1-Feb
1
2
4
✅ The correct answer is option D.
Mechanical Engineering MCQs
A railway bridge is an example of a machine.
TRUE
FALSE
✅ The correct answer is option B.
It is desired to condition the outside air from 70% relative humidity and 45° C dry bulb temperature to 50% relative humidity and 25° C dry bulb temperature (room condition). The practical arrangement will be
dehumidification
cooling and humidification
cooling and dehumidification
dehumidification and p
✅ The correct answer is option C.
In designing a key, it is assumed that the distribution of forces along the length of key
varies linearly
is uniform throughout
varies exponentially, being more at the torque-input end
varies exponentially,
✅ The correct answer is option B.
An economiser is generally placed between
last superheater or reheater and air preheater
induced draft fan and forced draft fan
air preheater and chimney
none of the above
✅ The correct answer is option A.
For maximum work, the reheating should be done to an intermediate pressure of (where p1 = Maximum pressure, and p2 = Minimum pressure)
p1p2
✅ The correct answer is option D.
Broaching is applied for machining
internal and external surfaces
round or irregular shaped holes
external flat and contoured surfaces
all of these
✅ The correct answer is option D.
The product of Reynolds number and Prandtl number is known as
Stanton number
Biot number
Peclet number
Grashoff number
✅ The correct answer is option C.
The discharge through a reaction turbine __________ with the increase in unit speed.
remains same
increases
decreases
✅ The correct answer is option C.
PERT stands for
Programme Estimation and Reporting Technique
Process Estimation and Review Technique
Programme Evaluation and Review Technique
Planning Estimation an
✅ The correct answer is option C.