[A]. inlet and thoroat
[B]. inlet and outlet
[C]. throat and exit
[D]. all of these
✅ The correct answer is option C.
Mechanical Engineering MCQs
In a reciprocating air compressor, the compression work per kg of air
[A]. increases as clearance volume increases
[B]. decreases as clearance volume increases
[C]. is independent of clearance volume
[D]. increases as clearance volume decreases
✅ The correct answer is option C.
The difference between dry bulb temperature and wet bulb temperature, is called
[A]. dry bulb depression
[B]. wet bulb depression
[C]. dew point depression
[D]. degree of saturation
✅ The correct answer is option B.
The facing is an operation of
[A]. bevelling the extreme end of a workpiece
[B]. embossing a diamond shaped pattern on the surface of a workpiece
[C]. reducing the diameter of a workpiece over a very narrow surface
[D]. machining the ends of a workpiece to produce a flat surface square with the axis
✅ The correct answer is option D.
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
✅ The correct answer is option A.
The maximum diameter of the hole that can be punched from a plate of maximum shear stress 1/4th of its maximum crushing stress of punch, is equal to (where t = Thickness of the plate)
[A]. t
[B]. 2t
[C]. 4t
[D]. 8t
✅ The correct answer is option C.
The efficiency of a Pelton wheel working under constant head __________ with the increase in power.
[A]. remains same
[B]. increases
[C]. decreases
null
✅ The correct answer is option B.
The maximum frictional force, which comes into play, when a body just begins to slide over the surface of the other body, is known as
[A]. static friction
[B]. dynamic friction
[C]. limiting friction
[D]. coefficient of friction
✅ The correct answer is option C.
The breast water wheels are those in which the wheel runs partly by the weight of water and partly by the impulse of water.
[A]. True
[B]. False
null
null
✅ The correct answer is option A.
The angle of inclination of a vehicle when moving along a circular path __________ upon its mass.
[A]. depends
[B]. does not depend
null
null
✅ The correct answer is option B.