A line shaft is 2 15/16 in a diameter and will A flywheel of mass 500 kg and radius of gyration 1.

2
transmit 50 hp when turning at 200 rpm at constant m is running at 300 rpm. By means of a clutch, this
rate. This shaft furnishes the power to 10 machines flywheel is suddenly connected to another flywheel,
each requiring 5 hp to operate. Each of the 10 mass 2000 kg and radius of gyration 0.6 m, initially
pulleys is keyed to the shaft by standard flat key. at rest. Calculate their common speed of rotation
If the width and thickness of the key are ¾ and ½ after engagement.
respectively, find the length of the key based on A. 120 rpm
shear considering that the allowable shear stress B. 130 rpm
for commercial shafting is 6000 psi. C. 140 rpm
D. 150 rpm
Answer: L = 0.238 in
Answer: D
The torque to overcome frictional and other
resistances of a turbine is 317 N-m and maybe A set screw is necessary to fastened a pulley to a 2
considered as constant for all speeds. The mass of in. shaft while transmit 3 hp and rotates at 150
the rotating parts is 1.59 tons and the radius of rpm? What is the typical size of set screw in
gyration is 686 mm, if the steam is cut-off when the practice?
turbine is running free of load at 1920 rpm, find
the time it will take to come to rest. Answer: ½ in.
A. 474.5 s
B. 500.81 s An eccentric is to be connected to a 3-in. shaft by
C. 385.72 s a set screw. The center of the eccentric is 1 ¼ in.
D. 601.22 s from the center of the shaft when a tensile force of
1000 lb is applied to the eccentric rod
Answer: A perpendicular to the line of centers. What is the
holding force necessary if the factor of safety is
A line shaft is 2 15/16 in a diameter and will 6?
transmit 50 hp when turning at 200 rpm at constant
rate. This shaft furnishes the power to 10 machines Answer: 5000 lb
each requiring 5 hp to operate. Each of the 10
pulleys is keyed to the shaft by standard flat key. In a two ram hydraulic steering gear, the rams are
If the width and thickness of the key are ¾ and ½ 250 mm diameter, the rubber stock is 400 mm diameter
respectively, find the length of the key based on and the distance from center of rudder stock to
shear considering that the allowable shear stress center line of rams is 800 mm. Calculate the stress
for commercial shafting is 12,000 psi. in the rudder stock when the rudder is in mid-
position and the hydraulic pressure is 70 bar.
Answer: L = 0.357 A. 31.54 MPa
B. 42.76 MPa
C. 21.87 MPa
A cast iron pulley transmit 65.5 hp at 1750 rpm. The D. 16.24 MPa
1045 as-rolled shaft to which it is to be keyed is 1
¾ in. in diameter, key material, cold drawn 1020. Answer: C
Compute the length (based on shear) of flat and
square key needed if the 1 ¾ in. diameter has a A 12-in gear is mounted on a 2-in shaft and is held
width and thickness 3/8 and ¼ in. respectively. in place by a 7/16 in set screw. For a design factor
Note: Sy = 66 ksi (with Sys = 0.5 Sy = 33 ksi) and N of 3 what would be the tangential load that could be
= 1.5 for smooth loading. applied to the teeth if the holding force of a 7/16
in screw is 2500lb?
Answer: L = 0.327 in (for flat and square keys)
Answer: Tangential Load is 139 lb
A closely coiled helical spring is made of 6 mm
diameter steel wire, the mean diameter of the coil The cylinder head of a 10 in x 18 in Freon
is 60 mm and there are 8 coils. Taking the modulus compressor is attached by 10 stud bolts made of SAE
of rigidity as 100 kN/mm^2, find the stress in the grade 5. The cylinder pressure is 300 psi. What is
wire when carrying an axial load of 240 N. the force on each bolt?
A. 169.7 MPa
B. 184.5 MPa Answer: 1571 lb
C. 195.8 MPa
D. 641.7 MPa The cylinder head of a 10 in x 18 in Freon
compressor attached by 10 stud bolts made of SAE
Answer: A grade 5. The cylinder pressure is 300 psi. what size
of stud bolts should be used if SAE grade 5 (1/4” –
A set screw is necessary to fastened a pulley to a 2 ¾”) has the following stresses; Sp = 85 ksi, Sy = 88
in. shaft while transmits 3 hp and rotates at 150 ksi?
rpm? Find the torque on the set screw:
Answer: 0.2255 in2
Answer: 105.0 ft-lb
An air compressor is driven by a 7.5 HP electric
A s et screw is necessary to fastened a pulley to a motor with a speed of 1750 rpm with A-60 V-belts of
2 in. shaft while transmits 3 hp and rotates at 150 length 61.3 in. the pitch diameter of the small
rpm? Find the holding force if the factor of safety sheave is 110mm and the larger sheave is 200 mm.
is 3 (for steady loading). service factor is 1.2. determine the arc of contact.
A. 173.92 deg
Answer: 3780 lb B. 183.56 deg
C. 169.87 deg
D. 212.65 deg

Answer: C
A pulley 610 mm in diameter transmits 40 KW at 500 A man weighs himself in an elevator. When the
rpm. The arc of contact between the belt and the elevator is at rest he weighs 185 lbs: when the
pulley is 0.35 and the safe working stress of the elevator starts moving upwards, he weighs 210 lbs.
belt is 2.1 MPa. Find the tangential force at the how fast is the elevator accelerating, assuming
rim of the pulley in Newton. constant acceleration?
A. 2406 N A. 1 ft/sec2
B. 4321 N B. 2.17 ft/sec2
C. 2505 N C. 4.35 ft/sec2
D. 3321 N D. 9.81 ft/sec2

Answer: C Answer: C

A pulley 610 mm in diameter transmits 40 KW at 500 A copper column of annular cross section has an
rpm. The arc of contact between the belt and pulley outer diameter d2 of 15 ft and is subjected to a
is 144 degrees, the coefficient of friction between force of 45 kips. The allowable compressive stress
belt and pulley is 0.35 and the safe working stress is 300 lb/ft2. What should be the wall thickness?
of the belt is 2.1 and the safe working stress of A. 3
the belt is 2.1 MPa. What is the effective belt pull B. 3.52
in Newton. C. 4.59
A. 2505 N D. 5.03
B. 3031 N
C. 4528 N Answer: C
D. 2823 N

Answer: A What can the maximum load be on the column, if the

cross sectional area is 144 ft2 and the compressive
Two shafts are connected by spur gears. The pitch stress cannot exceed 200 lb/ft2?
radii of the gears A and B are 207 mm and 842 A. 20 kips
respectively. If the shaft a makes 350 revolutions B. 22 kips
per minute and is subjected to twisting moment of C. 28.8 kips
236 N.m what is the tooth pressure of the two gears? D. 30 kips
A. 1177 N
B. 1255 N Answer: C
C. 890 N
D. 878 N A 100 in long aluminum bar is subjected to tensile
stress of 25000 psi. Find the elongation (E=10x106
Answer: A psi)
A. 0.025 in
A machinist made two 8 DP spur gear to be mounted on B. 0.25 in
a center distance of 16 inches with speed ratio of 7 C. 0.45 in
to 9. The number of teeth in each gear are: D. 0.65 in
A. 100 teeth and 78 teeth
B. 120 teeth and 93 teeth Answer: B
C. 144 teeth and 112 teeth
D. 150 teeth and 117 teeth Of the following solid shaft diameters, which is the
smallest that can be used for the rotox of a 6 HP
Answer: C motor operating at 3500 rpm, if the maximum shear
stress for the shaft is 8500 psi?
Two helical gears transmit 500 HP at 3600 rpm. What A. 5/16 in
should be the bore diameter of each gear be if the B. 3/8 in
allowable stress in gear shafts is 12500 psi? C. ½ in
A. 1.252 in D. 1 in
B. 1.3275 in
C. 1.4568 in Answer: C
D. 1.5276 in
A cone clutch has an angle of 10 degrees and a
Answer: D coefficient of friction of 0.42. find the axial
force required if the capacity is 7.46 KW at 500
A thin hallow sphere of radius 10” and thickness rpm. The mean diameter of the active conical section
0.1” is subjected to an internal pressure of 100 is 300mm.
psig. The maximum normal stress on an element of the A. 0.40332 kN
sphere is B. 0.3928 kN
A. 5000 psi C. 0.2453 kN
B. 10000 psi D. 0.2384 kN
C. 7070 psi
D. 14140 psi Answer: B

Answer: A

A car of mass 2000 slugs accelerates in 10 seconds

from rest at a constant rate to a speed of 20
ft/sec. what is the resultant force on the car due
to this acceleration?
A. 1000 lbf
B. 2000 lbf
C. 3000 lbf
D. 4000 lbf

Answer: D
A band brake is installed on a drum rotating at a A simple beam, 48 in long, with a static load of
250 rpm, and a diameter of 900 mm. the angle of 6000 lbs at the center is made of C1020 structural
contact is 1.5 pi radians and one end of the brake steel. Based on the ultimate strength with Su = 65
band is fastened to a fixed pin while the other end ksi and factor of safety based on ultimate atrenght
to the brake arm 150 mm from the fixed pin. The = 4 (for C1020), determine the dimensions of the
coefficient of friction is 0.25 and the straight rectangular cross-section for h = 2b.
brake arm is 1000 mm long and is placed A. b = 1 7/8 and h = 3 3/4
perpendicular to the diameter bisecting the angle of B. b = 1 3/8 and h = 3 1/4
contact. Determine the net belt pull in kN applied C. b = 2 7/8 and h = 4 3/4
at the kilowatts is being absorved. D. b = 1 3/8 and h = 2 3/4
A. 4.24
B. 3.90 Answer: A
C. 4.0
D. 3.8
A 15/16 – in wide key has a depth of 5/8 in. it is
Answer: A 12 in long and is to be used on a 200 hp. 1160 rpm,
squirrel-cage induction motor. The shaft diameter is
A simple band brake has a 76 cm and fitted with a 3 7/8 in. the maximum running torque is 200% of the
steel band 2/5 cm thick lined with a brake lining full-load torque. Determine the maximum direct
having a coefficient of friction of 0.25. the arc of shearing stress on the shaft considering the effect
contact is 245 deg. the drum is attached to a 60 cm of the keyway.
hoisting drum that sustain a rope load of 820 kg. A. 5990 psi
the operating force has a moment arm of 1.50 m and B. 2990 psi
the band is attached 12 cm from the pivot point. C. 7290 psi
Find a torque just required to support the load D. 9920 psi
(clockwise)
A. 2413.26 N-m Answer: B
B. 3492.31 N-m
C. 2453.29 N-m A hallow bronze tube has an outer diameter of 2 in
D. 1894.82 N-m and an inner diameter of 1 ½ and is 12 in long. A
crank 15 in long is keyed to one end and the other
Answer: A end is held rigidly. The modulus of rigidity is
10000000 psi. what force must be applied to the end
An engine 40 kW at 1200 rpm, with a single plate of the crank to produce a torsional shear of 5000
clutch with two pairs of friction surfaces psi?
transmitting the power. Consider the coefficient of A. 835 lbs
friction to be a 0.30 and mean diameter of disc to B. 853 lbs
be 200 mm, determine the axial force required to C. 358 lbs
engine the clutch and transmit the power. D. 583 lbs
A. 4.832 kN
B. 5.305 kN Answer: C
C. 3.693 kN
D. 6.922 kN An occupant moves toward the center of a merry go
round at 6 m/s. if the merry go round rotates at
Answer: B 6rpm. Compute the acceleration component of the
occupant normal to the radius
The collar of the capstan has an outside diameter of A. 6.79
8 in and an inside diameter of 6 in the total load B. 8.29
supports is 2000 lb. if the coefficient of friction C. 7.54
is 0.1 what is the collar friction torque. D. 3.77
A. 705 in-lb
B. 802 in-lb Answer: D
C. 1012 in-lb
D. 972 in-lb Find the number of active coils of a No. 8 wire
Helical Spring index of 6, steady load with spring
Answer: A rate of 42.5 lb/in. maximum allowable stress is 60
ksi.
A disc clutch has a 6 pairs of containing friction A. 25
surfaces. The frictional radius is 2-in and the B. 28
coefficient of friction is 0.3. An axial force of C. 29
100 lb acts on the clutch. The shaft speed is 400 D. 22
rpm. How much horsepower can be the clutch transmit?
A. 2.28 hp Answer: A
B. 3.12 hp
C. 5.2 hp What type of brass that is used mostly for jewelry
D. 4.51 hp and articles to be gold-plated with the same
ductility as copper but of greater strength?
Answer: A A. Gilding Brass
B. Accessories Brass
C. Cartridge Brass
D. Red Brass

Answer: A
Which of the following is the Zinc alloys in the What should be net platform area of an elevator
Aluminum Alloy Designations by ASTM? design to carry a maximum rated load of 13600 kg?
A. Ax4xxx A. 21.42 m2
B. Ax3xxx B. 18.45 m2
C. Ax7XXX C. 30.42 m2
D. Ax8XXX D. 25.25 m2

