Compressors, Gas Turbines and Jet Engines
The specific output per kg mass flow rate of a gas turbine (having fixed efficiencies of compressor and turbine and fixed higher and lower temperature) with increase in pressure ratio will

Decrease continuously
First increase, reach maximum and then decrease
Increase first at fast rate and then slow
Increase first at slow rate and then fast

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Compressors, Gas Turbines and Jet Engines
Inter-cooling in gas turbine results in

Increase in both thermal efficiency and net output
Increase in net output but decrease in thermal efficiency
Increase in thermal efficiency but decrease in net output
Decrease in both thermal efficiency and net output

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