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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
Slip factor
Work factor
Degree of reaction

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Compressors, Gas Turbines and Jet Engines
An air compressor may be controlled by

Throttle control
Blow off control
Any one of the above
Clearance control

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Compressors, Gas Turbines and Jet Engines
There is a certain pressure ratio (optimum) for a gas turbine at which its thermal efficiency is maximum. With increase in turbine temperature, the value of pressure ratio for the peak efficiency would

Remain same
None of these
Decrease
Increase

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Compressors, Gas Turbines and Jet Engines
The ratio of the discharge pressure to the inlet pressure of air is called

Compression ratio
Compressor efficiency
Expansion ratio
Volumetric efficiency

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Compressors, Gas Turbines and Jet Engines
The net work input required for compressor with increase in clearance volume

Increases
Decreases
Remains same
Increases/decreases depending on compressor capacity

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Compressors, Gas Turbines and Jet Engines
Propulsion efficiency of the following order is obtained in practice

0.5
0.6
0.72
0.34

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