Compressors, Gas Turbines and Jet Engines
In a jet propulsion

None of these
The propulsive matter is ejected from within the propelled body
The propulsive matter is caused to flow around the propelled body
Its functioning does not depend upon presence of air

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

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

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