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

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 a two stage compressor, if index of compression for higher stage is greater than index of compression for lower stage, then the optimum pressure as compared to ideal case will

A

Increase

B

Decrease

C

Remain unaffected

D

Other factors control it

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

The bandwidth of a single stage amplifier is ___________ that of a multistage amplifier

A

More than

B

The same as

C

Less than

D

Data insufficient

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

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

The output stage of a multistage amplifier usually employs ___________

A

Push-pull amplifier

B

Preamplifier

C

Class A power amplifier

D

None of the above

The final stage of a multistage amplifier uses ___________

A

RC coupling

B

Transformer coupling

C

Direct coupling

D

Impedance coupling

The output stage of a multistage amplifier is also called ___________

A

Mixer stage

B

Power stage

C

Detector stage

D

F stage

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

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

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