✅ The correct answer is option D.
Mechanical Engineering MCQs
Conduction is a process of heat transfer
from one particle of the body to another without the actual motion of the particles
from one particle of the body to another by the actual motion of the heated particles.
from a hot body to a cold body, in a straight line, without affecting the intervening medium
none of the above
✅ The correct answer is option A.
The secondary unbalanced force is maximum when the angle of inclination of the crank with the line of stroke is
0° and 90°
180° and 360°
both (a) and (b)
none of these
✅ The correct answer is option C.
In a vapour absorption refrigeration system, the compressor of the vapour compression system is replaced by
liquid pump
generator
absorber and generator
absorber, generator an
✅ The correct answer is option D.
The function of guide vanes in a reaction turbine is to
allow the water to enter the runner without shock
allow the water to flow over them, without forming eddies
allow the required quantity of water to enter the turbine
all of the above
✅ The correct answer is option D.
The surface to be left unmachined is marked on the pattern by
red colour
yellow colour
black colour
blue colour
✅ The correct answer is option C.
Fourier’s law of heat conduction gives the heat flow for
irregular surfaces
non-uniform temperature surfaces
one dimensional cases only
two dimensional cases
✅ The correct answer is option C.
The air standard efficiency of an Otto cycle is given by (where r = Compression ratio, and γ = Ratio of specific heats)
1 – rγ – 1
1 + rγ – 1
✅ The correct answer is option C.
A good fuel should have __________ ignition point.
high
low
✅ The correct answer is option B.
A cycle consisting of two constant pressure and two isentropic processes is known as
Carnot cycle
Stirling cycle
Otto cycle
none of these
✅ The correct answer is option D.