Compressors, Gas Turbines and Jet Engines
In multistage compressor, the isothermal compression is achieved by

By constantly cooling the cylinder
By running compressor at very slow speed
Employing inter-cooler
By insulating the cylinder

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Compressors, Gas Turbines and Jet Engines
The degree of reaction in an axial flow compressor is defined as the ratio of static enthalpy rise in the

Stator to static enthalpy rise in the rotor
Rotor to static enthalpy rise in the stage
Rotor to static enthalpy rise in the stator
Stator to static enthalpy rise in the stage

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Compressors, Gas Turbines and Jet Engines
The compressor capacity is defined as the

Volume of air sucked by the compressor during its suction stroke
Actual volume of the air delivered by the compressor when reduced to normal temperature and pressure conditions
None of these
Volume of air delivered by the compressor

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Compressors, Gas Turbines and Jet Engines
Choose the correct statement

Gas turbines has flat efficiency at part loads
Gas turbine is capable of rapid start up and loading
Gas turbines have high standby losses and require lot of maintenance
Gas turbine requires lot of cooling water

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