TRUE
FALSE
✅ The correct answer is option B.
Mechanical Engineering MCQs
The mode of deformation of the metal during spinning is
bending
stretching
rolling and stretching
bending and stretching
✅ The correct answer is option D.
The theoretical indicator diagram of a simple steam engine is based upon the assumption that
there is no pressure drop due to condensation
steam is admitted at boiler pressure and exhausted at condenser pressure
the expansion (or compression) of the steam is hyperbolic
all of the above
✅ The correct answer is option D.
The critical pressure of a liquid is the pressure
above which a liquid will remain a liquid
above which a liquid will explode
above which a liquid will always convert into a vapour
below which a liquid w
✅ The correct answer is option A.
The increase in pressure at the outer edge of a drum of radius (r) completely filled up with liquid of density (ρ) and rotating at (ω) rad/s is
ρ ω2 r2
2ρ ω2 r2
✅ The correct answer is option C.
The heat supplied to the gaS at constant volume is (where m = Mass of gas, cv = Specific heat at constant volume, cp = Specific heat at constant pressure, T2 – T1 = Rise in temperature, and R = Gas constant)
mR(T2 – T1)
mcv(T2 – T1)
mcp(T2 – T1)
mcp(T2 + T1)
✅ The correct answer is option B.
There is always some steam left in the clearance space from the previous stroke. This steam left in the clearance space is called
wet steam
saturated steam
superheated steam
cushion steam
✅ The correct answer is option D.
Tandem drawing of wires and tubes is necessary because
it is not possible to reduce at one stage
annealing is needed between stages
accuracy in dimensions is not possible otherwise
surface finish improve
✅ The correct answer is option B.
The velocity of flow is same at all points in the cross-section of a channel.
TRUE
FALSE
✅ The correct answer is option B.