radial component
tangential component
coriolis component
none of these
✅ The correct answer is option A.
Mechanical Engineering MCQs
For the same length of stroke and speed of crankshaft, the piston speed for a double acting steam engine is __________ the piston speed of single acting steam engine.
equal to
twice
three times
four times
✅ The correct answer is option B.
The buttress threads have low frictional resistance characteristic of the square threads and have the same strength of V-threads.
Yes
No
✅ The correct answer is option A.
In under damped vibrating system, if x1 and x2 are the successive values of the amplitude on the same side of the mean position, then the logarithmic decrement is equal to
log
loge
log(x1.x2)
✅ The correct answer is option B.
In a body centred cubic space lattice, there are nine atoms out of which eight atoms are located at the corners of the cube and one atom at its centre.
Yes
No
✅ The correct answer is option A.
In petrol engines, during suction stroke, __________ is drawn in the cylinder
air and fuel
only fuel
only air
none of these
✅ The correct answer is option A.
The ratio of the energy required to produce the artificial draught (expressed in metres head or J/kg of flue gas) to the mechanical equivalent of extra heat carried away per kg of flue gases due to natural draught, is known as
efficiency of the boiler
efficiency of the chimney
efficiency of the fan
power of the boiler
✅ The correct answer is option B.
Which of the following statements are true for annealing of steels?
Steels are heated to 500 to 700° C
Cooling is done slowly and steadily
Internal stresses are relieved
all of these
✅ The correct answer is option D.
The friction experienced by a body, when at rest, is known as
static friction
dynamic friction
limiting friction
coefficient of frictio
✅ The correct answer is option A.
Highest useful compression ratio (HUCR) is the highest compression ratio at which the
engine can run
engine gives maximum output
engine is most efficient
fuel can be used in a
✅ The correct answer is option D.