increases the power transmitted
decreases the power transmitted
has no effect on the power transmitted
is equal to maximum te
✅ The correct answer is option C.
Mechanical Engineering MCQs
In electric resistance welding, voltage required for heating is
1 to 5 volts
6 to 10 volts
11 to 20 volts
50 to 100 volts
✅ The correct answer is option B.
The unit of mass moment of inertia in S.I. units is kg-m2.
TRUE
FALSE
✅ The correct answer is option A.
The loss of head at exit of a pipe is
✅ The correct answer is option A.
The ratio of heat extracted in the refrigerator to the workdone on the refrigerant is called
coefficient of performance of refrigeration
coefficient of performance of heat pump
relative coefficient of performance
refrigerating efficien
✅ The correct answer is option A.
Which of the following statement is correct according to Clausis statement of second law off thermodynamics?
It is possible to transfer heat from a body at a lower temperature to a body at a higher temperature.
It is impossible to transfer heat from a body at a lower temperature to a body at a higher temperature, without the aid of an external source.
It is possible to transfer heat from a body at a lower temperature to a body at a higher temperature by using refrigeration cycle.
none of the above
✅ The correct answer is option B.
One kg of ethylene (C2H4) requires 2 kg of oxygen and produces 22/7 kg of carbon dioxide and __________ kg of water or steam.
9-Jul
11-Jul
7-Apr
11-Apr
✅ The correct answer is option A.
In a four high rolling mill, the diameter of backing up rolls is __________ the diameter of working rolls.
equal to
smaller than
larger than
✅ The correct answer is option C.
In a Hartnell governor, the lift of the sleeve is given by (where r1 and r2 = Max. and min. radii of rotation, x = Length of ball arm of the lever, and y = Length of sleeve arm of the lever)
(r1 + r2)
(r1 + r2)
(r1 – r2)
(r1 – r2)
✅ The correct answer is option C.
Which of the following metal shrinks most from molten state to solid state?
Cast iron
Cast steel
Brass
Admirality metal
✅ The correct answer is option D.