ω2R cos θ
ω2(R – r1)cos θ
ω2(R – r1)sin θ
ω2r1 sin θ
✅ The correct answer is option B.
Mechanical Engineering MCQs
Two closely-coiled helical springs ‘A’ and ‘B’ are equal in all respects but the number of turns of spring ‘A’ is double that of spring ‘B’. The stiffness of spring ‘A’ will be __________ that of spring ‘B’.
one-sixteenth
one-eighth
one-fourth
one-half
✅ The correct answer is option D.
The volume per unit mass of a liquid is called specific volume.
Yes
No
✅ The correct answer is option A.
The main cause for the irreversibility is
mechanical and fluid friction
unrestricted expansion
heat transfer with a finite temperature difference
all of the above
✅ The correct answer is option D.
The slow cooling of steel from the __________ results in a coarse grained structure.
lower critical point
upper critical point
✅ The correct answer is option B.
The cutting speed for counter-boring should be __________ that of drilling operation.
equal to
less than
greater than
✅ The correct answer is option C.
The critical pressure ratio for initially dry saturated steam is
0.546
0.577
0.582
0.601
✅ The correct answer is option B.
When a thin cvlindrical shell is subjected to an internal pressure, the volumetric strain is (where ε1 = Hoop strain, and ε2 = Longitudinal strain)
2ε1 – ε2
2ε1 + ε2
2ε2 – ε1
2ε2 + ε1
✅ The correct answer is option B.
The total energy line lies over the centre line of the pipe by an amount equal to
pressure head
velocity head
pressure head + velocity head
pressure head – veloci
✅ The correct answer is option C.