case hardening
flame hardening
nitriding
any one of these
✅ The correct answer is option C.
Mechanical Engineering MCQs
The atmospheric pressure at sea level is
103 kN/m2
10.3 m of water
760 mm of mercury
all of these
✅ The correct answer is option D.
Which of the following is a higher pair?
Belt and pulley
Turning pair
Screw pair
Sliding pair
✅ The correct answer is option A.
Balancing of rotating and reciprocating parts of an engine is necessary when it runs at
slow speed
moderate speed
highs peed
any one of these
✅ The correct answer is option C.
R-12 has the __________ freezing point.
lowest
highest
✅ The correct answer is option A.
In a riveted joint, when the number of rivets decreases from the inner most row to outer most row, the joint is said to be
chain riveted
zig-zag riveted
diamond riveted
none of these
✅ The correct answer is option C.
When the discharge pressure is too high in a refrigeration system, high pressure control is installed to stop the compressor.
Correct
Incorrect
✅ The correct answer is option A.
The capacity of a domestic refrigerator is in the range of
0.1 to 0.3 TR
1 to 3 TR
3 to 5 TR
5 to 7 TR
✅ The correct answer is option A.
A draft tube is used with impulse turbines.
Yes
No
✅ The correct answer is option B.
The formula for discharge over a sharp-crested weir and Ogee weir is same as that of a rectangular weir
Agree
Disagree
✅ The correct answer is option A.