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Compressors, Gas Turbines and Jet Engines

Compressors, Gas Turbines and Jet Engines
The criterion of the thermodynamic efficiency for rotary compressor is

None of the listed here
Polytropic compression
Isothermal compression
Isentropic compression

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Compressors, Gas Turbines and Jet Engines
The ratio of isentropic work to Euler work is known as

Work coefficient
Polytropic reaction
Slip factor
Pressure coefficient

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

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

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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
The air is delivered ________ in one revolution in case of a three lobbed rotor.

Six times
Three times
Four times
Two times

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Compressors, Gas Turbines and Jet Engines
The pressure and temperature conditions of air at the suction of compressor are

Slightly less than atmospheric
Atmospheric
Slightly more than atmospheric
Pressure slightly less than atmospheric and temperature slightly more than atmospheric

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