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 impeller rotates at high speeds
The static pressure of air in the impeller increases in order to provide centripetal force on the air
The flow of air is parallel to the axis of the compressor

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Compressors, Gas Turbines and Jet Engines
In the cross compounding of the gas turbine plant

H.P. compressor is connected to L.P. turbine and L.P. compressor is connected to H.P. turbine
All are connected in series
Both the arrangements can be employed
H.P. compressor is connected to H.P. turbine and L.P. compressor to L.P. turbine

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