Answer: C Answer: A

Ackenman steering gear is made up of If there are 860 person occupying the building other
A. Sliding and rotary pairs than the first floor, then how many elevators are
B. Turning pairs required?
C. Rolling pairs A. 6
D. Rolling and sliding pairs B. 8
C. 4
Answer: B D. 10

Answer: C
A motor car takes a bend of certain radius hand
direction when moving at some speed if engine The stiffness of a spring is 88 N/mm of axial
rotates in a clockwise direction when viewed from compression. Find the Joules of work to increase the
front, then because of centrifugal force compression from 50 mm to 80 mm.
A. Reaction on outside wheels is increased and on A. 201.2
inside wheels decreased B. 171.6
B. Reaction on inside wheels is increased and on C. 150.4
outside wheels decreased D. 230.5
C. Reaction on rear wheels is increased and on front
wheels decreased Answer: B
D. Reaction on rear wheels is decreased and on front
wheels increased Find the Joules of work to pull a roller of mass 50
kg a distance of 8 m up a gradient inclined at 6
Answer: A degrees to the horizontal neglecting resistances.
A. 340
The notch angle of the izod impact test specimen is B. 245
A. 20° C. 410
B. 10° D. 520
C. 30°
D. 45° Answer: C

Answer: D Manufactured from aluminum oxide have the same

expected life as carbide tools but can operate at
In Vicker’s hardness testing, the pyramid indentor speeds from two to three times higher. They operate
apex is below 1100C.
A. 40° A. Sintered carbides
B. 161° B. Diamonds
C. 136° C. Ceramic tools
D. 122° D. Cast nonferrous

Answer: A Answer: C

An elevator having a floor area of 18m2 has a A plain carbon steel with approximately 0.9 to 1.3%
minimum capacity of _____ persons carbon, which has been hardened and tempered.
A. 4 A. Carbon tool steel
B. 2 B. High-Speed steel
C. 6 C. Cast nonferrous
D. 8 D. Diamond

Answer: B Answer: A
Carbon tool steel can be given a good edge, but is
Find the maximum load in kgs of an elevator having a restricted to use below
net inside platform area of 10m2 A. 400 to 600 F
A. 5738 kgs B. 700 to 800 F
B. 5436 kgs C. 300 to 400 F
C. 1866.5 kgs D. 800 to 1000 F
D. 1567.4 kgs
Answer: A
Answer: A
Which of the following contains tungsten or chromium
and retains its hardness up to approximately 1100 F,
Find the maximum load in kgs of an elevator having a a property known as red hardness
net inside platform area of 4m2 A. Ceramic tools
A. 5738 kgs B. High speed steel
B. 5436 kgs C. Diamonds
C. 1866.5 kgs D. Carbon tool steel
D. 1567.4 kgs
Answer: B
Answer: C
Cast nonferrous tools are brittle but can be used up The diameter of the small pulley of a set of
to approximately differential pulley blocks is 130 mm. When lifting a
A. 1700 F load of 560 N, the effort required is 50 N and the
B. 2000 F efficiency is 40%. Find the diameter of the large
C. 2200 F pulley.
D. 600 F A. 170 mm
B. 140 mm
Answer: A C. 160 mm
D. 150 mm
Produced through powder metallurgy from nonferrous
metals Answer: B
A. Diamonds
B. Ceramic tools The pitch of the thread of a screw-jack is 8 mm and
C. Cast nonferrous the effective length of the toggle-bar is 380 mm. If
D. Sintered Carbides when lifting a load of 20kN, the work lost in
overcoming friction is 70%, find the effort applied
Answer: D at the end of the toggle.
A. 223.4 N
Sintered carbide operate at cutting speeds how many B. 155.4 N
times as fast as HSS tools C. 334.3 N
A. 2 to 5 D. 345.3 N
B. 5 to 7
C. thrice Answer: A
D. twice
Find the number of teeth in the worm-wheel of a worm
Answer: A driven screw jack to give a velocity ratio of 550 if
the worm is single threaded, the screw has pitch of
An engine is designed to develop 10kW of power at a 16 mm and the effort wheel is 100 mm diameter.
mean speed of 1000 rev/min. Find the moment of A. 26
inertia, in kg-m2, of a suitable flywheel, assuming B. 30
a speed variation of ± 1.5% of the mean speed and an C. 28
energy fluctuation equal to 0.9 of the work done per D. 24
revolution.
A. 1.612 kg-m2 Answer: C
B. 1.566 kg-m2
C. 2.014 kg-m2 A carbide milling cutter 250 mm in diameter is used
D. 2.333 kg-m2 to cut a block mild steel with a plain cutter. The
block is 500 mm long. If the feed is 0.50 mm/rev and
Answer: A depth of cut is 1.2 mm. determine the time required
to take one cut. The over travel is 16 mm. the
In a set of rope pulley blocks which has 3 pulleys cutting speed is 80 m/min.
in the top block and 2 in the bottom, an effort of A. 8.45 min
300 N is required to lift a load of 1.26 kN. Find B. 7.45 min
the velocity ratio. C. 9.45 min
A. 3 D. 10.45 min
B. 4
C. 2 Answer: D
D. 5
Answer: D The feed of an 8 tooth face mill cutter is 0.325 mm
There are four pulleys in each block of a set of per tooth at 200 rpm. The material cut is 300 BHN
rope pulley blocks. If the efficiency is 70% when steel. If the depth of cut is 3 mm and width is 100
lifting a load of 2.8 kN, what is the effort mm, calculate the power at the cutter.
applied? A. 10.24 hp
A. 300N B. 12.48 hp
B. 200N C. 11.62 hp
C. 400N D. 13.22 hp
D. 500N
Answer: B
Answer: D
Determine the power required for milling mild steel
The efficiency of a set of chain driven differential workpiece with a cutter of 80 mm diameter having 9
pulley blocks is 35% when lifting a load of 1.89kN. teeth and rotating at 120 rpm. The workpiece has a
If the large and small pulleys of the compound width of 60 mm. depth of cut is 4 mm and tooth load
sheave have 27 teeth respectively, find the effort is 0.03 mm.
required to lift this load. A. 1.2 kW
A. 300N B. 2.3 kW
B. 200N C. 1.9 kW
C. 400N D. 2.6 kW
D. 500N
Answer: C
Answer: A
A leather belt 6 inches wide by ¼ in thick running It is the process of separating a material into a
at 4000 ft/min connects 12 in and 60 in. in diameter specifically sized groups.
pulleys. The angles of contact are 270 deg. and 240 A. Centrifuging
deg. for small and large pulleys respectively. B. Fractioning
Coefficient of friction on large pulley is 0.4 on C. Sieving
small pulley 0.3. if the allowable tension is 100lb D. Screening
per in. determine the maximum horsepower that can be
transmitted without considering centrifugal force. Answer: B
A. 44 hp
B. 55 hp It is process in which metal is dipped in dilute
C. 33 hp acid solutions to remove dirt, grease, and oxides.
D. 66 hp A. Pickling
B. Polishing
Answer: B C. Sheradizing
D. Parkerizing
Determine the time required to turn a brass
component 50 mm diameter and 100 mm long at a Answer: A
cutting speed of 36 m/min. the feed is 0.4 and only
one cut is taken. Which of the following mechanism is used to change
A. 55 s the direction of an applied tensile force?
B. 75 s A. Gears
C. 45 s B. Pulleys
D. 65 s C. Flywheels
D. Ropes
Answer: D
Answer: B
A tool will cut for 4 hrs before it needs
sharpening. Determine the time charged to one cycle What is usually the loss factor for most wire ropes
if it takes 12 minutes to change the tool and tool and chains with 180° contact at low speeds?
can be sharpened 10 times before it is discarded. A. varies from 1.03 to 1.06
A. 2.2 min B. varies 1.07 to 1.10
B. 3.3 min C. varies 1.20 to 1.50
C. 1.2 min D. varies 1.60 to 1.80
D. 4.4 min
Answer: A
Answer: C
Which of the following is the method to determine
A tool life of 80 minutes is obtained at a speed of the reactions on continuous beams?
30 m/min and 8 minutes at 60 m/min. determine the A. two-moment equations
cutting speed for 4 minute tool life. B. second moment equations
A. 62 m/min C. three-moment equations
B. 82 m/min D. third moment equations
C. 72 m/min
D. 52 m/min Answer: C

Answer: B A machine component of mass 0.77 kg moves with

simple harmonic motion in a straight line and
Which of the following simple mechanical machine completes 175 oscillations per minute. Find the
with the ability to increase an applied force? accelerating force when the component is 50 mm from
A. Hinges mid-travel.
B. Lever A. 11.65 N
C. Roller B. 12.93 N
D. Spring C. 10.44 N
D. 13.22 N
Answer: B
Answer: B
Which of the following devices that is mainly used
to raise or lower an object? What load in Newton must be applied to 25 mm round
A. Hoist steel bar 3.0 m long to stretch the bar 1.3 mm?
B. Lever A. 42,056
C. Spring B. 52,840
D. Roller C. 55,016
D. 44,031
Answer: A
Answer: D
What is term applied to the process of separating
different sizes of the same material? In LRT II project steel railroad rails of 10 m long
A. Screening are to be installed. If the lowest temperature
B. Separation considered is 20 deg C and a maximum temperature of
C. Sieving 36 deg C is designed for, and the modulus of
D. Fractioning elasticity of steel to be 207,000 MPa. Determine the
clearance between rails such that adjoining rail
Answer: C will just touch at maximum design temperature.
A. 2.34
B. 2.32
C. 3.41
D. 1.86

Answer: D
What pressure is required to punch a hole 3 in. In bolts design, the quotient of the proof load and
diameter through a ¼ in. steel plate? the tensile – stress area is called
A. 45 tons A. proof strength
B. 20 tons B. yield strength
C. 30 tons C. section modulus
D. 40 tons D. modulus of resilience

Answer: A Answer: A

A steel tie rod on bridge must be made to withstand In bolts design, proof strength corresponds
a pull of 600 lbs. find the diameter of the rod approximately how many percent of the 0.2 percent
assuming a factor of safety of 5 and ultimate stress offset yield strength.
of 64,000 psi. A. 85%
A. 0.705 in B. 95%
B. 0.891 in C. 90%
C. 0.809 in D. 45%
D. 0.773 in
Answer: C
Answer: D
What type of brass that is usually to form tubing or
An engine parts is being tested with a load of 30000 piping to carry hot water in such application of
lb. the allowable tensile stress is 10000 psi, radiators or condenser?
modulus of elasticity of 40x106 psi. If the original A. Red brass
length of specimen is 42 inches with elongation not B. Commercial brass
exceeding 0.0015 in, what diameter of the specimen C. yellow brass
is rejected? D. cartridge brass
A. 4.2 in
B. 3.0 in Answer: A
C. 2.5 in
D. 5.17 in It is in widespread use for the numbering system for
cast iron by ASTM (American Society for Testing and
Answer: D Materials), then this system is based on which of
the following?
A steel rod 75 in long with a cross sectional area A. Bearing strength
of ¼ in2 is held vertically firm at one end while a B. Compressive strength
load of 3000 lb is suspended from the other end. If C. axial strength
the rod stretches 0.025 in, find the modulus of D. tensile strength
elasticity of the steel.
A. 36x106 psi Answer: D
B. 11.5x106 psi
C. 30x106 psi In casting, brass, bronze, steel, gray iron and
D. 27x106 psi aluminum are most often used materials. What is the
minimum wall thickness for of the aforementioned
Answer: A materials used in casting?
A. 5 mm
In practice and theory as well, what is the allowed B. 10 mm
permissible misalignment in cylindrical and tapered C. 7 mm
roller bearings? D. 3 mm
A. 0.005 rad
B. 0.006 rad Answer: A
C. 0.001 rad
D. 0.003 rad A rectangular key was used in a pulley connected to
a line shaft with a power of 8 KW at a speed of 1200
Answer: C rpm. If the shearing stress of the shaft and key are
30 N/mm2 and 240 N/mm2 respectively. What is the
In practice and theory as well, the misalignment of diameter of the shaft?
spherical bearings should not exceed how many A. 22.2mm
radians? B. 21.7mm
A. 0.0087 rad C. 25.8mm
B. 0.0065 rad D. 30.2mm
C. 0.0041 rad
D. 0.0043 rad Answer A

Answer: A A line shaft with a power of 150 kW at a speed of

1200 rpm, had a rectangular key used used in its
pulley connection. Consider the shearing stress of
the shaft to be 40 N/mm2 and the key to be 200 N/mm2,
What term is used to described a maximum load that a determine the shaft diameter.
bolt can withstand without acquiring a permanent A. 66.62mm
set? B. 53.31mm
A. live load C. 40.62mm
B. dead load D. 44.94mm
C. proof of load
D. ultimate load Answer B

