unbalanced couples are caused only at higher speeds
unbalanced forces are not dangerous at higher speeds
effects of unbalances are proportional to the square of the speed
effects of unbalances
✅ The correct answer is option C.
Mechanical Engineering MCQs
The greater the pressure difference in throttling, the lesser is the irreversibility.
Yes
No
✅ The correct answer is option B.
The damper fluid leakage typically occur from
upper damper mounting
bottom of damper
clearance between inner and outer tubes of damper
coil spring mounting
✅ The correct answer is option C.
A pattern is used to make the mould cavity for pouring the molten metal for casting.
Yes
No
✅ The correct answer is option A.
Which is the incorrect statement about Carnot cycle?
It is used as the alternate standard of comparison of all heat engines.
All the heat engines are based on Carnot cycle.
It provides concept of maximising work output between the two temperature limits.
all of the above
✅ The correct answer is option B.
The ratio of brake power to the indicated power is known as
mechanical efficiency
overall efficiency
indicated thermal efficiency
brake thermal efficien
✅ The correct answer is option A.
The shear force of a cantilever beam of length l carrying a uniformly distributed load of w per unit length is __________ at the free end.
zero
wl/4
wl/2
wl
✅ The correct answer is option A.
In order to double the period of simple pendulum, the length of the string should be
halved
doubled
quadrupled
✅ The correct answer is option C.
For gas welding, the pressure desired at the welding torch for oxygen is
7 to 103 kN/m2
70 to 280 kN/m2
280 to 560 kN/m2
560 to 840 kN/m2
✅ The correct answer is option B.
The efficiency of a screw jack is maximum, when (where α = Helix angle, and φ = Angle of friction)
α = 45° +
α = 45° –
α = 90° + φ
α = 90° – φ
✅ The correct answer is option B.