Engineering Thermodynamics
The variables which control the physical properties of a perfect gas are

Volume occupied by the gas
All of these
Pressure exerted by the gas
Temperature of the gas

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

It is impossible to transfer heat from a body at a lower temperature to a higher temperature, without the aid of an external source
All of these
There is a definite amount of mechanical energy, which can be obtained from a given quantity of heat energy
It is impossible to construct an engine working on a cyclic process, whose sole purpose is to convert heat energy into work

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Engineering Thermodynamics
Select the wrong statement

A Joule cycle consists of two constant volume and two isentropic processes.
An Ericsson cycle consists of two constant pressure and two isothermal processes.
An Otto cycle consists of two constant volume and two isentropic processes.
All of these

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