Compressors, Gas Turbines and Jet Engines
For an irreversible gas turbine cycle, the efficiency and work ratio both depend on

Pressure ratio alone
Minimum cycle temperature alone
Maximum cycle temperature alone
Both pressure ratio and maximum cycle temperature

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Compressors, Gas Turbines and Jet Engines
Which of the following statement is correct as regard to centrifugal compressors?

The flow of air is parallel to the axis of the compressor
The impeller rotates at high speeds
The static pressure of air in the impeller increases in order to provide centripetal force on the air
The maximum efficiency is higher than multistage axial flow compressors

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