Answer: C
A cylinder having an internal diameter of 20 in and A brass with 40% zinc, or same composition as muntz
an external diameter of 36 in is subjected to an metal except for the addition of 0.75% tin that
internal pressure of 10000 psi and an external contributes to the corrosion resistance of this
pressure of 2500 psi. Determine the hoop stress at material.
the inner surface of the cylinder. A. naval brass
A. 24,705.16 psi B. bronze
B. 19,028.52 psi C. cartridge brass
C. 13,142.86 psi D. admiralty
D. 11,696.43 psi
Answer: A
Answer D
High pressure vessels and pipes carrying high
A thin walled cylindrical pressure vessel is pressure fluids develop which of the following
subjected to internal pressure which varies from 750 stresses?
kPa to 3550 kPa continuously. The diameter of the A. tangential stress only
shell is 150 cm. Find the required thickness of the B. radial stress only
cylinder wall based on yield point of 480 MPa net C. bearing and stress only
endurance limit of 205 MPa and a factor of safety D. both radial and tangential stress
2.5.
A. 21.2 mm Answer: C
B. 22.22 mm
C. 23.83 mm For the rotating elements like flywheels and
D. 20.72 mm blowers, the analysis of stresses will be based
similar on which of the following theory?
Answer: A A. thin-walled cylinder
B. thick-walled cylinder
A compression ring is to be used at the junction of C. radial ball bearing
a conical head and shell. Determine the required D. rotating shaft member
area of the compression ring if the pressure is 50
psi and the stress is 13750 psi. Assume efficiency Answer: B
of the joint is 80%
A. 0.00715 d2 For thin-walled pressure vessels, which of the
B. 0.00482 d2 following statements is correct of the stresses?
C. 0.00721 d2 A. Radial stresses is quite small as compared with
D. 0.00682 d2 the tangential stress
B. Radial stresses is quite bigger as compared with
Answer: A the tangential stress
C. Radial stresses is same as tangential stress
A cylindrical vessel measuring (2ft x 5ft) holds a D. Only radial stress is present and no tangential
gas at 3000 psi, using stainless steel OQT 12000 stress
determine the thickness of the plate with a design
factor of 1.4 yield. Assume efficiency of welded Answer: A
joint as 85%
A. 0.549 in How do you call the ratio of lateral strain to
B. 0.455 in longitudinal strain?
C. 1.2 in A. Poisson’s ratio
D. 0.3 in B. Modulus of resilience
C. Modulus of rigidity
Answer: A D. Offset ratio

Which of the following is considered to be the Answer: A

lightest of all commercial metals and is used in
aircraft industry? If a shaft 250 mm diameter can safely transmit 1860
A. titanium kw of power when running at 125 rpm, calculate the
B. chromium power that can be safely transmittted by a shaft 375
C. magnesium mm diameter when running at 80 rpm, assuming the
D. aluminum shafts are of similar material.
A. 4018 kw
Answer: C B. 5063 kw
C. 3085 kw
Brass with 40% zinc are called ____ D. 3567 kw
A. muntz metal
B. bronze Answer: A
C. yellow brass
D. admiralty metal The pinion shaft of a double reduction geared
turbine is 140 mm diameter, runs at 3000 rpm and the
Answer: A stress in it is 48 MN/m2. The main shaft is 445 mm
diameter and runs at 90 rpm. Assuming that the same
How do you call a brass that contains 28% zinc, 1% power is transmitted by both shafts, find the stress
tin and very excellent corrosion resistance in the main shaft.
especially in saltwater. A. 50 mpa
A. muntz metal B. 40 mpa
B. bronze C. 60 mpa
C. yellow brass D. 30 mpa
D. admiralty metal
Answer: A
Answer: D
A torsion-meter on a tunnel shaft 360 mm diameter Strain energy is a measure of
registers an angle of twist of 0.3 degree over a
length of 2.5 m when running at 115 rpm. Taking the A. the ratio of ultimate failure strain to yielding
modulus of rigidity of the shaft material as 93 strain
GN/m2, find the power transmitted. B. energy per unit volume stored in a deformed
A. 4.67 mw material
B. 3.45 mw C. total plastic strain at failure
C. 3.89 mw D. strain energy per unit volume to reach the yield
D. 5.44 mw point

Answer: C Answer: B

Find the diameter of the coupling bolts to connect All of the following are hardness test except
shafts which are to transmit 3000 kw when running at A. brinnel test
100 rpm if 8 bolts are to be fitted on a pitch B. rockwell test
circle diameter of 610 mm and allowing stress of 38 C. meyuer – vickers test
MN/m2 in the bolts. D. charpy test
A. 65.74 mm
B. 62.72 mm Answer: D
C. 55.44 mm
D. 52.45 mm Most metallic crystals form one of the following
three lattice structures
Answer: B A. hexagonal close-packed, simple tetragonal, or
cubic
A tensile stress of 8000 psi and a shear stress of B. base-centered orthorombic, body-centered
4000 psi are induced in a brittle material whose orthorombic, or rhombohedral
working strength in straight tension is 10000 psi C. body-centered cubic, face-centered cubic, or
what is the maximum tensile stress? hexagonal close-packed
A. 6000 psi D. simple tetragonal, body-centered tetragonal, or
B. 9656 psi body-centered cubic
C. 11400 psi
D. 10876 psi Answer: C

Answer: B The planes of a crystalline lattice can be specified

by
A certain point in a material has the folllowing A. burger’s vectors
stresses; a tension of 4000 psi and a tension of B. taylor-orowan dislocations
2000 psi. At another point in the same material are C. fick’s law
a tension of 8000 psi; a compression ratio of 4000 D. miller indices
psi and a tension of 3000 psi. Determine the maximum
shear stress at the two points. Answer: D
A. 4300 psi and 9440 psi
B. 2400 psi and 8450 psi Either the upper of the lower deviation, depending
C. 5300 psi and 10440 psi on which is closer to the basic size
D. 3300 psi and 9005 psi A. fundamental deviaton
B. upper deviation
Answer: C C. lower deviation
D. tolerance
Resilience (elastic toughness) is a measure of
A. energy per unit volume stored in a deformed Answer: A
material
B. total plastic strain and failure Which of the following statements is false?
C. strain energy per unit volume to reach the yield A. there is a considerable increase in the hardness
point and the strength of a cold-worked metal
D. strain energy (work per unit volume) to cause B. cold-working a metal significantly reduces its
fracture ductility
C. cold-working causes a slight decrease in the
Answer: C density and electrical conductivity of a metal
D. cold work decrease the yield point as well as the
Toughness is a measure of strength and hardness of the metal

A. the ratio of ultimate failure strain to yielding Answer: D

strain
B. energy per unit volume stored in a deformed Which of the following statements is false?
material A. hot-working can be regarded as the simultaneous
C. strain energy per unit volume to reach the yield combination of cold-working and annealing
point B. hot-working increases the density of the metal
D. strain energy (work per unit volume) to cause C. one of the primary goals of hot-working is to
fracture produce a fine-grained product
D. hot-working causes much strain hardening of the
Answer: D metal

Answer: D
Which of the following statements is false? Taylor’s equation relates cutting speed v and tool
A. high-strength low alloy steels are not as strong life T for particular combination of tool and
as non alloy low carbon steels workpiece, VTn = constant. This equation is also
B. small amounts of copper increase the tensile known as
strength of steels A. flank wear
C. small amounts of silicon 1 steel have little B. crater wear
influence on toughness or fabricability C. nose failure
D. additions of small amounts of silicon to steel D. tool life
can cause a marked decreased in yield strength of
the steel Answer: D

Answer: D After any cutting or standard grinding operation,

the surface of a workplace will consist of
A round billet made of 70-30 brass with extrusion A. smear metal
constant of 35000 psi is extruded at a temperature B. superfinishing
of 675 C. The billet diameter is 5 in. And the C. ultrafinishing
diameter of the extrusion is 2 in. Calculate the D. centerless ginding
extrusion force required.
A. 6.6 MN Answer: A
B. 5.5 MN
C. 7.7 MN A method that does not require clamping, chucking or
D. 4.4 MN holding roun workpieces.
A. centerless grinding
Answer: B B. chemical millling
Determine the machining time to drill a hole of 20 C. laser machining
mm diameter in a workpiece 25 mm thick by a drill at D. ultrafinishing
a cutting speed of 30 m/min with a feed of 0.2
mm/rev. Answer: A
A. 17.6 s
B. 14.5 s Uses high energy electrical discharges to shape
C. 19.5 s electrically conducting workpiece
D. 22.9 s A. electrochemical machining
B. electrical discharge machining
Answer: C C. electrochemical grinding
D. ultrasonic grinding
A weight of 160 lbs falls from a height of 2.5 ft to
the center of a horizontal platform mounted on four Answer: B
helical springs. At impact each spring deflects 3
in. Calculate the wire diameter if the maximum For common brass tools, wear ratios for the tool and
design stress is 60,000 psi and spring index of 5. workpiece vary between
A. 0.5 in A. 4:1
B. 0.8 in B. 10:1
C. 0.57 in C. 20:1
D. 0.88 in D. 8:1

Answer: A Answer: C

A cantilever spring is composed of six graduated For expensive tool materials, wear ratios for the
leaves each 2 in. Wide and 3/8 in thick. Determine tool and workpiece vary between
the deflection if loaded with 1600 lbs at the tip. A. 4:1
Length of springs is 27 in. B. 10:1
A. 8 C. 20:1
B. 12 D. 8:1
C. 10
D. 6 Answer: A

Answer: C Removes heat by electrolysis in a high current

deplation operation
A 5 ton load is supported by a ½ in by 1 ½ in A. electrochemical machining
rectangular wire coil spring with 6 effective coils, B. electrospark machining
3 in outside diameter. C. electronic erosion
A. 1.24 in D. electrical discharge machining
B. 1.37 in
C. 2.34 in Answer: A
D. 2.75 in
Also known as electrolytic grinding
Answer: B A. laser grinding
B. ultranic grinding
A load of 10,000 lb is to be raised by a short jack. C. electrochemical grinding
The scew has a n outside diameter of 2 ½ in and am D. chemical milling
ACME single thread of two turns per in, if the
coefficient of friction is 0.2 determine the torque Answer: C
required to raise the load.
A. 600 in-lb
B. 400 in-lb
C. 800 in-lb
D. 500 in-lb

Answer: C
Determine the width of the leaves of a six-leaf The helical and herringbone gear teeth cut after
steel cantilever spring 13 in. Long to carry a load heat treatment should have a hardness in the range
of 375 lb with a deflection of 1 ¼ in. The maximum of 210/300 BHN. The pinion gear teeth hardness on
stress in this spring is limited to 50,000 psi. the other hand, ideally/normally be at how many BHN?
A. 2.01 in. A. 250/320
B. 2.54 in. B. 400
C. 1.93 in. C. 350/380
D. 1.54 in D. 340/350

Answer: C Answer: D

A coupling consisting of two circular plates welded As a rule the center to center distance between
to the ends of two shafts is to be designed using sprocket shoul not be less than how many times the
2.54 cm diameter bolts to connect one plate to the diameter of the bigger sprocket and not less than 30
other. The bolts are to be located at a distance of times the pitch nor more than about 50 times to
0.1524 m from the axes of the shafts. If the pitch.
coupling is to transmit 4026.8 kw at a shaft speed A. 1.5
of 1200 rpm, how many bolts should be used in the B. 2.5
coupling if the allowable shear stress for the bolts C. 2
is 103.43 Mpa? D. 3
A. two
B. three Answer: A
C. four
D. five It is the resulting cross-sectional area of the
tensile test specimen divided by the specimen
Answer: C original area.
A hollow steel shaft 2.54 m long is to be designed A. charpy ratio
to transmit a torque of 33,900 kJ. The shear modulus B. percentage impact
of elasticity, G = 82,740 Gpa for steel. The total C. % elongation
angle of twist in the length of the shaft must not D. izod ratio
exceed 6 deg. And the stress in the shaft must not
exceed 110.32 Mpa. What would be the ratio of the Answer: C
outside diameter to inside diameter?
A. 1.92 SAE 51XXX belongs to what steel family?
B. 1.74 A. carbon
C. 1.56 B. manganese
D. 1.38 C. chromium
D. nickel
Answer: D
Answer: C
A brake shoe is pressed against the surface of a
25.4 cm diameter drum rotating at 1250 rpm with a A four bar mechanism in which one of the links can
force of 111.20 N. If the coefficient of friction perform a full rotation relative to the other three
between drum and cylinder is 0.21, what power is links
dissipated in the form of heat by the drag of the A. geneva mechanism
brake shoe? B. crossover-position mechanism
A. 388.2 W C. triple rocker mechanism
B. 394.9 W D. grashof of mechanism
C. 401.6 W
D. 408.8 W Answer: D

