[A]. 1/RN
[B]. 4/RN
[C]. 16/RN
[D]. 64/RN
✅ The correct answer is option C.
Mechanical Engineering MCQs
The primary unbalanced force is maximum when the angle of inclination of the crank with the line of stroke is
[A]. 0° and 90°
[B]. 0° and 180°
[C]. 90° and 180°
[D]. 180° and 360°
✅ The correct answer is option B.
In vibration isolation system, the transmissibility will be equal to unity, for all values of damping factor, if ω/ωn is
[A]. equal to one
[B]. equal to 2
[C]. less than 2
[D]. greater than 2
✅ The correct answer is option B.
When the speed of the pump increases, its net positive suction head (NPSH) requirement decreases.
[A]. Agree
[B]. Disagree
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✅ The correct answer is option B.
The unit of angular acceleration is
[A]. N-m
[B]. m/s
[C]. m/s2
[D]. rad/s2
✅ The correct answer is option D.
In an external mouthpiece, the absolute pressure head at vena contracta is __________ the atmospheric pressure head by an amount equal to 0.89 times the height of the liquid, above the vena contracta.
[A]. less than
[B]. more than
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✅ The correct answer is option A.
The power transmitted through a pipe is (where w = Specific weight in N/m3, and Q = Discharge in m3/s)
[A]. w x Q x H
[B]. w x Q x hf
[C]. w x Q (H – hf)
[D]. w x Q (H + hf)
✅ The correct answer is option C.
The secondary fuel used in nuclear power plants is
[A]. U233 and Pu239
[B]. U235 and Th232
[C]. U235 and Pu238
[D]. U233 and Pu238
✅ The correct answer is option A.
The centre of gravity of the volume of the liquid displaced is called
[A]. centre of pressure
[B]. centre of buoyancy
[C]. metacentre
[D]. none of these
✅ The correct answer is option B.
In a free nappe,
[A]. the pressure below the nappe is atmospheric
[B]. the pressure below the nappe is negative
[C]. the pressure above the nappe is atmospheric
[D]. the pressure above the nappe is negative
✅ The correct answer is option A.