A True
B False

A less than 50%
B more than 50%
C equal to 50%
D none of these

# Q3: The load cup of a screw jack is made separate from the head of the spindle to

A enhance the load carrying capacity of the jack
B reduce the effort needed for lifting the working load
C prevent the rotation of load being lifted
D reduce the value of frictional torque

# Q5: The pipe joint mostly used for pipes carrying water at low pressures is

A socket joint
B nipple joint
C union joint
D spigot and socket joint

A d
B 1.5 d
Cd
D 2.5 d

# Q7: In radial cams, the follower moves

A in a direction perpendicular to the cam axis
B in a direction parallel to the cam axis
C in any direction irrespective of cam axis
D along the cam axis

# Q8: A flanged pipe joint will be a leak-proof joint, if the circumferential pitch of the bolts is (where d = Diameter of bolt hole)

A less than 20 d
B greater than 30 d
C between 20 d and 30 d
D equal to inside diameter of pipe

# Q9: Screws used for power transmission should have

A Low efficiency
B high efficiency
D strong teeth

A Correct
B Incorrect

A True
B False

# Q12: The resistance to fatigue of a material is measured by

A elastic limit
B Young's modulus
C ultimate tensile strength
D endurance limit

# Q13: According to I.B.R., shearing resistance required to shear off the rivet per pitch length (in double shear) is (where n = Number of rivets per pitch length)

A d2 x τ x n
B 1.875 x d2 x τ x n
C 2 x d2 x τ x n
D 3 x d2x τ x n

A castle nut
B jam nut
C ring nut
D sawn nut

A transmission
B machine

B shank
D middle

A
B
C
D

# Q18: The velocity of sliding __________ the distance of the point of contact from the pitch point.

A is directly proportional to
B is inversely proportional to
C is equal to cos φ multiplied by
D does not depend upon

# Q19: Two shafts A and B under pure torsion are of identical length and identical weight and are made of the same material. The shaft A is solid and the shaft B is hollow. We can say that

A shaft B is better than shaft A
B shaft A is better than shaft B
C both the shafts are equally good

# Q20: The ball bearings are provided with a cage

A to reduce friction
B to facilitate slipping of balls
C to prevent the lubricant from flowing out
D to maintain the balls at a fixed distance apart

# Q21: Which of the following statement is wrong ?

A The power transmitted by V-belts is less than flat belts for the same coefficient of friction, arc of contact and allowable tension in the belts
B The V-belt drive is used with large centre distance
C The V-belt may be operated in either direction with tight side of the belt at the top or bottom
D The ratio of driving tensions in V-belt drive is more than flat belt drives

# Q22: In a hydrodynamic lubricated bearing

A there is a thick film of lubricant between the journal and the bearing
B there is a thin film of lubricant between the journal and the bearing
C there is no lubricant between the journal and the bearing
D the lubricant is forced between the journal and the bearing, by external pressure

# Q23: An open belt drive is used when

A shafts are arranged parallel and rotate in the opposite directions
B shafts are arranged parallel and rotate in the same directions
C shafts are arranged at right angles and rotate in one definite direction
D driven shaft is to be started or stopped whenever desired without interferring with the driving shaft

# Q24: The toughness of a material __________ when it is heated.

A increases
B decreases
C does not change

# Q25: In second type of levers,

A load is in between the fulcrum and effort
B effort is in between the fulcrum and load
C fulcrum is in between the load and effort
D none of these

# Q26: For unequal width of butt straps, the thickness of butt straps are

A 0.75 t for wide strap on the inside and 0.625 t for narrow strap on the outside
B 0.75 t for narrow strap on the inside and 0.625 t for wide strap on the outside
C 0.75 t for both the straps on the inside and outside
D 0.625 t for both the straps on the inside and outside

A dun cylinder
B thick cylinder
C solid shaft
D hollow shaft

A 2
B 4
C 6
D 8

# Q29: Soderberg relation is based on __________ of the material whereas all other failure relation for dynamic loading are based on ultimate strength of the material.

A elastic strength
B yield strength
C shear strength

# Q30: In unilateral system of tolerance, the tolerance is allowed on

A one side of the actual size
B one side of the nominal size
C both sides of the actual size
D both sides of the nominal size

A True
B False

A Mild steel
B Copper
C Zinc
D Aluminium

A Correct
B Incorrect

A
B
C
D

A
B
C
D none of these

# Q36: Surface endurance limit of gear material is dependent upon its

A elastic strength
B yield strength
C brinell hardness number
D toughness

# Q37: The value of stress concentration factor depends upon

A material of the part
B geometry of the part
C material and geometry of the part
D none of these

A Agree
B Disagree

# Q39: According to Indian standard specifications, 100 H6/g5 means that the

A actual size is 100 mm
B basic size is 100 mm
C difference between the actual size and basic size is 100 mm
D none of the above

# Q40: Which of the following statement is correct for gears?

A The addendum is less than dedendum
B The pitch circle diameter is equal to the product of module and number of teeth
C The pitch circle is always greater than the base circle
D all of the above

# Q41: Slenderness ratio is the ratio of

A maximum size of column to minimum size of column
B width of column to depth of column
C effective length of column to least radius of gyration of the column
D effective length of column to width of column

# Q42: The application of third type levers is found in

A handle of a hand pump
B hand wheel of a punching press
C lever of a loaded safety valve
D a pair of tongs

A 40
B 50
C 70
D 100

A bolts and nuts
B studs
D none of these

A True
B False

A counter shaft
B line shaft
D all of these

# Q47: Stress concentration is caused due to

A variations in load acting on a member
B variations in properties of materials in a member
C abrupt change of cross-section
D all of these

A d = t
B d = 1.6 t
C d = 2 t
D d = 6 t

A 1.06
B 1.12
C 1.26
D 1.58

# Q50: When bevel gears connect two shafts whose axes intersect at an angle greater than a right angle and one of the bevel gears has a pitch angle of 90°, then they are known as

A angular bevel gears
B crown bevel gears
C internal bevel gears
D mitre gears

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