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Compressors, Gas Turbines and Jet Engines

Compressors, Gas Turbines and Jet Engines
The volumetric efficiency of a compressor falls roughly as follows for every 5°C increase in atmospheric temperature

0.001
0.01
0.05
0.005

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Compressors, Gas Turbines and Jet Engines
For a two stage compressor, if index of compression for higher stage is greater than index of compression for lower stage, then the optimum pressure as compared to ideal case will

Decrease
Other factors control it
Remain unaffected
Increase

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Compressors, Gas Turbines and Jet Engines
Inter-cooling in multistage compressors is done

To cool the air during compression
To enable compression in two stages
To minimize the work of compression
To cool the air at delivery

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Compressors, Gas Turbines and Jet Engines
More than one stage will be preferred for reciprocating compressor if the delivery pressure is more than

10 kg/cm²
2 kg/cm²
6 kg/cm²
14.7 kg/cm²

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Compressors, Gas Turbines and Jet Engines
Work ratio of a gas turbine may be improved by

Both (A) and (C) above
Decreasing the compression work
Increasing the turbine work
Increasing the compression work

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Compressors, Gas Turbines and Jet Engines
A jet engine works on the principle of conservation of

Flow
Mass
Linear momentum
Energy

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