Basic Mechanical Engineering (3110006) MCQs

MCQs of Air Compressors

Showing 21 to 20 out of 30 Questions
1 2 3
21.
A rotary compressor is driven by an
(a) electric motor
(b) engine
(c) either A or B
(d) none of these
Answer:

Option (c)

22.
In the vane compressor, air is compressed by means of
(a) backflow from receiver only
(b) the reciprocating action of the plunger
(c) squeezing action and backflow from the receiver
(d) all of the above
Answer:

Option (c)

23.
The maximum delivery pressure in a rotary air compressor is
(a) 10 bar
(b) 20 bar
(c) 30 bar
(d) 50 bar
Answer:

Option (a)

24.
In a centrifugal compressor, the flow of air is __________ to the axis of the compressor.
(a) parallel
(b) perpendicular
(c) inclined
(d) none of these
Answer:

Option (b)

25.
If the flow of air through the compressor is parallel to its axis, then the compressor is
(a) reciprocating compressor
(b) centrifugal compressor
(c) axial flow compressor
(d) turbo-compressor
Answer:

Option (c)

26.
A compressor is a machine which is used to
(a) lift liquid from low height to higher elevation
(b) to store liquid
(c) to compress liquid OR gas
(d) none of the above
Answer:

Option (c)

27.
The compressor in which compression of air from suction pressure to delivery pressure takes place in more than one cylinder is called ______ compression.
(a) single-acting
(b) double acting
(c) single stage
(d) multi-stage
Answer:

Option (d)

28.
Scroll compressor is a _________compressor.
(a) reciprocating
(b) rotary
(c) rotodynamic
(d) none of the above
Answer:

Option (b)

29.
The centrifugal compressor is suitable for producing
(a) high pressure
(b) medium pressure
(c) low pressure
(d) all of the above
Answer:

Option (c)

30.
In roots blower, the air is compressed by means of
(a) backflow from receiver only
(b) reciprocating action of the plunger
(c) backflow from the receiver and squeezing action
(d) all of the above
Answer:

Option (a)

Showing 21 to 20 out of 30 Questions
1 2 3