engine piston
engine cylinder
lubricating oil
jacket cooling water
✅ The correct answer is option D.
Mechanical Engineering MCQs
The rectangular beam ‘A ‘ has length l, width b and depth d. Another beam ‘B’ has the same width and depth but length is double that of ‘A’. The elastic strength of beam ‘B’ will be __________ as compared to beam A.
same
one-half
one-fourth
one-eighth
✅ The correct answer is option B.
A Bell Coleman refrigerator working on dense air system as compared to open air system, for the same range of temperature, results in __________ power per tonne of refrigeration.
same
lower
higher
✅ The correct answer is option B.
The moment of inertia of a solid cylinder of mass m, radius r and length l about the longitudinal axis or polar axis is
mr2/2
mr2/4
mr2/6
mr2/8
✅ The correct answer is option A.
A steel is heated at about 875° C where the structure consists of entirely austenite. It is then cooled suddenly at a temperature of about 250° C to 525° C. This process of heat treatment is known as
normalising
annealing
austempering
martempering
✅ The correct answer is option C.
The rate of change of displacement of a body is called
velocity
acceleration
momentum
none of these
✅ The correct answer is option A.
The angle between the face of the tool and a line tangent to the machined surface at the cutting point is called cutting angle.
Correct
Incorrect
✅ The correct answer is option A.
Which of the following is a pendulum type governor?
Watt governor
Porter governor
Hartnell governor
none of these
✅ The correct answer is option A.
The strain energy stored in a body, when suddenly loaded, is __________ the strain energy stored when same load is applied gradually.
equal to
one-half
twice
four times
✅ The correct answer is option D.
The speed of rotary air compressor is __________ as compared to reciprocating air compressor.
high
low
✅ The correct answer is option A.