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Compressors, Gas Turbines and Jet Engines

Compressors, Gas Turbines and Jet Engines
The efficiency of roots blower ________ with the increase in pressure ratio.

None of these
Increases
Does not change
Decreases

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Compressors, Gas Turbines and Jet Engines
An air receiver is to be placed outside. Should it be placed in

Shade
Rain
Sun
Enclosed room

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Compressors, Gas Turbines and Jet Engines
Stalling of blades in axial flow compressor is the phenomenon of

Unsteady periodic and reversed flow
Air stream not able to follow the blade contour
Motion of air at sonic velocity
Air stream blocking the passage

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

Radial flow type
None of the listed here
Axial flow type
Centrifugal type

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Compressors, Gas Turbines and Jet Engines
In a single stage, single acting reciprocating air compressor, without clearance volume, the work-done is minimum during

None of these
Isentropic compression
Isothermal compression
Polytropic compression

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Compressors, Gas Turbines and Jet Engines
The temperature of air at the beginning of the compression stroke is ________ the atmospheric temperature.

None of these
Equal to
More than
Less than

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