Answer: A A grashof four bar mechanism in which the shorted

link is the frame or the fixed link and the other
Aluminum bolts 2 cm in diameter and 500 cm long are two cranks completely rotate with their axes.
used to hold the head on a pressure vessel. One bolt A. drag-link mechanism
has a sensitive extensometer attached to the body of B. crank-rocker mechanism
the bolt. It measures an elongation of 0.00400 mm in C. double-rocker mechanism
a ten-cm length of the bolt when it is tightened. D. triple-rocker mechanism
How much force is exerted by the bolt?
A. 8670 N Answer: A
B. 8770 N
C. 8870 N Which micrometer has no anvil?
D. 8970 N A. outside micrometer
B. screw thread micrometer
Answer: A C. depth micrometer
D. digit micrometer
Two masses of 100 kg are suspended by wires that are Answer: C
five mm in diameter. One wire is of aluminum and the
other is of steel. The wires are ten meters long. The ends of a cylindrical pressure vessel of 900 mm
How much lower will the mass held by the aluminum internal diameter are hemispherical and constructed
wire be? of plates 20 mm thick. Find the stress in the
A. 4.37 mm hemispherical ends when the internal pressure is 28
B. 4.87 mm bar (28x10^5 N/m^2).
C. 5.37 mm A. 35.1 MPa
D. 5.87 mm B. 25.4 MPa
C. 31.5 MPa
Answer: B D. 24.5 MPa

Answer: C
The shell plates of a boiler 4.5 m diameter are 42
mm thick and the tensile strength of the material is A specific method of inc galvanizing in which parts
495 MN/m^2. The efficiency of the longitudinal seams are tumbled in zinc dust at high temperatures
is 85% and that of the circumferential seams 85 %. A. sheradizing
Find the working pressure allowing a factor of B. polishing
safety of 5. C. super finishing
A. 2.66 MPa D. pickling
B. 1.57 MPa
C. 1.66 MPa Answer: A
D. 3.14 MPa
A hot-dip or electroplate application of tin to
Answer: B steel
A. tin-plating
A beam of regular rectangular cross-section is 64 B. organic finishes
mm broad, 100 mm deep and 1.6 m long. It is simply C. metal spraying
supported at each end and carries a concentrated D. lapping
load of 10 kN at its mid-length. Neglecting the
weight of the beam, find the maximum stress in the Answer: A
material.
A. 35.7 MPa A zinc coating applied to low carbon steel to
B. 57.3 MPa improve corrossion resistance. The coating can be
C. 53.7 MPa applied in a hot dip bath, by electroplating or by
D. 37.5 MPa dry tumbling (sheradizing)
A. parkerizing
Answer: D B. hard surfacing
C. honing
A cantilever of rectangular section is 100 mm broad D. galvanizing
by 150mm deep and carries a concentrated load of 15
kN at its free end. Neglecting the weight of the Answer: D
beam, find the distance from the free end where the
stress at the outer fiber is 75 MN/m^2. The diffusing of aluminum into a steel surface,
A. 1.875 m producing an aluminum oxide that protects the steel
B. 0.875 m from high-temperature corrossion.
C. 2.785 m A. electroplating
D. 3.785 m B. burnishing
C. calorizing
Answer: A D. buffing

A shaft 120 mm diameter is 1.6 m long and its mass Answer: C

is 102 kg concentrated load of 20 kN is hung at the
center of length. Find the maximum stress in the An electroplating-acid bath oxidation process for
shaft. aluminum and magnesium. The workpiece is the anode
A. 32.67 MPa in the electrical circuit.
B. 44.53 MPa A. abrasive cleaning
C. 48.32 MPa B. barrel finishing
D. 36.45 Mpa C. tumbling
D. anodizing
Answer: C
Answer: D
Find the twisting moment in a solid shaft 125 mm
diameter when the angle of twist is 0.5 degree on a Brittle materials produce discrete fragments, known
length of 1.8 m, the modulus of rigidity of the as
shaft material being 93 GN/m^2 A. chip breaker grooves
A. 12.9 KNm B. non-segmented chips
B. 11.4 KNm C. discontinuous chips
C. 10.8 KNm D. type-two chips
D. 13.9 KNm
Answer: C
Answer: C
Which of the following terms is used to descry
A hollow shaft is 400 mm diameter outside and 250 mm punch-pressed operations like forming, blanking
diameter inside and transmits a torque of 480KNm. shallow drawing and coining?
Calculate the angle of twist over a length of 7.5 m. A. stamping
Take G=92.5 GN/m^2 B. heading
A. 1.05 deg C. roll treading
B. 1.66 deg D. spinning
C. 2.01 deg
D. 2.55 deg Answer: A

Answer: A Which of the following is the effect of cold rolling

and cold drawing in mechanical properties?
All of the following are crystalline point defects A. both have the same effect
except B. cold rolling is better than cold drawing
A. schottky defects C. cold drawing is better than cold rolling
B. interstitial impurity atoms D. both have no effect
C. screw dislocations
D. vacancies Answer: A

Answer: C
Which of the following processes produce a refined What would be the weight of a flywheel in kg if the
grain structure and eventually increased strength weight of the rim is 3 times the sum of the weight
and ductility of the material? of the hub and arms. Given the outside diameter and
A. extrusion inside diameter to be 24 in and 18 in respectively
B. cold working and the rim width is 4.5 in. (assume steel flywheel)
C. forging A. 140.95 kg
D. hot rolling B. 160.95 kg
C. 200.95 kg
Answer: C D. 152.95 kg

The S30200 is usually called and 18-8 stainless Answer: D

steel, which means 8% of what?
A. chromium A cast iron flywheel with a mean diameter of 36
B. nickel inches changes speed from 300 rpm to 280 while it
C. carbon gives up 8000 ft-lb of energy. What is the
D. manganese coefficient of fluctuation.
A. 0.069
Answer: B B. 0.015
C. 0.082
It is a supersaturated solid solution of carbon in D. 0.020
ferrite and it is the hardest and strongest form of
steel? Answer: A
A. bainite
B. ferrite A sheet metal working company purchase a shearing
C. martensite machine from a surplus dealer without a flywheel. It
D. lignite is calculated that the machine will use 2380 joules
of energy to shear a 1.2 mm thick sheet metal. The
Answer: C flywheel to be used will have a mean diameter of
91.44 cm with a width of 25.4 cm. The normal
Which of the following processes usually used to operating speed is 180 rpm and slows down to 160 rpm
create a bar of material of a particular shape and during the shearing process. Assuming that the arms
dimensions? and the hub will account for 12% of the rim weight
A. extrusion concentrated at the mean diameter and that the
B. cold working material density is 0.26 lb/cu. In. Compute for the
C. forging weight of the flywheel.
D. hot rolling A. 296 kg
B. 306 kg
Answer: D C. 347 kg
D. 385 kg
The G10400 is a plain carbon steel with a carbon
content of which of the following? Answer: B
A. 0.37 to 0.44 %
B. 0.21 to 0.54 % A 48 in diameter spoked steel flywheel having a 12
C. 0.25 to 0.57 % in wide x 10 in deep rim rotates at 200 rpm. How
D. 0.34 to 0.54 % long a cut (in inches) can be stamped in one inch
thick aluminum plate if utimate shearing strength of
Answer: A the aluminum is 40,000 lb/in^2. During stamping, the
force exerted by the stamp varies from a maximum F
The S30200 is usually called and 18-8 stainless lb at the point of contact to zero lb when the stamp
steel, which means 18% of what? emerges from the metal. Neglect the weight of the
A. chromium flywheel and spokes and use 0.28 lb/in^3 density for
B. nickel flywheel material.
C. carbon A. 43.2 in
D. manganese B. 41.1 in
Answer: A C. 44.5 in
D. 35.9 in
A shearing machine requires 150 kg m of energy to
shear a steel sheet, and has a normal speed of 3.0 Answer: B
rps, slowing down to 2.8 rps during the shearing
process. The flywheel of the machine has a mean A shearing machine requires 150 kg m of energy to
diameter of 75 cm and weighs 15.5 kg/cm^3. The width shear a steel sheet, and has a normal speed of 3.0
of the rim is 30 cm. If the hub and arms of the rps, slowing down to 2.8 rps during the shearing
flywheel account for 15% of its total weight, find process. The flywheel of the machine has a mean
the thickness of the rim in cm. diameter of 75 cm and weighs 15.5 kg/cm^3. The width
A. 0.00487 cm of the rim is 30 cm. If the hub and arms of the
B. 0.00432 cm flywheel account for 15% of its total weight, find
C. 0.00363 cm the thickness of the rim in cm.
D. 0.00482 cm A. 0.00487 cm
Answer: C B. 0.00432 cm
C. 0.00363 cm
In a shearing machine the energy is 29,264 ft-lb, D. 0.00482 cm
the ultimate shearing stress of the steel plate is
40,000 psi, the plate thickness is 1 inch the length Answer: C
of the plate which can be sheared is:
A. 7055 in
B. 10.55 in
C. 12.75 in
D. 17.56 in
Answer: D
High pressure vessels and pipes carrying high
pressure fluids develop which of the following 2. The feed of an 8 tooth face mill cutter is
stresses? 0.325 mm per tooth at 200 rpm. The material
A. tangential stress only
cut is 300 BHN steel. If the depth of cut is
B. radial stress only
C. bearing stress only 3 mm and width is 100 mm, calculate the
D. both radial and tangential stress power at the cutter.
a. 10.24 hp
Answer: C b. 12.48 hp
c. 11.62 hp
d. 13.22 hp
For the rotating elements like flywheels and
blowers, the analysis of stresses will be based
similar on which of the following theory? Ans: B
A. thin-walled cylinder
B. thick-walled cylinder 3. Determine the power required for milling a
C. radial ball bearing mild steel work piece with a cutter of 80 mm
D. rotating shaft member diameter 9 teeth and rotating at 120 rpm.
The work piece has a width of 60 mm. depth
Answer: B
of cut is 4 mm and tooth load is 0.03 mm
a. 1.2 kW
For thin walled pressure vessels, which of the b. 2.3 kW
following statements is correct of the stresses? c. 1.9 kW
A. radial stresses is quite small as compared with d. 2.6 kW
the tangential stress
B. radial stresses is quite bigger as compared with
Ans: C
the tangential stress
C. radial stresses is same as tangential stress
D. only radial stress is present and no tangential 4. A leather belt 6 inches by ¼ in. thick
stress running at 4000 ft/min. connects 12 in and
60 in. in diameter pulleys. The angles of
Answer: A contact are 270 deg. And 240 deg for small
and large pulleys respectively. Coefficient
of friction on large pulley is 0.4 on small
How do you call the ratio of lateral strain to
longitudinal strain? pulley 0.3. if the allowable tension is 100
A. poisson’s ratio lb per in. determine the maximum horsepower
B. modulus of resilience that can be transmitted without considering
C. modulus of rigidity centrifugal force.
D. offset ratio a. 44 hp
b. 55 hp
Answer: A
c. 33 hp
d. 66 hp
How do you call a brass that contains 28% zinc, 1%
tin and very excellent corrosion resistance Ans: B
especially in saltwater.
A. muntz 5. Determine the time required to turn a brass
B. bronze
component 50 mm diameter and 100 mm long at
C. yellow brass
D. admiralty metal a cutting speed of 36 m/min. the feed is 0.4
and only one cut is taken.
Answer: D a. 2.2 min
b. 3.3 min
c. 1.2 min
d. 4.4 min
1. A carbide milling cutter 250 mm in diameter
is used to cut a block mild steel with a
Ans. C
plain cutter. The block is 500 mm long. If
the feed is 0.50 mm/rev and depth of cut is
1.2 mm, determine the time required to take
one cut. The over travel is 16 mm. the
6. A tool will cut for 4 hrs before it needs
cutting speed is 80 m/min.
sharpening. Determine the time charged to
a. 8.45 min
one cycle if it takes 12 minutes to change
b. 7.45 min
the tool can be sharpened 10 times before it
c. 9.45 min
is discarded.
d. 10.45 min
a. 62 m/min
b. 82 m/min
Ans: D
c. 72 m/min
d. 52 m/min

Ans. B
7. Which of the following simple mechanical 14. Which of the following is the method to
machine with the ability to increase an determine the reactions on continuous beams?
applied force? a. two-moment equations
a. Hinges b. Second moment equations
b. Lever c. three-moment equations
c. Roller d. third moment equations
d. Spring
Ans: C
Ans: B
15. A machine component of mass 0.77 kg moves
8. Which of the following devices that is with simple harmonic motion in a straight
mainly used to raise or lower an object? line and completes 175 oscillations per
a. Hoist minute. Find the accelerating force when the
b. Lever component is 50 mm from mid-travel.
c. Spring a. 11.65 N
d. Roller b. 12.93 N
c. 10.44 N
Ans: A d. 13.22 N

9. What is term applied to the process of Ans: B

separating different sizes of the same
material? 16. What load in Newton must be applied to a 25
a. Screening mm round steel bar 3.0 m long to stretch the
b. Separation bar 1.3 mm?
c. Sieving a. 42,056
d. Screening b. 52,840
c. 55,016
Ans:C d. 44,031

