Gas Dynamics and Gas Turbines

Question: In a single stage, single acting reciprocating air compressor, without clearance, the workdone on the air during isentropic compression is __________ the heat required to raise the temperature of air from T1 to T2 at a constant pressure.
[A].

equal to

[B].

less than

[C].

greater than

Answer: Option A

Explanation:

No answer description available for this question.

Question: The air power of the compressor is also known as
[A].

indicated power

[B].

brake power

[C].

frictional power

[D].

none of these

Answer: Option A

Explanation:

No answer description available for this question.

Question: In a single acting reciprocating air compressor, without clearance, the compression of air may be
[A].

isothermal

[B].

polytropic

[C].

isentropic

[D].

any one of these

Answer: Option D

Explanation:

No answer description available for this question.

Question: In a single stage, single acting reciprocating air compressor without clearance volume, the workdone is maximum during
[A].

isothermal compression

[B].

isentropic compression

[C].

polytropic compression

[D].

none of these

Answer: Option B

Explanation:

No answer description available for this question.

Question: In a single stage, single acting reciprocating air compressor, without clearance volume, the workdone is minimum during
[A].

isothermal compression

[B].

isentropic compression

[C].

polytropic compression

[D].

none of these

Answer: Option A

Explanation:

No answer description available for this question.

Question: In a single acting reciprocating compressor, the suction, compression and delivery of air takes place in __________ of the piston.
[A].

one stroke

[B].

two strokes

[C].

three strokes

[D].

four strokes

Answer: Option B

Explanation:

No answer description available for this question.

Question: In air compressors, free air delivery means the
[A].

actual volume of the air delivered by the compressor when reduced to normal temperature and pressure conditions

[B].

volume of air delivered by the compressor

[C].

volume of air sucked by the compressor during its suction stroke

[D].

none of the above

Answer: Option A

Explanation:

No answer description available for this question.

Question: The capacity of a compressor is expressed in
[A].

kg/m2

[B].

kg/m3

[C].

m3/min

[D].

m3/kg

Answer: Option C

Explanation:

No answer description available for this question.

Question: Free air is the air at atmospheric conditions at any specific location.
[A].

True

[B].

False

Answer: Option A

Explanation:

No answer description available for this question.

Question: A compressor must be driven by some prime mover.
[A].

Agree

[B].

Disagree

Answer: Option A

Explanation:

No answer description available for this question.