TRUE
FALSE
✅ The correct answer is option B.
Mechanical Engineering MCQs
When the crank is at the inner dead centre, in a reciprocating steam engine, then the acceleration of the piston will be
✅ The correct answer is option A.
A circular hole of 50 mm diameter is cut out from a circular disc of 100 mm diameter as shown in the below figure. The centre of gravity of the section will lie
in the shaded area
in the hole
at O
✅ The correct answer is option A.
When a bolt and nut is made of mild steel, then the effective height of nut is made equal to (where d = Nominal diameter of bolt)
0.5 d
0.75 d
d
1.25 d
✅ The correct answer is option C.
The lower pairs are __________ pairs.
self-closed
force-closed
✅ The correct answer is option A.
The neutral axis of a transverse section of a beam passes through the centre of gravity of the section and is
in the vertical plane
in the horizontal plane
in the same plane in which the beam bends
at right angle to the
✅ The correct answer is option D.
At the nodal point in a shaft, the amplitude for torsional vibration will be
minimum
maximum
zero
infinity
✅ The correct answer is option C.
When the speed of belt increases,
the coefficient of friction between the belt and pulley increases
the coefficient of friction between the belt and pulley decreases
the power transmitted will decrease
the power transmitted
✅ The correct answer is option C.
The ratio of heat actually used in producing the steam to the heat liberated in the furnace is known as equivalent evaporation from and at 100° C.
Correct
Incorrect
✅ The correct answer is option B.