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Mechanical Engineering

Air motors work on the cycle which is the reverse of the reciprocating air compressor cycle.

Compressors, Gas Dynamics and Gas Turbines, Mechanical Engineering /
Question: Air motors work on the cycle which is the reverse of the reciprocating air compressor cycle.
[A].

Agree

[B].

Disagree

Answer: Option A

Explanation:

No answer description available for this question.

Air motors work on the cycle which is the reverse of the reciprocating air compressor cycle. Read More »

Compressors, Gas Dynamics and Gas Turbines, Mechanical Engineering

In reciprocating air compressors, isothermal efficiency is used for all sorts of calculations.

Compressors, Gas Dynamics and Gas Turbines, Mechanical Engineering /
Question: In reciprocating air compressors, isothermal efficiency is used for all sorts of calculations.
[A].

Correct

[B].

Incorrect

Answer: Option A

Explanation:

No answer description available for this question.

In reciprocating air compressors, isothermal efficiency is used for all sorts of calculations. Read More »

Compressors, Gas Dynamics and Gas Turbines, Mechanical Engineering

If the clearance ratio for a reciprocating air compressor is ‘K’, then its volumetric efficiency is given by

Compressors, Gas Dynamics and Gas Turbines, Mechanical Engineering /
Question: If the clearance ratio for a reciprocating air compressor is ‘K’, then its volumetric efficiency is given by
[A].

[B].

[C].

[D].

Answer: Option B

Explanation:

No answer description available for this question.

If the clearance ratio for a reciprocating air compressor is ‘K’, then its volumetric efficiency is given by Read More »

Compressors, Gas Dynamics and Gas Turbines, Mechanical Engineering

Which of the following statement is wrong?

Compressors, Gas Dynamics and Gas Turbines, Mechanical Engineering /
Question: Which of the following statement is wrong?
[A].

In a two stage reciprocating air compressor with complete intercooling, maximum work is saved.

[B].

The minimum work required for a two stage reciprocating air compressor is double the work required for each stage.

[C].

The ratio of the volume of free air delivery per stroke to the swept volume of the piston is called volumetric efficiency.

[D].

none of the above

Answer: Option D

Explanation:

No answer description available for this question.

Which of the following statement is wrong? Read More »

Compressors, Gas Dynamics and Gas Turbines, Mechanical Engineering

For a multi-stage compressor, the polytropic efficiency is constant throughout for all the stages.

Compressors, Gas Dynamics and Gas Turbines, Mechanical Engineering /
Question: For a multi-stage compressor, the polytropic efficiency is constant throughout for all the stages.
[A].

True

[B].

False

Answer: Option A

Explanation:

No answer description available for this question.

For a multi-stage compressor, the polytropic efficiency is constant throughout for all the stages. Read More »

Compressors, Gas Dynamics and Gas Turbines, Mechanical Engineering

For a two stage reciprocating compressor, compression from p1 to p3 is with perfect intercooling and no pressure losses. If compression in both the cylinders follows the same polytropic process and the atmospheric pressure is pa, then the intermediate pressure p2 is given by

Compressors, Gas Dynamics and Gas Turbines, Mechanical Engineering /
Question: For a two stage reciprocating compressor, compression from p1 to p3 is with perfect intercooling and no pressure losses. If compression in both the cylinders follows the same polytropic process and the atmospheric pressure is pa, then the intermediate pressure p2 is given by
[A].

p2 = (p1 + p3)/2

[B].

p2 = p1.p3

[C].

P2 = Pa x p3/p1

[D].

p2 = pa p3/p1

Answer: Option B

Explanation:

No answer description available for this question.

For a two stage reciprocating compressor, compression from p1 to p3 is with perfect intercooling and no pressure losses. If compression in both the cylinders follows the same polytropic process and the atmospheric pressure is pa, then the intermediate pressure p2 is given by Read More »

Compressors, Gas Dynamics and Gas Turbines, Mechanical Engineering

In a four stage compressor, if the pressure at the first and third stage are 1 bar and 16 bar, then the delivery pressure at the fourth stage will be

Compressors, Gas Dynamics and Gas Turbines, Mechanical Engineering /
Question: In a four stage compressor, if the pressure at the first and third stage are 1 bar and 16 bar, then the delivery pressure at the fourth stage will be
[A].

1 bar

[B].

16 bar

[C].

64 bar

[D].

256 bar

Answer: Option C

Explanation:

No answer description available for this question.

In a four stage compressor, if the pressure at the first and third stage are 1 bar and 16 bar, then the delivery pressure at the fourth stage will be Read More »

Compressors, Gas Dynamics and Gas Turbines, Mechanical Engineering

In n1 and n2 are the indices of compression for the first and second stage of compression, then the ratio of workdone on the first and second stages (W1/W2) with perfect intercoooing is given by

Compressors, Gas Dynamics and Gas Turbines, Mechanical Engineering /
Question: In n1 and n2 are the indices of compression for the first and second stage of compression, then the ratio of workdone on the first and second stages (W1/W2) with perfect intercoooing is given by
[A].

[B].

[C].

[D].

Answer: Option B

Explanation:

No answer description available for this question.

In n1 and n2 are the indices of compression for the first and second stage of compression, then the ratio of workdone on the first and second stages (W1/W2) with perfect intercoooing is given by Read More »

Compressors, Gas Dynamics and Gas Turbines, Mechanical Engineering