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Compressors, Gas Turbines and Jet Engines

Compressors, Gas Turbines and Jet Engines
The type of rotary compressor used in aeroplanes, is of

Centrifugal type
Axial flow type
None of these
Radial flow type

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Compressors, Gas Turbines and Jet Engines
Which is false statement about advantages of multistage compressor in comparison to single stage compressor?

Lower volumetric efficiency
Better mechanical balance
Less loss of air due to leakage past the cylinder
Less power requirement

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Compressors, Gas Turbines and Jet Engines
If the flow of air through the compressor is perpendicular to its axis, then it is a

Reciprocating compressor
Axial flow compressor
Turbo compressor
Centrifugal compressor

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Compressors, Gas Turbines and Jet Engines
Isothermal compression efficiency, even when running at high speed, can be approached by using

Fully insulating the cylinder
Both (A) and (B) above
Multistage compression
Cold water spray

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Compressors, Gas Turbines and Jet Engines
The volumetric efficiency for reciprocating air compressors is about

40 to 60%
60 to 70%
10 to 40%
70 to 90%

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Compressors, Gas Turbines and Jet Engines
The mass of gas turbine per kW developed is about ________ as that of an I.C. engine.

One-half
Same
One fourth
One sixth

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