10. It is the process of separating a material Ans: D

into a variety of specifically sized groups.
a. Centrifugal 17. In the LRT II project steel railroad rails of 10
b. Fractioning meters long are to be installed. If lowest
c. Sieving temperature considered is 20 deg. C and a maximum
d. Screening temperature of 36 deg C is designed for, and the
modulus of elasticity of steel to be 207,000 Mpa,
Ans: B determine the clearance between the clearance
between rails such that adjoining rail will just
11. It is process in which metal is dropped in touch at maximum design temperature.
dilute acid solutions to remove dirt, a. 2.34
grease, and oxides. b. 3.32
a. Pickling c. 3.41
d. 1.86
b. Polishing
c. Sheradizing Ans: D
D. Pakerizing
18. What pressure is required to punch a hole 3 in.
Ans: A diameter through a ¼ in. steel plate?
a. 45 tons
12. Which of the following mechanism is used to b. 20 tons
c. 30 tons
change the direction of an applied tensile
d. 40 tons
force?
a. Gears Ans: A
b. Pulleys
c. Flywheels
d. Ropes 19. A steel tie rod on bridge must be made to
withstand a pull of 6,000 lbs. find the diameter of
the rod assuming a factor of safety of 5 and
Ans: B ultimate stress of 64,000 psi.
13. What is usually the lose factor for most a. 0.705 in
wire ropes and chains with contact at b. 0.891 in
low speeds? c. 0.809 in
A. varies from 1.03 to 1.06 d. 0.773 in
B. varies 1.07 to 1.10
Ans: D
C. varies from 1.20 to 1.50
D. varies from 1.60 to 1.80

Ans: A
20. An engine parts is being tested with a load of 27. In bolts design, the quotient of the proof load
30,000 lb. the allowable tensile stress is 10,000 and the tensile-stress area is called
psi, modulus of elasticity of 40 psi. If the a. proof strength
original length of specimen is 42 inches with b. yield strength
elongation not exceeding 0.0015 inch, what diameter c. section modulus
of the specimen is required? d. modulus of resilience
a. 4.2 in
b. 3.0 in Ans: A
c. 2.5 in
d. 5.17 in 28. In bolts design, proof strength corresponds
approximately how many percent of the 0.2 percent
Ans: D offset yield strength?
a. 85%
21. A steel rod 75 inches long tested with a load of b. 95%
3000 lb is suspended from the other end. If the rod c. 90%
stretches 0.025 inches, find the modulus of d. 45%
elasticity of the steel.
a. 36 psi Ans: C
b. 11.5 psi
c. 30 psi 29. What type of brass that is usually used to form
tubing or piping to carry hot water in such
d. 27 psi
application of radiators or condenser?
a. Red brass
Ans: A
b. Commercial brass
c. Yellow brass
22. Considered is 20 deg C and a maximum temperature
d. Cartridge brass
of 30 deg C is designed for, and the modulus of
elasticity of steel to be 207,000 Mpa, determine the
Ans: A
clearance between rails such that adjoining rail
will just touch at maximum design temperature.
30. It is in widespread use for the numbering system
a. 2.34
for cast iron by ASTM (American Society for Testing
b. 2.32
and Material), then this system is based on which of
c. 3.41
the following?
d. 1.86
a. Bearing Strength
b. Compressive Strength
Ans: D
c. Axial Strength
d. Tensile Strength
23. What pressure is required to punch a hole 3 in.
diameter through a ¼ in. steel plate?
Ans: D
a. 45 tons
b. 20 tons
31. It casting, brass, bronze, steel, gray iron and
c. 30 tons
aluminum are most often used materials. What is the
d. 40 tons
minimum wall thickness for of the aforementioned
materials used in casting?
Ans: A
a. 5mm
b. 10mm
24. In practice and theory as well, what is the
c. 7 mm
allowed permissible misalignment in cylindrical and
d. 3 mm
tapered roller bearings?
a. 0.005 rad
Ans: A
b. 0.006 rad
c. 0.001 rad
32. A rectangular key was used in a pulley connected
d. 0.003 rad
to a line shaft with a power of 8 kw at a speed pf
1200 rpm. If the shearing stress of the shaft and
Ans: C
key are 30 N/mm^2. Respectively. What is the
diameter of the shaft?
25. In practice and theory as well, the misalignment
of spherical bearings should not exceed how many
a. 22.2 mm
radians?
b. 21.7 mm
a. 0.0087 rad
c. 25.8 mm
b. 0.0065 rad
d. 30.2 mm
c. 0.0041 rad
d. 0.0043 rad
Ans.A
Ans: A
33. A line shaft with a power of 150 KW at a speed
of 1200 rpm, had a rectangular key used in its
pulley connection. Consider the shearing of stress
26. What term is used to describe a maximum load
of the shaft to be 40 N/mm^2 and the key to be 200
that a bolt can withstand without acquiring a
N/mm^2, determine the shaft diameter.
permanent set?
a. Live load
a.66.62 mm
b. Dead load
b.53.31 mm
c. Proof load
c.40.82mm
d. Ultimate load
d.44.94 mm
Ans: C
Ans. B
35. A cylinder having an internal diameter of 20 in 41. How do you call a brass that contains 28% zinc,
and an external diameter of 36 in is subjected to an 1 % tin and very excellent corrosion resistance
internal pressure of 10,000 psi and an external especially in saltwater.
pressure of 2,500 psi. Determine the hoop stress at
the inner surface of the cylinder. a. muntz metal
b. bronze
a. 24, 705.16 psi c. yellow brass
b. 19, 028.52 psi d. admiralty metal
c. 13, 142.86 psi
d. 11, 696.43 psi Ans. D

Ans. D.
42. A brass with 40% zinc or same composition as
36. A thin walled cylindrical pressure vessel is muntz metal expect for the addition of 0.75% tin
subjected to internal pressure which varies from 750 that contributes to the corrosion resistance of this
kPa to 3350 kPa continuously. The diameter of the material.
shell is 150 cm. Find the required thickness of the
cylinder based on yield point of 480 MPa net a. naval brass
endurance limit of 205 MPa and a factor of safety of b. bronze
2.5. c. cartridge brass
d. admiralty metal
a. 21.2 mm
b. 22.21 mm Ans. A
c. 23.83 mm
d. 20.72 mm
43. High pressure vessels and pipes carrying high
Ans. A pressure fluids develop which of the following
stresses?
37. A compression ring is to be used at the junction
of a conical head and shell. Determine the required a. tangential stress only
area of the compression ring if the pressure is 50 b. radial stress only
psi and the stress is 13750 psi. Assume efficiency c. bearing stress only
of the joint is 80%. d. both radial and tangential stress

a. 00715 d^2 Ans. C

b. 0.00482 d^2
c. 0.00712 d^2
d. 0.00682 d^2 44. For the rotating elements like flywheels and
blowers, the analysis of stresses will be based
Ans. A similar on which of the following theory?

a. thin-walled cylinder
38. A cylindrical vessel measuring (2ft x 5 ft) b. thick- walled cylinder
holds a gas at 3,000 psi. Using stainless OQT 12000, c. radial ball bearing
determine the thickness of the plate with a design d. rotating shaft member
factor of 1.4 yield. A assume efficiency of welded
joint as 85%. Ans. B

a. 0.549 in
b. 0.455 in 45. For thin-walled pressure vessels, which of the
c. 1.2 in following statements is correct of the stresses?
d. 0.3 in
a. Radial stresses is quite small as compared with
Ans. A the tangential stress.
b. Radial stresses is quite bigger as compared with
39. Which of the following is considered to be the the tangential stress.
lightest of all commercial metals and is used in c. Radial stresses is same as tangential stress.
aircraft industry? d. Only radial stress is present and no tangential
stress.
a. titanium
b. chromium Ans. A
c. magnesium
d. aluminum
46. How do you call the ratio of lateral strain to
Ans. C longitudinal strain?

40. Brass with 40% zinc are called ___ a. Poission’s ratio
b. Modulus of resilience
a. muntz metal c. Modulus of rigidity
b. bronze d. Offset ratio
c. yellow brass
d. admiralty metal Ans. A

Ans. A
47. A sheet metal working company purchase a 52. A cast iron flywheel with a mean diameter of 36
shearing machine from a surplus dealer without a inches changes speed from 300 rpm to 280 while it
flywheel. It is calculated that the machine will use gives up 8000 ft-lb of energy. What is the
2380 Joules of energy to shear a 1.2 mm thick sheet coefficient of fluctuation?
metal. The flywheel to be used will have a mean
diameter of 91.44 cm with a width of 25.4 cm. The a. 0.069
normal operating speed is 180 rpm and slows down to b. 0.015
160 rpm during the shearing process. Assuming that c. 0.082
the arms and the hub will account for 12 % of the d. 0.020
rim weight concentrated at the mean diameter and
that the material density is 0.26 lb/cu/ in, compute Ans. A
for the weight of the flywheel.
53. Which of the following processes usually used to
a. 296 kg create a bar of material of a particular shape and
b. 306 kg dimensions?
c. 347 kg
d. 385 kg a. extrusion
b. cold working
Ans. B c. forging
d. hot rolling
48. A 48 in diameter spoked steel flywheel having a
12 in wide x 10 in deep rim rotates at 200 rpm. How Ans. D
long a cut (in inches) can be stamped in one inch
thick aluminum plate if ultimate shearing strength 54. The G10400 is a plain carbon steel with steel
of the aluminum is 40,000 lb/in2. During stamping , with a carbon content of which of the following?
the force exerted by the stamp varies from a maximum
F lb at the point of contact to zero lb when the a. 0.37 to 0.44%
stamp emerges from the metal. Neglect the weight of b. 0.21 to 0.54%
the flywheel weight of the flywheel and spokes and c. 0.25 to 0.57%
use 0.28 lb/in3 density for flywheel material. d. 0.34 to 0.54%

a. 43.2 in Ans. A
b. 41.1 in
c. 44.5 in 55. The S30200 is usually called and 18-8 stainless
d. 35.9 in steel, which means 18% of what?

Ans. B a. chromium
b. nickel
49. A shearing machine requires 150 kg m of energy c. carbon
to shear a steel sheet, and has normal speed of 3.0 d. manganese
rev/sec slowing down to 2.8 rev/sec during the
shearing process. The flywheel account for 15% of Ans. A
its total weight, find the thickness of the rim in
cm. 56. Which of the following terms is used to descry
punch-pressed operations like forming, blanking
a. 0.00487 cm shallow drawing and coining?
b. 0.00432 cm
c. 0.00363 cm a. stamping
d. 0.00482 cm b. heading
c. roll treading
Ans. C d. spinning
Ans. A
50. In a shearing machine the energy is 29,264 ft-
lb, the ultimate shearing stress of the steel plate 57. Which of the following processes produce a
is 40,000 psi, the plate thickness is 1 inch the refined grain structure and eventually increased
length of the plate which can be sheared is: strength and ductility of the material?

a. 7055 in a. Extrusion
b. 10.55 in b. Cold working
c. 12.75 in c. Forging
d. 17.56 in d. Hot rolling

Ans. D Ans. C

51. What would be the weight of a flywheel in kg if 58. The S30200 is usually called and 18-8 stainless
the weight of the rim is 3 times the sum of the steel, which means 8% of what?
weight of the hub and arms. Given the outside
diameter and inside diameter to be 24 in and 18 in a. Chromium
respectively and the rim width is 4.5 in. (assume b. Nickel
steel flywheel) c. Carbon
d. Manganese
a. 140.95 kg
b. 160.95 kg Ans. B
c. 200.95 kg
d. 152.95 kg

