c) operating length
b) compressed length d) solid length

962. For springs subjected to light service, the factor of safety of ____ is suggested.
a) 1.5 c) 2.5
b) 2.0 d) 3.0

963. Cross wire grooves are types which

a) absorbs shocks because of road unevenness
b) decrease the danger of skidding
c) provide better load carrying capacity
d) provide good fraction

964. The ____________ of parallel connection of spring is always constant.

a) elongation c) resistance
b) load d) thermal conductivity

965. Speedometer drive is generally taken from

a) dynamo c) front wheel
b) flywheel d) gear

966. The device for smoothing out the power impulses from the engine is known as
a) brake c) flywheel
b) clutch d) gear drive

967. Typical hub length falls between

a) D to 7D c) 1.25D to 5D
b) 1.25D to 2.4D d) 1.3D to 3.4D

968. The recommended coefficient of fluctuation of flywheels for punching,

shearing, and
pressing machine is
a) 0.05 to 0.10 c) 0.01 to 0.02
b) 0.03 to 0.05 d) 0.002 to 0.005

969. Attached to the rear end of the crankshaft is the

a) drive pulley c) timing gear
b) flywheel d) vibration damper

970. Flywheel is also known as

a) balance wheel c) rear wheel
b) front wheel d) steering wheel

971. The kind of energy stored in the flywheel is

a) internal energy c) potential energy
b) kinetic energy d) rest energy

972. The function of the flywheel is

a) to keep the speed fluctuation within desired limits
b) to keep the angular advance or retardation within prescribed limits as
compared with a perfectly uniform angular speed
c) to limit the momentary rise or fall in speed during sudden changes in load
d) all of the above

973. A large rotary machine parts whose function is to store energy and to produce
uniform
angular velocity of the shaft of reciprocating engine is known as
a) cam c) flywheel
b) chuck d) idler

974. A massive wheel, which by its inertia assists in securing uniform motion of
machinery
by resisting sudden changes of speed.
a) crank c) flywheel
b) linkage d) planetary gear

975. The function of a flywheel is to

a) complete the useful stroke c) keep the engines weight light
b) complete the un useful stroke d) operate the engines

976. Which of the following has been considered as general-purpose wire rope?
a) 6 x 19 IWRC c) 17 x 25 IWRC
b) 7 x 25 IWRC d) 6 x 9 IWRC

977. A statement of how the total moment is derived from a number of forces acting
simultaneously at a point.
a) Goodman’s theorem c) Varignon’s theorem
b) Soderberg’s theorem d) Moore’s therorem

978. When the line of action of the load bisects the arc of partial bearing, the
bearing is said
to be
a) eccentrically loaded c) centrally loaded
b) fully loaded d) partially loaded

979. What are the two principal parts of a Journal bearing??

a) bearing and journal c) clearance and fitted
b) shaft and babbit d) shaft and cylinder

980. What is the maximum shaft angle for a single Hooke’s coupling??
a) 10º c) 15º
b) 17º d) 20º

981. When radii of both the bearing and the journal are the same, then the bearing
is said
to be
a) fitted bearing c) full bearing
b) clearance bearing d) ambiguous bearing

982. Which of the following cannot be a Poisson’s ratio of a material??

a) 0.35 c) 0.75
b) 0.40 d) 0

983. A conclusion repeatedly verified by experiment is that the smoother surface:

a) has the greater load capacity of the bearing
b) has the lesser capacity of the bearing
c) has constant load
d) none of these

984. Which of the following considers the 200 series of bearing??

a) heavy c) light
b) medium d) all of these

985. Which of the following considers the 300 series of bearing??

a) heavy c) light
b) medium d) all of these

986. Which of the following is used to change the direction of an applied tensile
force??
a) gears c) pulleys
b) flywheels d) ropes

987. A fine finishing operation, similar to polishing, using a very fine polishing
compound.
a) burnishing c) calorizing
b) buffing d) electroplating

988. A type of roller bearing in which the balls are assembled by the eccentric
displacement
of the inner ring.
a) shallow groove ball bearing c) self – aligning ball bearing
b) filling – slot ball bearing d) deep – groove ball bearing

989. Which of the following is not a type of ball bearing??

a) shallow groove ball bearing c) self – aligning ball bearing
b) filling – slot ball bearing d) deep – groove ball bearing

990. A simple mechanical machine with the ability to increase an applied force.
a) hinges c) lever
b) roller d) spring

991. Any device used to raise or lower an object.

a) hoist c) lever
b) spring d) roller

992. The load at which a column fails is known as:

a) dead load c) moving load
b) critical load d) dynamic load

993. A shaft’s natural frequency of vibration is referred to as the:

a) normal speed c) critical speed
b) high speed d) low speed

994. For most wire ropes and chains with 180º contact, the loss factor at low speeds
varies
between:
a) 1.03 to 1.06 c) 1.07 to 1.10
b) 1.20 to 1.50 d) 1.60 to 1.80

995. What method to determine the reactions on continuous beams?

a) two-moment equations c) second moment equations
b) three-moment equations d) third moment equations

996. What is the best method for increasing a spring’s fatigue life??
a) sprickling c) shot peening
b) stress relieving d) shot relieving
997. The distance from a point on one gear to the corresponding point measured
along the
base circle.
a) diametral pitch c) circular pitch
b) normal pitch d) chordal pitch

