more
less
✅ The correct answer is option B.
Mechanical Engineering MCQs
The temperature of the inner luminous cone of neutral flame is about
1000° C
1250° C
2100° C
3200° C
✅ The correct answer is option D.
Which of the following refrigerant has the lowest freezing point?
R-11
R-12
R-22
Ammonia
✅ The correct answer is option C.
The hole to be drilled for tapping is __________ the outside diameter of the thread on the tap.
equal to
smaller than
greater than
✅ The correct answer is option B.
The knocking tendency in spark ignition engines may be decreased by
controlling the air-fuel mixture
controlling the ignition timing
controlling the exhaust temperature
reducing the compressi
✅ The correct answer is option D.
One molecule of oxygen is __________ times heavier than the hydrogen atom.
12
14
16
32
✅ The correct answer is option D.
The specific gravity of petrol is about
0.75
0.85
0.95
1.25
✅ The correct answer is option A.
The draught in locomotive boilers is produced by a
chimney
centrifugal fan
steam jet
none of these
✅ The correct answer is option C.
Trepanning is an operation of
making a cone-shaped enlargement of the end of a hole
smoothing and squaring the surface around a hole
sizing and finishing a small diameter hole
producing a hole by re
✅ The correct answer is option D.
In centreless grinding, work place centre will be
above the line joining the two wheel centres
below the line joining the two wheel centres
on the line joining the two wheel centres
at the intersection of
✅ The correct answer is option A.