Ans. D
59. It is a supersaturated solid solution of carbon 64. A single square thread power screw is to raise a
in ferrite and it the hardest and strongest form of load of 70 kN. The screw has a major diameter of 36
steel? mm and a pitch of 6 mm. The coefficient of thread
friction and collar friction are 0.13 and 0.10
a. Bainite
b. Ferrite respectively. If the collar mean diameter is 90 mm
c. Martensite and the screw turns at 60rpm, find the combined
d. Lignite efficiency of screw and collar.
A. 13.438%
Ans. C B. 15.530%
C. 14.526%
60. An ammonia compressor is driven by a 20kW motor.
D. 12.526%
The compressor and the motor RPM are 380 and 1750,
respectively. The small sheave has a pitch diameter
Ans. D
of 152.4 mm. If the bolt to be used is standard C-
120 (L=122.9in.). Determine the center distance
65. Find the horsepower required to drive a power
between sheaves
screw lifting a load of 4000 lbs. A 2 and ½ inches
A. 709 mm
double square thread with two threads/in is to be
B. 865 mm
used. The friction radius of the collar is 2 inches
C. 806 mm
and the coefficients of friction are 0.1 for the
D. 686 mm
threads and 0.15 for the collar. The velocity of the
nut is 10 ft/min.
Ans. C
A. 5.382 HP
B. 4.395 HP
61. A safety valve spring having 9 and ½ coils has
C. 3.683 HP
the ends squared and ground. The outside diameter of
D. 6.472 HP
the coil is 115 mm and the wire is 13 mm. It has a
free length of 203 mm. Determine the length of the
Ans. B
wire to which this spring must be initially
compressed to hold a boiler pressure of 1.38 MPa on
66. A flywheel has a mean diameter of 4 ft and is
the seat of 32 mm diameter. Modulus of rigidity is
required to handle 2200 ft-lb of kinetic energy. The
taken as G=80GN/m².
flywheel has a width of 8in. Normal operating speed
A. 172
is 300 rpm and the coefficient of fluctuation is to
B. 179
be 0.05. Find the weight of the rim assuming that
C. 192
the arms and hub are equivalent is 10% of the
D. 158 specific weight.
A. 412 lb
Ans. A
B. 334 lb
C. 452.4 lb
62. A single threaded trapezoidal metric thread has
D. 533 lb
a pitch of 4 mm, and a mean diameter of 18 mm. It is
used as a translation screw in conjunction with a
Ans. B
collar having an outside diameter of 37 mm and an
inside diameter of 27 mm. Find the required torque
67. Find the rim thickness for a cast iron flywheel
in N-m to raise a load of 400 kg if the coefficient
with a width of 200 mm, a mean diameter of 1.2 in a
of friction is 0.3 for both thread and collar.
normal operating speed of 300 rpm, a coefficient
A. 34.6 N-m
fluctuation of 0.05 and which is capable of hanging
B. 32.6 N-m
3000 N-m of kinetic energy. Assume that the hub and
C. 39.1 N-m
arms represent 10% of the rim weight and the
D. 38.5 N-m specific weight of cast iron is 7200 kg/m³
A. 25.28 mm
Ans. B
B. 28.82 mm
C. 28.25 mm
63. Determine the diameter of the stud bolt that are
D. 25.25 mm
required to fasten down the cylinder head of a 203
mm x 304 mm gas engine. There are ten bolts on the
Ans. C
block. The explosion pressure is 31 kg/sq.cm and
studs are made of ordinary bolts material SAE 1020.
68. A cast iron flywheel is rotated at a speed of
How deep should the bolt be drilled?
1200 rpm and having a mean rim radius of 1 foot. If
A. 38.1 mm
the weight of the rim is 30 lbs. What is the
B. 40.2 mm
centrifugal force? Use factor C=41.
C. 37.3 mm
A. 14,800 lbs
D. 35.5 mm
B. 70,000 lbs
C. 14 860 lbs
Ans. A
D. 14,760 lbs

Ans. D
69. The maximum-strain theory which apples only in 76. The rapid cooling of steel to a temperature
elastic range of stresses are also known as _______ between 400 to 800 deg F in enough time, then
austenite is transformed into a materials called.
A. Hooke’s Law A. Bainite
B. Saint Venant’s Theory B. Lignite
C. Stress-strain Theory C. Quinite
D. Cataligno’s Theory D. Ferrite

Ans. B Ans. A

70. It refers to the collision of two or more masses 77. A centrifugal pump is directly couple to a
with initial velocities. motor. The pump rating is 3,600 liters per minute
A. Shock against a total head of 8 meters of water. Pump
B. Impact efficiency is 65% at shaft speed of 550 rpm.
C. Creep Calculate the torsional stress induced on the 40 mm
D. Load diameter motor shaft.
A. 11,193.45 kPa
Ans. B B. 12,420.72 kPa
C. 10,010.85 kPa
71. A term used to describe sudden applied force or D. 13,113.83 kPa
disturbance.
A. Shock Ans. C
B. Impact
C. Creep 78. A 80 mm solid shaft is to be replaced with a
D. Load hallow shaft of equal torsional strength. Find
percentage of weight saved, if the outside of the
Ans. A hallow shaft is 100 mm.
A. 56.53%
72. A cone-disk spring is also known as _____ B. 67.31%
A. Believille Spring C. 48.49%
B. Heavy duty spring D. 52.90%
C. Helical spring
D. Conical spring Ans. D

Ans. A 79. A solid transmission shaft is 4.0 inches in

diameter. It is desired to replace it with a hallow
73. What is the other term used for die casting? shaft of the same material and same torsional
A. Thermosetting strength but its weight should only be half as much
B. Shell-molding as the solid shaft. Find the outside diameter of the
C. Metal-mold casting hallow shaft in millimeters.
D. Tangential casting A. 107.315 mm
B. 112.231 mm
Ans. C C. 122.940 mm
D. 131.204 mm
74. It is a cold-working process in which metal is
gathered or upset. Ans. C
A. Heading
B. Cold rolling 80. A railroad track is laid at a temperature of 10
C. Spinning degree F with gaps of 0.01 feet between the ends of
D. Stamping the rails. The rails are 33 feet long. If they are
prevented from buckling, what stress will result
Ans. A from a temperature of 110 degree F? Coefficient of
75. Which of the following is the high-leaded brass linear expansion = 6.5x per degree F.
used for instrument, lock and watch parts? A. 10,000 psi
A. Red brass B. 8,530 psi
B. Commercial brass C. 9,450 psi
C. Yellow brass D. 10409 psi
D. Engraver’s brass
Ans. D
Ans. D
81. What load P which causea total deformation of
0.036 inch of a steel rack which has a cross-section
area of 4 sq. inches and a length of 5 ft.
A. 55,000 lb
B. 72,000 lb
C. 60,000 lb
D. 50,000 lb

Ans. B
82. A lubrication where lubricant is introduced 89. What type of bolt threaded on both ends and can
between surfaces which are in rolling contact such be used where a through bolt impossible?
as roller gears or rolling bearings? A. Coupling
A. Hydrostatic lubrication B. Stud bolt
B. Hydrodynamic lubrication C. Carriage bolt
C. Elastohydrodynamic lubrication D. Machine bolt
D. Solid-film lubrication
Ans. B
Ans. C
90. What type of bolt distinguished by a short
83. What lubrication is usually used when bearings potion of the shank underneath the head being square
are operating at extreme temperatures? or finned or ribbed?
A. Hydrodynamic lubrication A. Coupling
B. Solid-film lubrication B. Stud bolt
C. Hydrostatic lubrication C. Carriage bolt
D. Liquid-film lubrication D. Machine bolt

Ans. B Ans. C

84. Which of the following is not a form of bearing 91. What is the term applied to the reciprocal of
lubrication? the velocity ratio?
A. Liquid-film lubrication A. Train value
B. Hydrodynamic lubrication B. Modular value
C. Hydrostatic lubrication C. Ratio factor
D. Solid-film lubrication D. None of these

Ans. A Ans. A

85. In ASTM standard, what is the instrument used in 92. For very slender column, what type of formula
determining viscosity? that is best applied?
A. Dynamic viscometer A. Column formula
B. Saybolt universal furol B. Moment formulas
C. Hagen-Poinsulle viscometer C. Slenderness formulas
D. Saybolt universe viscometer D. Euler formula

Ans. D Ans. A

86. In what country that the present theory of 93. Which of the following is the type of failure
hydrodynamic lubrication originates from? due to unstability?
A. China A. Buckling
B. Germany B. Stability
C. US C. Slenderness formulas
D. England D. Euler formula

Ans. D Ans. A

87. In viscosity chart, Raimond-Boyd analysis 94. What type of spring made in the form of dished
assumed that the viscosity of the lubricant is washer?
_________ A. Air spring
A. Constant B. Volute spring
B. Increasing C. Believille spring
C. Decreasing D. Motor spring
D. Vanishing
Ans. C
Ans. A
What is the minimum number of teeth on a smaller
88. What do you call the phenomenon occurring when sprocket for high speed?
two touching surfaces have a high contact pressure A. 12
and when these surfaces have minute relative motion? B. 21
A. Prestressing C. 24
B. Friction D. 14
C. Fretting
D. Carving Ans. B

Ans. C
Which of the following is the minimum number of A 100 mm diameter solid shaft is to be replaced with
teeth on a smaller sprocket for moderate speed? a hollow shaft equally strong (torsion) and made of
A. 15 the same material. The outside diameter of the
B. 12 hollow shaft is to 27 mm. What should be the inside
C. 21 diameter? The allowable shearing stress is 41.4 MPa?
D. 17 A. 107.42 mm
B. 105.82 mm
Ans. D C. 291.53 mm
D. 109.60 mmw
What is the minimum number of teeth on a smaller
sprocket for low speed? Ans. A
A. 11
B. 17 If the weight of 6” diameter by 48” long SAE 1030
C. 21 shafting is 174.5 kg then what will be the weight of
D. 12 chromium SAE 51416 of same size?
A. 305.79 lbs
Ans. 12 B. 426.70 lbs
C. 347.96 lbs
Two shaft at right angles to each other may be D. 465.89 lbs
connected by what arrangement?
A. Half turn Ans. C
B. ¾ turn
C. Quarter turn A 50 inches diameter diamond saw blade is mounted on
D. One turn a pulley driven steel shaft, required a blade
peripheral linear speed of 150 ft/sec. Motor drive
Ans. C is 125 hp at 1,200 rpm, with 6 inches diameter
pulley. Determine the shaft rpm to attain blade
What is the recommended initial tension of the belt? peripheral speed required.
A. 75 lb/in of width A. 716.2 rpm
B. 71 lb/in of width B. 635.3 rpm
C. 73 lb/in of width C. 539.10 rpm
D. 80 lb/in of width D. 687.55 rpm

Ans. A Ans. D

What factor of safety is needed for a 2 in. diameter A steel shaft transmits 40 hp at 1400 rpm.
shaft with an ultimate strength of 50,000 psi to Considering allowable shearing stress based on pure
transmit 40,000 in-lb torque. torsion to be 5000 psi, find the torsional
A. 2.25 deflection of the shaft in degrees per foot.
B. 1.95 A. 0.392 degrees/foot
C. 2.14 B. 0.246 degrees/foot
D. 2.62 C. 0.541 degrees/foot
D. 0.435 degree/foot
Ans. D
Ans. B
A round steel shaft transmits 373 watts at 1800 rpm.
The torsional deflection is not to exceed 1 deg in a The process by which high pressure is applied to a
length equal to 20 diameters. Find the shaft heated metal billet or blank which causes it to flow
diameter. through restricted orifice.
A. 6.53 mm A. Extrusion
B. 8.72 mm B. Intrusion
C. 12.84 mm C. Forging
D. 18.16 mm D. Hot rolling

Ans. A Ans. A

A steel shaft operates at 186 rad/s and must handle A tolerance where the size of a part is permitted to
2 kW of power. The shearing stress is not to exceed be either larger or smaller than the given
40 MN/m². Calculate the minimum shaft diameter based dimension.
on pure torsion. A. Bilateral
A. 9 mm B. Unilateral
B. 11 mm C. Lateral
C. 13 mm D. None of these
D. 15 mm
Ans. A
Ans. B
In a pressure vessel, the ratio of minimum strength An engine of a motor vehicle with a wheel diameter
of joint to the strength of solid joint is known as of 712 mm develops 50 kW at 2,000 rpm. the combined
A. Efficiency efficiency of the differential and transmission is
75% with an overall speed reduction of 25 is to 1.
B. Performance factor
determine the speed reduction of travel of the
C. Joint efficiency vehicle in km/hr.
D. Relative strength a. 10.74
b. 11.69
Ans. D c. 12.58
d. 13.80
When tested in compression, ductile material usually
Ans. A
exhibit________ characteristics up to the yield
strength as they do when tested in tension. An engine of a motor vehicle with a wheel diameter
a. the same of 712 mm develops 50 kW at 2,000 rpm combined
b. less than efficiency of the differential and transmission is
c. more than 75% with an over-all speed reduction to. 1 determine
d. approximately the same he torque to be delivered by the clutch N-m.
a. 239 N-m
ans. D b. 359 N-m
c. 432 N-m
In pure torsion, the maximum stress is at the center d. 471 N-m
of the
a. peripheral sides Ans: A
b. long sides
c. medium sides The large diamter and face of the disk of a multiple
d. short sides disk clutch are 255 mm and 25 mm respectively the
helical compression spring used to engage the clutch
ans: B has 9 and 1/2 effective coils of 10 mm steel wire.
the outer coil diameter is 80 mm. the free length of
The ability of a material to absorb energy within is the spring is 185 mm. when in place with clutch
proportional limit is known as engaged, its length is 130 mm. Assuming that there
a. resilience is 10 pairs of friction surface in contact, that the
b. endurance motor runs at 1200 rpm, f=0.15, determine axial
c. toughness force available for the clutch.
d. spring action a. 1,688 N
b. 2,493 N
ans: A c. 1,542 N
d. 2,783 N
A method whereby a gear is run with another gear
that has abrasive surface material. Ans: A
a. hobbing
b. honing A flange bolt coupling consist of eight steel 20 mm
c. lapping diameter steel bolts spaced evenly around a bolt
d. milling circle 300 mm in diamter. if the coupling is
subjected to a torque of 15.1 KN-m, determine the
ans. C maximum shearing stress in the bolts?
a. 40450 kPa
A multiple disc clutch of 10 steel disc and 9 bronze b. 63320 kpa
disc. the effective outside and inside diameter are c. 40054 kpa
20.32 cm and 15.24 cm, respectively if the axial d. 31298 kpa
force of 450 Newton is applied and the shaft turns
at 1200 rpm, find the horsepower capacity, assume a Ans: C
coefficient of friction of 0.27.
a. 39.566 hp a flange coupling is to be designed, using 25 mm
b. 40.482 hp diameter bolts at a distance of 152 mm from the
c. 37.456 hp center of the shaft. allowable shearing stress on
d. 35. 659 hp the bolt is 103 Mpa. if the shaft is to transmit
5,600 hp at a speed of 1200 rpm, how many bolts are
Ans: A needed in the connection?
a. 2
An engine of a motor vehicle with a wheel diameter b. 3
of 712 mm develops 50 kW at 2,000 rpm. the combined c. 4
efficiency of the differential and tranmission is d. 5
75% with an overall speed reduction of 25 is to 1.
Determine the speed reduction of travel of the Ans: D.
vehicle in km/hr.
a. 10.74 Two short shaft identical diameter 38.1 mm and
b. 11.69 rotating ….
c. 12.58
d. 13.80 a. 30.4 kW
b. 28.5 kW
Ans: A c. 29.3 kW
d. 32.3 kW

