Q.1
The metal suitable for bearings subjected to heavy loads is
Q.2
Which of the following key is preferred for the condition when a large amount of impact type torque is to be transmitted in both direction of rotation?
Q.3
The cold working of metals is carried out __________ the recrystallization temperature.
Q.4
The metal suitable for bearings subjected to light loads is
Q.5
The objective of caulking in a riveted joint is to make the joint
Q.6

A shaft is subjected to

  • bending stresses
  • shear stresses
  • combined bending and shear stresses
  • all of these
Q.7

Gears are casted by

  • sand mould casting
  • slush casting
  • permanent mould casting
  • centrifugal casting
Q.8

In levers, leverage is the ratio of

  • load lifted to the effort applied
  • mechanical advantage to the velocity ratio
  • load arm to the effort arm
  • effort arm to the load arm
Q.9

The stress in the bar when the load is applied suddenly is __________ as compared to the stress induced due to gradually applied loads.

  • same
  • double
  • three times
  • four times
Q.10

A triple riveted butt joint with double straps of unequal width is to be designed for a boiler shell. The pitch of the rivets in the outer row is double the pitch in the inner row and zig-zag riveting is proposed. Which of the following statement is correct?

  • There are four rivets per pitch length, all in double shear
  • There are four rivets per pitch length, out of which two are in single shear and two are in double shear
  • There are five rivets per pitch length, all in double shear
  • There are five rivets per pitch length, out of which four are in double shear and one is in single shear
Q.11

An universal coupling is a type of __________ coupling.

  • rigid
  • flexible
Q.12

In a nut and bolt, the diameter at which the ridges on the bolt are in complete touch with the ridges of the corresponding nut, is called pitch diameter.

  • Correct
  • Incorrect
Q.13

The strength of a riveted joint is equal to

  • tearing strength of plate (Pt)
  • shearing strength of rivet (Ps)
  • crushing strength of rivet (Pc)
  • least value of Pt Ps and Pc
Q.14

The form factor of a helical gear __________ with the increase in the helix angle.

  • increases
  • decreases
  • remains constant
Q.15

When a bolt is subjected to an external load, the stress induced in the bolt will be

  • tensile stress
  • shear stress
  • combined tensile and shear stress
  • any one of these
Q.16

A double strap butt joint (with equal straps) is

  • always in single shear
  • always in double shear
  • either in single shear or double shear
  • any one of these
Q.17

The taper on a rectangular sunk key is

  • 1 in 16
  • 1 in 32
  • 1 in 48
  • 1 in 100
Q.18

If the centre distance of the mating gears having involute teeth is varied within limits, the velocity ratio

  • increases
  • decreases
  • remains unchanged
Q.19

For a bevel gear having the pitch angle θ , the ratio of formative number of teeth (TE) to actual number of teeth (T) is

  • 1/sin θ
  • 1/cos θ
  • 1/tan θ
  • sin θ cos θ
Q.20

When a helical compression spring is cut into halves, the stiffness of the resulting spring will be

  • same
  • double
  • one-half
  • one-fourth
Q.21

When a helical compression spring is cut into halves, the stiffness of the resulting spring will be

  • same
  • double
  • one-half
  • one-fourth
Q.22

When carbon in the cast iron is in the form of cementite, the cast iron will be of white colour.

  • Correct
  • Incorrect
Q.23

The included angle for the British standard whitworth thread is

  • 29°
  • 47.5°
  • 55°
  • 60°
Q.24

The modulus of elasticity for mild steel is approximately equal to

  • 80 kN/mm2
  • 100 kN/mm2
  • 110 kN/mm2
  • 210 kN/mm2
Q.25

The transverse fillet welded joints are designed for

  • tensile strength
  • compressive strength
  • bending strength
  • shear strength
Q.26

Failure of a material is called fatigue when it fails

  • at the elastic limit
  • below the elastic limit
  • at the yield point
  • below the yield point
Q.27

A connecting rod subjected to an axial load may buckle with

  • X-axis as neutral axis
  • Y-axis as neutral axis
  • X-axis or Y-axis as neutral axis
  • Z-axis
Q.28

The centrifugal tension in the belt

  • increases the power transmitted
  • decreases the power transmitted
  • has no effect on the power transmitted
  • is equal to maximum tension on the belt
Q.29

If the size of a standard specimen for a fatigue testing machine is increased, the endurance limit for the material will

  • have same value as that of standard specimen
  • increase
  • decrease
Q.30

When the lubricant is forced between the journal and the bearing by external pressure, the bearing is called hydrostatic lubricated bearing.

  • Agree
  • Disagree
Q.31

The centre to centre distance between two consecutive rivets in a row, is called

  • margin
  • pitch
  • back pitch
  • diagonal pitch
Q.32

When the fulcrum is in between the load and effort, the lever is said to be of

  • first type
  • second type
  • third type
  • any one of these
Q.33

Crushing resistance required to crush the rivet per pitch length is

  • p.dc
  • p.tc
  • n.d.tc
  • (p - d)tc
Q.34

The ball bearings are, usually, made from

  • low carbon steel
  • high carbon steel
  • medium carbon steel
  • high speed steel
Q.35

Tearing resistance required to tear off the plate per pitch length is (where p = Pitch of rivets, d = Dia. of rivet hole, and σt = Permissible tensile stress for plate material)

  • p.dt
  • p.tt
  • (p - dt
  • (p - d)tt
Q.36

A bushed pin flexible coupling is used to connect two shafts whose axes intersect at a small angle.

  • Yes
  • No
Q.37

A bushed pin flexible coupling is used to connect two shafts whose axes intersect at a small angle.

  • Yes
  • No
Q.38

The V-belt is used to transmit great amount of power and when the two pulleys are very near to each other.

  • Correct
  • Incorrect
Q.39

The buttress threads have low frictional resistance characteristic of the square threads and have the same strength of V-threads.

  • Yes
  • No
Q.40

Which of the following property is essential for spring materials?

  • Stiffness
  • Ductility
  • Resilience
  • Plasticity
Q.41

A coupling used to connect two perfectly aligned shafts, is

  • muff coupling
  • compression coupling
  • flange coupling
  • all of these
Q.42

In order to have smooth operation, the minimum number of teeth on the smaller sprocket, for moderate speeds, should be

  • 15
  • 17
  • 21
  • 25
Q.43

The radial distance from the __________ to the clearance circle is called working depth.

  • addendum circle
  • dedendum circle
Q.44

Cast iron pipes are mainly used

  • for conveying steam
  • in water and sewage systems
  • in pressure lubrication systems on prime movers
  • all of the above
Q.45

The tension on the slack side of the belt is __________ the tension on the tight side of the belt.

  • equal to
  • less than
  • greater than
Q.46

A steel containing upto 0.carbon is known as

  • mild steel
  • dead mild steel
  • medium carbon steel
  • high carbon steel
Q.47

The diameter of knuckle pin in a knuckle joint is usually taken as (where d = Diameter of the rod)

  • 0.5 d
  • 0.8 d
  • d
  • 1.2 d
Q.48

For high speed engines, the cam follower should move with

  • uniform velocity
  • simple harmonic motion
  • uniform accleration and retardation
  • cycloidal motion
Q.49

The efficiency of a square threaded screw is maximum if the helix angle is equal to (where φ = Angle of friction)

  • 90° - φ
  • 45° - φ
  • 45° - φ/2
  • 45° + φ/2
Q.50

In a multiple V-belt drive, if one of the belts break, then

  • only the broken belt is replaced
  • the entire set of belts is replaced
  • the broken belt and the belt on either side of it, is replaced
  • the broken belt need not to be replaced
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