COMPRESSORS, GAS TURBINES AND JET ENGINES QUIZ

If the flow of air through the compressor is perpendicular to its axis, then it is a

Axial flow compressor

Reciprocating compressor

Turbo compressor

Centrifugal compressor

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A jet engine has

Propeller in front

No propeller

Propeller on the top

Propeller at back

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An air compressor may be controlled by

Any one of the above

Clearance control

Blow off control

Throttle control

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In jet engines, paraffin is usually used as the fuel because of its

Ease of atomisation

High calorific value

Both (A) and (C) above

Low freezing point

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The air power of the compressor is also known as

None of these

Indicated power

Brake power

Frictional power

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Maximum work is done in compressing air when the compression is

Polytropic

None of these

Adiabatic

Isothermal

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Mining industry usually employs following motive power

C. electric motor

Compressed air

Petrol engine

Diesel engine

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Reheating in multistage expansion gas turbine results in

Maximum work output

Reduction in compressor work

High thermal efficiency

Decrease of heat loss in exhaust

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When air is to be compressed at a high pressure, then it is advantageous to use

Multistage compression without intercooling

Single stage compression

Multistage compression with intercooling

None of these

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An after-cooler is used to

Remove impurities from air

Cause moisture and oil vapour to drop out

Cool the air

Reduce volume of air

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