increased to a value above its critical temperature
reduced to a value below its critical temperature
equal to critical temperature
none of the above
✅ The correct answer is option C.
Mechanical Engineering MCQs
Which of the following is a fire tube boiler ?
Lansashire boiler
Babcock and Wilcox boiler
Yarrow boiler
none of these
✅ The correct answer is option A.
In the below figure, __________ represents glass.
curve A
curve B
curve C
curve D
✅ The correct answer is option C.
Shear strength of the welded joint for double parallel fillet is (where τ = Allowable shear stress for weld metal)
0.5 s.l.τ
s.l.τ
2 s.l.τ
2.s.l.τ
✅ The correct answer is option C.
The total head of a liquid particle in motion is equal to
pressure head + kinetic head + potential head
pressure head – (kinetic head + potential head)
potential head – (pressure head + kinetic head)
kinetic head – (pressu
✅ The correct answer is option A.
When a circular bar tapering uniformly from diameter d1, at one end to diameter d2 at the other end, is subjected to an increase in temperature (t), then the thermal stress induced is (where α = Coefficient of linear expansion, and E = Modulus of elasticity for the bar material)
✅ The correct answer is option A.
For a multi-stage compressor, the polytropic efficiency is constant throughout for all the stages.
TRUE
FALSE
✅ The correct answer is option A.
The cutting speed of a drill varies from point to point on the cutting edge of the drill.
Correct
Incorrect
✅ The correct answer is option A.
The compressor capacity will be __________ if the temperature of intake air is lowest.
lowest
highest
✅ The correct answer is option B.
A hemispherical tank of radius (R) containing liquid upto height (H1) has an orifice of cross-sectional area (a) at its bottom. The time required to lower the level of liquid from (H1) to (H2) will be
none of the above
✅ The correct answer is option C.