Engineering Thermodynamics
Addition of heat at constant pressure to a gas results in

Raising its temperature
Raising its pressure
Raising its volume
Raising its temperature and doing external work

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Engineering Thermodynamics
Select the wrong statement

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

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Engineering Thermodynamics
The door of a running refrigerator inside a room was left open. Which of the following statements is correct?

The room will be cooled very slightly
The room will be cooled to the temperature inside the refrigerator
The room will be gradually warmed up
The temperature of the air in room will remain unaffected

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

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

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