Compressors, Gas Turbines and Jet Engines
In a compressor, free air delivered is the actual volume delivered at the stated pressure reduced to

0°C and 1 kg/cm²
Intake temperature and pressure conditions
20°C and 1 kg/cm²
N.T.P. conditions

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Compressors, Gas Turbines and Jet Engines
In a turbo jet engine, subsequent to heat addition to compressed air, to get the power output, the working substance is expanded in

Turbine blades, which is essentially an isentropic process
Exit nozzle, which is essentially an isentropic process
Turbine blades, which is a constant volume process
Exit nozzle, which is a constant volume process

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Compressors, Gas Turbines and Jet Engines
Intercooling in gas turbines

Increases net output but decreases thermal efficiency
Decreases net output and thermal efficiency both
Increases net output and thermal efficiency both
Decreases net output but increases thermal efficiency

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