Ans:B
Two short shaft identical diameter 38.1 mm and The corrosion resistance of aluminium alloys depends
rotating …. upon which of the following?
a. Thin coating oxide
a. 19.30 mm b. Percentage of electrolyte present
b. 22.37 mm c. Dissolve ferrite
c. 20.40 mm d. Casting of the material
d. 16.32 mm
Ans: A
Ans: D
A spherical shell of 1.8 m of outside diameter and
What is material is produced if austenite is cooled 1.725 m inside at a pressure of 10.4 MPa. Compute
rapidly to 400 deg. F or less? the stress in the shell.
a. Bainite a. 124.8 Mpa
b. Fermite b. 119.6 Mpa
c. Martensite c. 96.48 Mpa
d. Lignite d. 88.46 Mpa

Ans: C Ans: B

Stainless steels are iron-based alloys that contain A thin hollow spheres of radius 10 in and thickness
at least how many percent chromium? 0.1 in is subjected to an internal pressure of 100
a. 45% psig the maximum normal stress on an element of the
b. 25% sphere is:
c. 12% a. 5,000 psi
d. 5% b. 7,070 psi
c. 14,140 psi
Ans: C d. 2,500 psi

The very high carbon steels have good quench-harden Ans: A

ability up to how many percent chromium?
a. 35% Pressurized water at 1.37 Mpa is stored in a steel
b. 12% cylindrical tank 1.4 meters in diameter. If the
c. 18% allowable tangential stress is 8.5 Mpa, find the
d. 15% required wall thickness of the tank.
a. 123.6 mm
Ans: C b. 130.5 mm
c. 112.9 mm
A widely used in tool steels considering that the d. 135.1 mm
will maintain its hardness even it is red heat. The
effect is like molybdenum, except it is to be added Ans: A
in greater quantities.
a. Vanadium A mechanical press is used to punch 6 holes per
b. Manganese holes is 25 mm diameter and the plates has an
c. Tungsten ultimate strength in shear of 420 Mpa. The normal
d. Nickel operating speed 200 rpm. And it slows down to 180
rpm during the process of punching. The flywheel has
Ans: C a mean diameter of one meter and the rim width is 3
times the thickness. Assume that the hub and arm
Which of the following is the most widely used cast account for 5% of the rim weight concentrated at the
materials? mean diameter and the density of cast iron is 7200
a. White cast iron kg per cubic meter. Find the power in kW required to
b. Gray cast iron drive the press.
c. Malleable cast iron a. 1.310 kW
d. Nodular cast iron b. 5.57 kW
c. 8.92 kW
Ans: B d. 9.03 kW

What is the result if all the carbon in cast iron is Ans: A

in the form of cementite and pearlite with not
graphite present? Find the weight of the flywheel needed by a machine
a. White to punched every stroke plane. The machine is to
b. Gray make 30 strokes per minute and a hole must be
c. Malleable punched every stroke. The hole is to be formed
d. Nodular during 30 degrees rotation of the puncher’s
crankshaft. A gear train with a ratio of 12 to 1 is
Ans: A to connect the flywheel shaft to the crankshaft. Let
the mean diameter of a flywheel rim to be 91.44 cm.
Which of the following is a characteristic of the minimum flywheel speed is to be 90% of the
aluminium and its alloys? maximum and assume mechanical efficiency of the
a. Resistance to corrosion machine to be 80%. Assume an ultimate stress of
b. High thermal and electrical resistance 49000 psi.
c. Strength to weight ratio a. 1.310 kW
d. All of these b. 5.57 kW
c. 8.92 kW
Ans: D d. 9.03 kW

Ans: A
Find the weight of the flywheel needed by a machine The breaking strength of oak-tanned beltings varies
to punch 20.5 mm holes in 15.87 mm thick steel from 3 to more than:
plate. The machine is to make 30 strokes per minute a. 5 ksi
and a hole be punched every stroke, the hole is to b. 7 ksi
be formed during 30 degrees rotation of the puncher c. 6 ksi
crankshaft. A gear train with a ratio of 12 to 1 is d. 9 ksi
to correct the flywheel shaft to the crankshaft. Let
mean diameter of a flywheel rim to the 91.44 cm. the Ans: C
manimum flywheel speed is to be 90% of the maximum
and assume mechanical efficiency of the machine to Based on experience, what is the most economical
be 80% Assume an ultimate stress of 49000 psi. design belt speed?
a. 6000 to 7500 fpm
a. 68 kg b. 3500 to 4700 fpm
b. 97 kg c. 3000 to 5000 fpm
c. 90 kg d. 5000 to 1000 fpm
d. 92 kg
Ans: A
Ans: B
The tension in the belt due to centrifugal force
It is found that the shearing machine requires 205 increasing rapidly above about
joules of energy to shear a specific gauge of sheet a. 1500 fpm
metal. The mean diameter of the flywheel is to be b. 3500 fpm
76.2 cm. the normal operating speed is 200rpm and c. 3000 fpm
slow down to 180 rpm during shearing process. The d. 2500 fpm
rim width is 30.48 cm and the weight of cast iron is
7,196.6 kg/m^3, find the thickness of the rim, Ans: D
assuming that the hub and arm account for 10% of the
rim weight concentrated on the mean diameter. What is the recommendation speed for leather belt?
a. 0.583 cm a. 6000 to 7000 fpm
b. 0.587 cm b. 7000 to 8000 fpm
c. 0.672 cm c. 5000 to 6000 fpm
d. 0.480 cm d. 4500 to 5600 fpm

Ans: B Ans: B

Which of the following cannot be a Poisson’s ratio What is the recommended speed for fabric belts?
of material? a. 4000 to 5000 fpm
a. 0.35 b. 2000 to 3000 fpm
b. 0.20 c. 3000 to 4000 fpm
c. 0.57 d. 2000 and more fpm
d. 0.12
Ans: A
Ans: C
A tubular shaft, having an inner diameter of 30 mm
Type of roller bearing in which the balls are and an outer diameter of 42 mm, is to be used to
assembled by the eccentric displacement of the inner transmit 90 kW of power, determine the frequency of
ring. rotation of the shaft so that the shear stress
a. Shallow groove ball bearing cannot exceed 50 Mpa.
b. Self-alignning ball bearing a. 26.6 Hz
c. Fillinf-shot ball bearing b. 20.6 Hz
d. Deep-groove ball bearing c. 97.5 Hz
d. 66.5 Hz
Ans: D
Ans: A
Which of the following is not a type of ball
bearing? Two circular shaft, one hollow and one solid, are
a. Shallow groove ball bearing made of the same material and have diameter as
b. Self-aligning ball bearing follows: hollow shaft inside diameter is one-half of
c. Filling-slot ball bearing the external diameter. The external diameter is
d. Deep-groove ball bearing equal to the diameter of the solid shaft. What is
the ratio of the twisting moment of the hollow shaft
Ans: A to that of the solid shaft?
a. ¼
Which of the following is the approximate density of b. ½
the leather belt? c. 9/16
a. 0.025 lb/in^3 d. 15/16
b. 0.035 lb/in^3
c. 0.0135 lb/in^3 Ans: D
d. 0.0465 lb/in^3

Ans: B
Determine the thickness of hollow shaft having an What is term applied to the load at which a column
outside diameter of 100 mm if it is subjected to a fails?
maximum torque of 5,403.58 N-m without exceeding a a. Maximum load
shearing stress of 60 Mpa or a twist of 0.5 degree b. Moving load
per meter length of shaft G=83,000 Mpa c. Critical load
a. 15 mm d. Dynamic load
b. 86 mm
c. 16.8 mm Ans. C
d. 14.2 mm
It is otherwise known as the percentage difference
Ans: A in solid and working deflections?
a. Clash allowance
A hollow shaft with outside diameter of 14 cm, and b. Spring allowance
wall thickness of 0.8 cm, transmits 200 kW at 500 c. Working allowance
rpm. What must be the angular deflection of the d. Thrust allowance
shaft it the length in 5 meters? The material of the
shaft is C4140 steel. Ans. C
a. 21.41 rad
b. 21.71 rad It is known as the shaft’s natural frequency of
c. 36.80 rad vibration.
d. 17.37 rad a. Vibration index
b. Critical speed
Ans. D c. High speed
d. Low speed
A 1 1/4 in by 7/8 in. key is to be designed for a
12.7 cm shaft which will transmit power of 150 KW at Ans. B
360 rpm. If the allowable shear stress for the key
is 920 kg/cm^2 and the allowable compressive stress What do you call the mixture of the solid
is 1300 kg/cm^2. Determine the length of key to be ingredients with no solubility?
used. a. Binary alloy
a. 2.41 cm b. Miscible alloy
b. 2.73 cm c. Bitectic material
c. 4.42 cm d. Eutectic alloy
d. 4.79 cm
Ans. D
Ans. C
Which of the following terms applied to an
A pulley is keyed to a 2 and 1/2 inches diameter interrupted quenching process resulting in an
shaft by a 7/16 in x 3 in flat key. The shaft austenite to banite transition?
rotates at 50 rpm. The allowable compressive stress a. Austempering
for the key, hub and shaft are 66 ksi. 59 ksi and 72 b. Austenitizing
ksi, repectively. Determine the maximum torque the c. Martempering
pulley can safety deliver. d. Martenitizing
a. 48398.4 in-lb
b. 54140.6 in-lb Ans. A
c. 51562.5 in-lb
d. 67495.2 in-lb Which of the following processes where the material
will become progressively stronger, harder and more
Ans. A brittle until eventually fails?
a. Hot working
Which of the following is the statement of how the b. Cold Working
total moment is derived from a number of forces c. Tempering
acting simultaneously at a point? d. Normalizing
a. Goodman’s theorem
b. Varignon’s theorem Ans. B
c. Soderberg’s theorem
d. Cataligno’s theorem …. to engage the clutch?

