Agree
Disagree
✅ The correct answer is option A.
Mechanical Engineering MCQs
The minimum size of a bloom is
5 cm x 5 cm
10 cm x 10 cm
15 cm x 15 cm
20 cm x 20 cm
✅ The correct answer is option C.
When the end of a tap is tapered for about three or four threads, it is known as a
taper tap
bottoming tap
second tap
none of these
✅ The correct answer is option C.
The heating of a gas at constant pressure is governed by
Boyle’s law
Charles’ law
Gay-Lussac law
Avogadro’s law
✅ The correct answer is option B.
The condition of refrigerant as it leaves the compressor in a vapour compression system is
saturated liquid
wet vapour
dry saturated vapour
superheated vapour
✅ The correct answer is option D.
The workdone on a compressor will be minimum if air is taken from
the atmosphere
a source at 0° C
a source of low temperature air
a source of high tempe
✅ The correct answer is option C.
The function of a D-slide valve is to exhaust steam from the cylinder at proper moment.
Correct
Incorrect
✅ The correct answer is option A.
By decreasing the highest temperature in the Carnot cycle, its efficiency is increased.
TRUE
FALSE
✅ The correct answer is option B.
The pressure of feed water has to be raised before its entry into the boiler. The pressure is raised by a device known as
feedpump
injector
feed check valve
pressure gauge
✅ The correct answer is option A.