Compressors, Gas Turbines and Jet Engines
In a jet propulsion

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

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Compressors, Gas Turbines and Jet Engines
The assumption made in two stage compression with inter-cooler is that

All of the listed here
There is no pressure drop in the inter-cooler
The compression in both the cylinders is polytropic
The suction and delivery of air takes place at constant pressure

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