Engineering Thermodynamics
A heat exchange process in which the product of pressure and volume remains constant is known as

Isentropic process
Throttling process
Heat exchange process
Hyperbolic process

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Engineering Thermodynamics
Stirling cycle consists of

Two constant pressure and two isothermal processes
Two constant volume and two isentropic processes
Two constant volume and two isothermal processes
One constant volume, one constant pressure and two isentropic processes

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