Compressors, Gas Turbines and Jet Engines
The work ratio of a gas turbine plant is defined as the ratio of

Net work output and work done by turbine
Net work output and heat supplied
Net work output and isentropic heat drop
Actual heat drop and isentropic heat drop

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

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

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