TRUE
FALSE
✅ The correct answer is option B.
Mechanical Engineering MCQs
The function of a flywheel is
to convert reciprocating motion of the piston into rotary motion.
to convert rotary motion of the crankshaft into to and fro motion of the valve rod
to prevent fluctuation of speed
to keep the engine speed uniform at all load conditions
✅ The correct answer is option C.
The relative humidity is defined as
the mass of water vapour present in 1 m3 of dry air
the mass of water vapour present in 1 kg of dry air
the ratio of the actual mass of water vapour in a unit mass of dry air to the mass of water vapour in the same mass of dry air when it is saturated at the same temperature and pressure.
the ratio of actual mass of water vapour in a given volume of moist air to the mass of water vapour in the same volume of saturated air at the same temperature and pressure
✅ The correct answer is option D.
Probabilistic time for completion of any activity can be found out from
optimistic time
pessimistic time
most likely time
all of these
✅ The correct answer is option D.
The resistance to fatigue of a material is measured by
elastic limit
Young’s modulus
ultimate tensile strength
endurance limit
✅ The correct answer is option D.
During sensible cooling of air __________ decreases.
wet bulb temperature
relative humidity
dry bulb temperature
specific humidity
✅ The correct answer is option C.
A small percentage of boron is added to steel in order to
increase hardenability
reduce machinability
increase wear resistance
increase endurance strength
✅ The correct answer is option A.
In order to avoid tearing of the plate at an edge, the distance from the centre line of the rivet hole to the nearest edge of the plate should be equal to (where d = Diameter of rivet hole)
d
1.5 d
2 d
2.5 d
✅ The correct answer is option B.
The effective inhibitor of pre-ignition is
alcohol
water
lead
none of these
✅ The correct answer is option B.