998. Which of the following is a single measure that combines the external dynamic
load
of an application with a gear drive’s reliability and operating life?
a) ratio factor c) service factor
b) reliability factor d) life factor

999. Which of the following is the most dominant cause (approximately 80%) of
machine
failures??
a) torsion c) fatigue failures
b) negligence d) compression

1000. It is the distance in inches a screw thread (a helix) advances axially in one
turn.
a) pitch c) lead
b) mean pitch d) circular pitch

1001. Which of the following bolts is recommended for general use??

a) UNC c) UNF
b) UNEF d) NC

1002. It is frequently used bolt in automotive and aircraft industries.

a) UNC c) UNF
b) UNEF d) NC
1003. Which of the following is a particular bolt used in aeronautical equipment.
a) UNC c) UNC
b) UNEF d) NC

1004. What type of bolt usually used for high pressure pipe flanges, cylinder head
studs, etc.
a) UNC c) UNEF
b) UNF d) 8 UN

1005. It is the stress or load induced by the tightening operation.

a) initial stress c) residual stress
b) initial tension d) none of these
1006. For non – metallic gaskets, it has been found that they should have a certain
minimum amount of compression as ______ for a certain cork gasket.
a) 62% c) 68%
b) 86% d) 76%

1007. It is the diameter of the imaginary cylinder that bounds the crest of an
external
thread and the roots of an internal thread.
a) mean diameter c) stress diameter
b) root diameter d) major diameter

1008. It is a screw fastening with a nut on it.

a) bolt c) rivet
b) U-bolt d) screw

1009. A fastening which has no nut and turns in to a threaded hole.

a) bolt c) rivet
b) fastener d) screw

1010. An old name for an unfinished through bolt comes with a square.
a) coupling bolt c) machine bolt
b) stud bolt d) automobile bolt

1011. It is the ratio of the length of the column and the radius of gyration of the
cross – sectional area about a centroidal axis.
a) contact ratio c) centroidal ratio
b) slenderness ratio d) column ratio

1012. Under theories of failure, the value of shear stress is how many times that of
the tensile stress??
a) four times c) double
b) half d) one – fourth

1013. It is the difference in the radii of the bearing and the journal.
a) even clearance c) fit clearance
b) clearance ratio d) radial clearance

1014. What is the approximate length-to-diameter ratio of hydrodynamic

bearings??
a) 1 c) 3
b) 4 d) 2
1015. The theory of mechanics of material shows that the results from the
octahedral
shear stress theory and those from maximum distortion energy theory are:
a) the same c) more than
b) less than d) not related

1016. It is the distance measure axially from a point on one thread to the
corresponding point on an adjacent thread.
a) axial pitch c) lead
b) Z – pitch d) lead angle

1017. It is the angle between a tangent to the pitch helix and plane normal to the
axis
of screw.
a) helix angle c) tangent angle
b) lead angle d) vertical angle

1018. It is suggested that the design factor on the yield strength be about 1.5 for
the
smooth load, about 2 to 2.25 for minor shock loading, and up to ______ for severe
shock loads, especially when the loading reverse during operation.
a) 4.5 c) 3.0
b) 3.5 d) 4.0

1019. A key that are square or flat and tapered with head.
a) pin key c) saddle keys
b) gib-head key d) none of these

1020. A key that may either straight or tapered. It is usually a drive fit.
a) pin keys c) saddle keys
b) gib head keys d) none of these

1021. For involute spline, the type of fits used:

a) close fit c) press fit
b) sliding fit d) all of these

1022. A coupling that transmits power via the frictional forces induced by pulling
the flange toward each other over slotted tapered sleeves.
a) flanged coupling c) rigid coupling
b) ribbed compression coupling d) flanged compression coupling

1023. A coupling used for absorbing some shock and vibration that may appear on
one shaft and of preventing the occurrence of reversed stresses caused by the shaft
deflecting at the coupling.
a) rigid coupling c) flexible coupling
b) flange coupling d) none of these

1024. A bearing in which the radii of the journal and the bearing are the same.
a) fitted bearing c) partial bearing
b) full bearing d) clearance bearing

1025. The operating temperature of oil films in the bearing must approximately:
a) 140ºF to 150ºF c) 120ºF to 190ºF
b) 140ºF to 160ºF d) 140ºF to 190ºF

1026. At higher temperature, oil oxidizes more rapidly above:

a) 120ºF c) 140ºF
b) 200ºF d) 160ºF

1027. For thrust bearing, the speed at moderate operating condition is:
a) 50 < Vm >200 fpm c) 50 < Vm > 220 fpm
b) 50 < Vm > 250 fpm d) 50 < Vm > 240 fpm

1028. If the ends are joined by wire lacing with machine, the usual efficiency of joint
is:
a) 100% c) 85%
b) 75% d) 88%
1029. On high-speed centrifugal blowers, it has been observed that the arc of
contact
is reduced from 180º at rest to ______ in motion.
a) 100º c) 95º
b) 90º d) 110º

1030. For minimum quietness, use sprockets with ____ or more teeth.
a) 21 c) 25
b) 23 d) 27

1031. A wire rope that the wires and strands are twisted in the opposite direction.
a) long lay c) regular lay
b) perform d) lang lay