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

Isothermal process
Adiabatic process
Polytropic process
Hyperbolic process

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Engineering Thermodynamics
Which of the following statement is correct according to Clausis statement of second law of thermodynamics?

It is possible to transfer heat from a body at a lower temperature to a body at a higher temperature by using refrigeration cycle.
It is impossible to transfer heat from a body at a lower temperature to a body at a higher temperature, without the aid of an external source.
None of these
It is possible to transfer heat from a body at a lower temperature to a body at a higher temperature.

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Engineering Thermodynamics
The thermodynamic difference between a Rankine cycle working with saturated steam and the Carnot cycle is that

A Rankine cycle receives heat at two places
Heat is supplied to water at temperature below the maximum temperature of the cycle
Carnot cycle can't work with saturated steam
Rankine cycle is hypothetical

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