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

First increase, reach maximum and then decrease
Decrease continuously
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
In air compressors, free air delivery means the

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

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