Ans. B a. 600 lbs

b. 715 lbs
It is the measure of the material’s ability to yield c. 625 lbs
and absorb highly localized and rapidly applied d. 800 lbs
stresses.
a. Hardness Ans. B
b. Toughness
c. Stiffness A set screw 12 mm effective diameter is broken by a
d. Resilience force of 410 N on the end of a spanner 300 mm long.
Find the torque to break a set screw of 16 mm
Ans. B effective diameter if its breaking stress is 10%
greater than the former.
a. 320.6 N-m
b. 223.5 N-m
c. 230.5 N-m
d. 345.6 N-m

Ans. A
A Warwick screw is used to tighten a guy rope. It An internal gearing requires an idler gear if the
has right-hand thread of 10 mm pitch at the top and driving gear of 6 inches in diameter and the center
a left-hand thread of 5 mm pitch at the bottom, and distance of the idler to the driver is 20 inches.
the effective radius of the toggle bar is 336 mm.
What is the inside diameter of the driven gear?
Find the velocity.
a. 220.6 A. 62
b. 130.5 B. 70
c. 140.8 C. 74
d. 210.5 D. 81

Ans. C Ans. C
A 4 inches diameter shaft is driven at 3600 rpm by a
In a standard bevel gear, the pinion rotates at 150
400 Hp motor. The shaft drives a 48 inches diameter
rpm, its number of teeth is 14 while the gear has 42
chain sprocket having an output efficiency of 85%.
teeth, what is the pitch angle of the pinion?
The output force of the driving sprocket and the
A. 18.4 degrees
output of the driven sprocket are:
B. 20 degrees
A. 200 lb and 250 hp
C. 14.5 degrees
B. 261.6 lb and 300 hp
D. 20.5 degrees
C. 291.66 lb and 340 hp
D. None of the above
Ans. A
Ans. C
In damped free vibration, when the system returns to
its static position with the …… equilibrium, the
A certain farm equipment which requires 2200 Newton
system is said to be
mater torque at 500 RPM has a diesel engine to
A. Underdamped
operates at 1500 RPM as its prime mover. A No. 60
B. Overdamped
roller chain with a total length of 60 pitches and a
C. Resonant
small sprocket with 23 teeth are to be used with an
D. Critically damped
operating temperature to remain constant at 45
degree C. Determine the no. of teeth of the larger
Ans. D
sprocket.
A. 70
Balancing o grinding wheel is done to
B. 69
A. Make the outside diameter concentric with
C. 68
the bore
D. 69
B. Make the sides of wheel parallel
C. Equalize the weight in every portion of the
Ans. D
wheel
D. None of the above
A sleeve bearing has an outside diameter of 1.5 in
and a length of 2 in, the wall thickness is 3/16 in.
Ans. C
The bearing is subjected to a radial load of 450 lb.
Find the bearing pressure.
A grinding wheel is marked as 51A 46L 5V 23, out of
A. 100 psi
these 5 means
B. 150 psi
A. Kind of abrasive
C. 200 psi
B. Structure
D. 250 psi
C. Kind of bond
D. Grain size
Ans. C
Ans. B
Find the torsional deflection, in degrees of a solid
steel shaft 110 mm OD 1.4 m long subjected to 3.1 x
It is also known as diamond pyramid hardness test,
N-mm. The torsinal modulus of elasticity is
uses a pyramid shaped diamond indenter and a load
80,000 N/mm-mm
that ranges from 1 kg to 120 kg.
A. 0.22 A. Vickers test
B. 0.195
B. Mohs hardness
C. 0.28
C. Knoop test
D. 0.24
D. Brinell test

Ans. A
Ans. A

A cut gear transmits 25 Hp at a pitch line velocity

The maximum moment induced in a simply supported
of 6000 ft/min. If the service is intermittent the
beam of 20 foot span, by a 2,000 pound load at
dynamic load is:
midspan is
A. 244 A. 125,000 ft-lbs
B. 264
B. 15,000 ft-lbs
C. 274
C. 30,000 ft-lbs
D. 284
D. 10,000 ft-lbs

Ans. C
Ans. D
A 10" diameter pulley is belt driven with a net Which of the following dynamometer is widely used
torque of 250 ft-lbs. The ratio of tensions in the for absorption of wide range of powers at wide range
tight to stack sides of the belt is 4 to 1. What is of speeds?
the maximum tension in the belt? A. Hydraulic
A. 250 lbs. B. Belt transmission
B. 800 lbs. C. Rope brake
C. 83 lbs. D. Electric generator
D. 500 lbs.
Ans. A
Ans. B
Which of the following dynamometer is used for power
Compute how many 3/8 inch diameter set screws measurement when the speed is high and the viscous
required to transmit 3 Hp at a shaft speed of 1000 force is small?
rpm. The shaft diameter is 1 inch A. Tesla fluid friction dynamometer
A. 1 ½ B. Froude water vortex dynamometer
B. 2 C. Rope brake dynamometer
C. 3 D. Amsler dynamometer
D. 1
Ans. A
Ans. B
In case of spur gears the flank of the tooth is
A drop hammer of 1 ton dead weight capacity is A. The part of the tooth surface lying below
propelled downward by a 12 inch diameter cylinder. the pitch surface’
At 100 psi air pressure what is the impact velocity B. The curve forming face and flank
if the stroke is 28 inches? C. The width of the gear tooth measures axially
A. 47.4 ft/sec along the pitch surface
B. 31.6 ft/sec D. The surface of the top of the tooth
C. 15.8 ft/sec
D. 63.2 ft/sec Ans. A

Ans. B The cam angle is

A. The angle of rotation of the cam for a
A link has a load factor of 0.8 the surface factor definite displacement of the follower
0.8, the surface factor is 0.92 and the endurance B. Angle subtended by live portion of cam at
strength is 28000 psi. Compute the alternating the cam center’
stress of the link if it is subjected to a reversing C. The angle subtended at the cam center by the
load. Assume a factor of safety of 3. portion of cam during which the follower
A. 8150 moves
B. 10920 D. The angle subtended by the cam at the cam
C. 9,333 center when the follower dwells.
D. 7260
Ans. A
Ans. C
For a kinematic chain to be considered as mechanism
Determine the average time to cut by automatic oxy- A. None of the links should be fixed
acetylene (machine) crosswise a 4ft x 8ft x 4in B. One link should be fixed
thick steel plate. C. Two links should be fixed
A. 6.85 min. D. There is no such criterion
B. 318 sec
C. 10 min Ans. B
D. 360 sec
Slip in belt drive is
Ans. D A. Loss of power
B. Difference between the angular velocities of
A 16 mm plate is lapped over and secured by fillet two pulleys
weld on the inside and outside to form a penstock C. Difference between the velocities of two
1.5 meter in diameter. Determine the safe internal pulleys
pressure, assuming an allowable stress of 140 MPa on D. Difference between the linear speed of the
the plate and an allowable shear stress of 90 MPa on rim of pulley and the belt on it.
the throat side of the 14 mm fillet weld.
A. 2.376 MPa Ans. D
B. 3.590 MPa
C. 2.843 MPa
D. 1.695 Mpa

Ans. A
Multiple collars are provided on a flat collar pivot A short compression member with Do= 2Di is to
bearing to support a dead load of 25 tons. The material is to
A. Increase frictional resistance be 4130. A short compression member with Do= 2Di is
B. To establish self-sustaining bearing to support a dead load of 25 tons. The material is
condition to be 4130 steel, WQT 1100⁰F. Calculate the outside
C. Distribute the frictional load due to and inside diameters on the basis of yield strength
limiting friction of 114 ksi and factor of safety of 2.
D. Distribute the axial load due to limiting
bearing pressure on a collar Ans. Do=1.22 in. and Di=0.61 in.

Ans. D A 15/16-in wide key has a depth of 5/8 in. It is 12

inches long and is to be used on a 200 hp, 1160 rpm,
In gramophones for adjusting the speed of the tum- squirrel-cage induction motor. The shaft diameter is
table, the following type of governor is commonly 3 7/8 inches. The maximum running torque is 200% of
used the full-load torque. Determine the maximum
A. Hartung governor compressive stress of the key
B. Inertia governor A. 779 psi
C. Pickering governor B. 997 psi
D. Wilson hartnell C. 197 psi
D. 279 psi
Ans. C
Ans. B
Shearing the sheet into two or more pieces
A. Parting A storage tank for air, 36 inche in diameter, is to
B. Perforating withstand an internal pressure of 200 psi with a
C. Lancing design factor of 4 based on Su. The steel has the
D. Notching strength equivalent to C1020 annealed and the welded
joints should have a relative strength (efficiency)
Ans. A of 90%. If Su for annealed C1020 steel is 57 ksi.
Compute the longitudinal stress.
The mechanism used to enlarge or reduce moments for A. 128,000 psi
reproducing drawings to different scales is called B. 21,000 psi
A. Clinograph C. 800,000 psi
B. Trisquare D. 12,800 psi
C. Graphometer
D. Bantograph Ans. D

Ans. D The mass of a flywheel is 175 kg and its radius of

gyration is 380 mm. Find the torque required to
Which of the following is a higher pair? attain a speed of 500 rpm from rest in 30 seconds.
A. Thomson an indicator mechanism A. 40.46 N
B. Double Mc Innes Indicator mechanism B. 44.12 N
C. Hart’s straight line mechanism C. 35.66 N
D. Tooth gearing mechanism D. 38.48 N

Ans. D Ans. B

A process of indenting but not breaking through the A steel bar 24 in. in length is to withstand a
surface of a workpiece with a punch in order to tensile impact load caused by a weight of 100 lb
produce a cavity of an impression having a velocity on impact of 140 fpm. Find the
A. Heading stress in the bar if the diameter is 1 ½ in and the
B. Cogging modulus of Elasticity (E) is 30x psi.
C. Barreling
D. Piercing Ans. S=12,000 psi

Ans. D The cylinder head of a 10in x 18in. freon compressor

is attached by 10 stud bolts made of SAE grade 5.
A turbine developing 15,000 Hp turns the shaft at The cylinder pressure is 300 psi. What is the
300 rpm. The propeller attached to this shaft approximate tightening torque should be used to
develops a thrust of 150,000 lb. A hollow steel induce a tightening stress (St) of 0.90 times the
shaft having an outside diameter of 14 in. is to be proof stress if the diameter of the bolt is 5/8 in
used. Determine the inside diameter of the shaft if and coefficient of collar friction c = 0.2?
the maximum shearing stressed based on the torsion
alone is not to exceed 7500 psi. What is the Ans. T = 2161 in-lb
percentage savings in weight.

Ans. %W saving = 37.3%

Calculate the power consumed during cutting of a low A crate weighing 4,000 lb is moving at a speed of
carbon steel bar 40 mm diameter if cutting force is 4ft/s. It is brought to rest by two compression
150 kg at 200 rpm. spring in stopping the crate, the springs are to be
A. 0.46 hp compressed 8 in. If the spring index is 6 and the
B. 0.66 hp allowable stress is 52,000 psi, determine the
C. 0.75 hp maximum load on each springs.
D. 0.83 hp A. 1491 lbs
B. 2037 lbs
Ans. D C. 1675 lbs
D. 2453 lbs
A broach is used to cut a key way 8mm wide, 5mmm
deep in a boss 64mm long. Determine the cutting Ans. A
length of broach if the rise per tooth is 0.0875mm
and the number of finishing teeth is 13. What describes very rough grinding such as that
A. 672 mm performed in foundries to remove gates, fins and
B. 627 mm risers from castings?
C. 762 mm A. Snagging
D. 726 mm B. Honing
C. Lapping
Ans. C D. Snugging

Calculate the power of electric motor for a drilling Ans. A

machine to drill a hole 15 mm diameter in cast iron
workpiece at 450 rpm and 0.2 mm feed. The specific Which of the following is a single measure that
power is 0.03 kW and efficiency of motor is 80%. combines the external dynamic load of an application
A. 0.6 kW with a gear drive’s reliability and operating life?
B. 0.9 kW A. Ratio factor
C. 0.7 kW B. Service factor
D. 0.4 kW C. Reliability factor
D. Life factor
Ans. A
Ans. C
A double square thread screw is used to raise a load
of 20,000 lb at a velocity of 3 fpm. Outside What is the term used to described the distance from
diameter of thread and pitch are 2 7/8 in. and 1 in. a point on one gear to the corresponding point
respectively. Collar friction coefficient is 0.12, measures along the base circle.
thread friction coefficient is 0.10. Mean diameter A. Diametral Pitch
of collar 5 in. Determine the power required to B. Circular Pitch
drive the screw. C. Normal Pitch
A. 3.45 hp D. Chordal pitch
B. 4.29 hp
C. 4.65 hp Ans. C
D. 5.02 hp
Which of the following is the best method used for
Ans. B increasing a spring’s fatigue life?
A. Sprickling
Two 2 ¾ in sellers standard square thread screws are B. Shot peening
used to raise and lower a hydraulic gate weighing 60 C. Stress relieving
tons. A 570 rpm electric motor operates the screws. D. Shot relieving
The coefficients of collar and thread friction are
0.03 and 0.14 respectively. The mean diameter of the Ans. B
collar 4in. if the gate rises at the rate of 2fpm,
determine the size of the motor required to lift the What is the term applied to parallel forces equal in
gate if the mechanical efficiency is 85% for the magnitude but opposite direction?
speed reducing equipment. A. Concurrent forces
A. 20 hp B. Non-concurrent forces
B. 30 hp C. Couple
C. 34 hp D. Equillibrant
D. 24 hp
Ans. C
Ans. C
It is one of the rigid members / bodies joined
together to form a kinematic chain.
A. Coplanar
B. Link
C. Frame
D. Machine

Ans. B
The kinematics chain in which one link is considered
fixed for the purpose of analysis but motion is
possible in other links.
A. Belting
B. Mechanism
C. Frame
D. Sprocket Chain

Ans. C

What describes very rough grinding, such as that

performed in foundries to remove gates, fins and
risers from castings?
A. Snagging
B. Honing
C. Lapping
D. Snugging

Ans. A

Two spur wheels in gear transmit a power 6.7 kW. The

driver has 40 teeth of 12 mm pitch and runs at 7
rev/s,find the force on the teeth.
a. 2.0 kN
b. 1.0 kN
c. 3.0 kN
d. 4.0 kN

Ans. A