Engineering Thermodynamics
Stirling cycle consists of

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

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Engineering Thermodynamics
Select the wrong statement

An Otto cycle consists of two constant volume and two isentropic processes.
All of these
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 condition for the reversibility of a cycle is

All of these
The pressure and temperature of the working substance must not differ, appreciably, from those of the surroundings at any stage in the process
The working parts of the engine must be friction free
All the processes, taking place in the cycle of operation, must be extremely slow

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