Engineering Thermodynamics
A process, in which the gas is heated or expanded in such a way that the product of its pressure and volume remains constant, is called

Adiabatic process
Hyperbolic process
Isothermal process
Polytropic process

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Engineering Thermodynamics
Carnot cycle consists of

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

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