the atmosphere
a source at 0° C
a source of low temperature air
a source of high tempe
✅ The correct answer is option C.
Engineering MCQs
The function of a D-slide valve is to exhaust steam from the cylinder at proper moment.
Correct
Incorrect
✅ The correct answer is option A.
By decreasing the highest temperature in the Carnot cycle, its efficiency is increased.
TRUE
FALSE
✅ The correct answer is option B.
The pressure of feed water has to be raised before its entry into the boiler. The pressure is raised by a device known as
feedpump
injector
feed check valve
pressure gauge
✅ The correct answer is option A.
A thin cylindrical shell of diameter (d) length (l) and thickness (t) is subjected to an internal pressure (p). The longitudinal stress in the shell is
pd/t
pd/2t
pd/4t
pd/6t
✅ The correct answer is option C.
Carnot cycle has maximum efficiency for
petrol engine
diesel engine
reversible engine
irreversible engine
✅ The correct answer is option C.
The reconditioning process used to give cylinder bore surfaces a cross-hatch pattern, is known as
honing
porous plating
boring
shot peening
✅ The correct answer is option A.
The effect of vapour locking on the brake performance is that the
brakes function more effectively
brakes fail completely
brake operation is delayed after depression of the brake pedal
vapour locking has no
✅ The correct answer is option B.
Clutch facings are usually attached to the plate by
steel rivets
brass rivets
aluminium screws
steel screws
✅ The correct answer is option B.
The velocity of the reciprocating roller follower when it has contact with the straight flanks of the tangent cam, is given by (where ω = Angular velocity of the cam shaft)
ω(r1 – r2)sin θ
ω(r1 + r2)sinθ sec2θ
ω(r1 – r2)cos θ
ω(r1 + r2)cos θ cosec2
✅ The correct answer is option B.