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Compressors, Gas Turbines and Jet Engines

Compressors, Gas Turbines and Jet Engines
Standard air is the air at ___ and relative humidity of 36 percent.

1 bar and 40°C
1 bar and 20°C
0.1 bar and 40°C
0.1 bar and 20°C

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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?

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

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Compressors, Gas Turbines and Jet Engines
Inter cooling in compressors

Results in saving of power in compressing a given volume to given pressure
Enables compression in two stages
Is the standard practice for big compressors
Cools the delivered air

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Compressors, Gas Turbines and Jet Engines
A centrifugal compressor works on the principle of

Conversion of pressure energy into kinetic energy
Centripetal action
Generating pressure directly
Conversion of kinetic energy into pressure energy

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Compressors, Gas Turbines and Jet Engines
The minimum work required for a three stage reciprocating air compressor is ___ the work required for each stage.

Equal to
Double
Six times
Three times

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Compressors, Gas Turbines and Jet Engines
In a centrifugal compressor, the flow of air is ________ to the axis of compressor.

Perpendicular
None of these
Inclined
Parallel

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