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Compressors, Gas Turbines and Jet Engines

Compressors, Gas Turbines and Jet Engines
In an axial flow compressor, the ratio of pressure in the rotor blades to the pressure rise in the compressor in one stage is known as

Pressure coefficient
Work factor
Degree of reaction
Slip factor

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Compressors, Gas Turbines and Jet Engines
Adiabatic compression is one in which

Work done is maximum
Temperature rise follows a linear relationship
Temperature during compression remains constant
No heat leaves or enters the compressor cylinder during compression

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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?

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

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Compressors, Gas Turbines and Jet Engines
Surging is the phenomenon of

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

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Compressors, Gas Turbines and Jet Engines
The closed cycle in gas turbines

In never used
Provides lesser flexibility
Is used when gas is to be burnt
Provides greater flexibility

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Compressors, Gas Turbines and Jet Engines
The ratio of the indicated power to the shaft power or brake power of the motor or engine required to drive the compressor, is called

Compressor efficiency
Mechanical efficiency
Volumetric efficiency
Isothermal efficiency

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