Compressors, Gas Turbines and Jet Engines
The overall isothermal efficiency of the compressor is defined as the ratio of

Isentropic power to the power required to drive the compressor
Work required to compress the air isothermally to the actual work required to compress the air for the same pressure ratio
Volume of free air delivery per stroke to the swept volume of the piston
Isothermal power to the shaft power or B.P. of the motor or engine required to drive the compressor

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Compressors, Gas Turbines and Jet Engines
Pick up the false statement

Overall efficiency of gas turbine plant is lower than that of a reciprocating engine
Exhaust losses in gas turbine are high due to large mass flow rate
Gas turbine is a self starting unit
Gas turbine does not require huge quantity of water like steam plant

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