Correct
Incorrect
✅ The correct answer is option A.
Mechanical Engineering MCQs
One Joule (J) is equal to
1 N-m
1 kN-m
10 N-m/s
10 kN-m/s
✅ The correct answer is option A.
A pressure vessel is said to be a thick shell, when
it is made of thick sheets
the internal pressure is very high
the ratio of wall thickness of the vessel to its diameter is less than 1/10.
the ratio of wall thic
✅ The correct answer is option D.
The pressure compounded impulse turbine as compared to velocity compounded turbine require __________ number of stages.
same
less
more
✅ The correct answer is option C.
Which of the following is the correct statement?
For a given compression ratio, both Otto and Diesel cycles have the same efficiency.
For a given compression ratio, Otto cycle is more efficient than Diesel cycle.
For a given compression ratio, Diesel cycle is more efficient than Otto cycle.
The efficiency of Otto
✅ The correct answer is option B.
In collision of elastic bodies, the coefficient of restitution is the ratio of the relative velocity after impact to the relative velocity before impact.
TRUE
FALSE
✅ The correct answer is option A.
The unit of Stefan-Boltzmann constant is
Watt/mK
Watt/m2K2
Watt/m2K4
Watt/mK2
✅ The correct answer is option C.
The total energy of a liquid particle in motion is equal to
pressure energy + kinetic energy + potential energy
pressure energy – (kinetic energy + potential energy)
potential energy – (pressure energy + kinetic energy
kinetic energy – (pres
✅ The correct answer is option A.
In machining metal, cutting force at the cutting edge is measured by a
wattmeter
dynamometer
hydrometer
pyrometer
✅ The correct answer is option B.
A Cochran boiler is a horizontal multi-tubular boiler.
Yes
No
✅ The correct answer is option B.