Which is false statement about multistage compression?

The advantage of multistage compression over single stage compression is

A

Lower power consumption per unit of air delivered

B

Higher volumetric efficiency

C

Decreased discharge temperature

D

All of the above

For minimum work in multistage compression, assuming same index of compression in all stages

A

Work done in first stage should be more

B

Work done in subsequent stages should increase

C

Work done in subsequent stages should decrease

D

Work done in all stages should be equal

Multistage compression of air as compared to single stage compression offers the advantage of

A

Power saving per unit weight of air delivered

B

Moisture elimination in the inter-stage cooler

C

Increased volumetric efficiency

D

All of the above

In multistage compressor, the isothermal compression is achieved by

A

Employing inter-cooler

B

By constantly cooling the cylinder

C

By running compressor at very slow speed

D

By insulating the cylinder

For minimum work required to compress and deliver a quantity of air by multistage compression

A

The compression ratio in each stage should be same

B

The intercooling should be perfect

C

The work-done in each stage should be same

D

All of the above

Multistage compression is necessary for high efficiency,

A

If the ratio of the delivery pressure to the intake pressure exceeds 5:1

B

When large amount of gas is to be compressed

C

When the delivered gas is desired at very high velocity

D

None of these

Which is false statement about advantages of multistage compressor in comparison to single stage compressor?

A

Less power requirement

B

Better mechanical balance

C

Less loss of air due to leakage past the cylinder

D

Lower volumetric efficiency

The total gain of a multistage amplifier is less than the product of the gains of individual stages due to ___________

A

Power loss in the coupling device

B

Loading effect of the next stage

C

The use of many transistors

D

The use of many capacitors

The cascade amplifier is a multistage configuration of

A

CC-CB

B

CE-CB

C

CB-CC

D

CE-CC

In the initial stages of a multistage amplifier, we use ___________

A

RC coupling

B

Transformer coupling

C

Direct coupling

D

None of the above

Which is false statement about multistage compression?

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