Correct
Incorrect
✅ The correct answer is option B.
Mechanical Engineering MCQs
The hard coke is obtained when carbonisation of coal is carried out at
300° to 500°C
500° to700°C
700° to 900°C
900° to 1100°C
✅ The correct answer is option D.
In an internal mouthpiece, the absolute pressure head at vena contracta is __________ the atmospheric pressure head by an amount equal to height of the liquid above the vena contracta.
less than
more than
✅ The correct answer is option A.
The capacity and working pressure.of a Cornish boiler is __________ as compared to Lancashire boiler.
low
high
✅ The correct answer is option A.
When a vertical wall is subjected to pressures due to liquid on both sides, the resultant pressure is the __________ of the two pressures.
sum
difference
arithmatic mean
geometric mean
✅ The correct answer is option B.
The artificial draught is produced by
steam jet
centrifugal fan
chimney
both (a) and (b)
✅ The correct answer is option D.
The motion of a particle round a fixed axis is
translatory
rotary
circular
translatory as well as
✅ The correct answer is option C.
If the modulus of elasticity of a material is twice its modulus of rigidity, then the Poisson’s ratio of the material is equal to zero.
Correct
Incorrect
✅ The correct answer is option A.
The coefficient of discharge is the ratio of theoretical discharge to the actual discharge through an orifice.
TRUE
FALSE
✅ The correct answer is option B.
The velocity of tool along the tool face is known as
shear velocity
chip velocity
cutting velocity
mean velocity
✅ The correct answer is option B.