Engineering Thermodynamics
A perpetual motion machine is

A hypothetical machine
A non-thermodynamic machine
A hypothetical machine whose operation would violate the laws of thermodynamics
A thermodynamic machine

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Engineering Thermodynamics
Which is the incorrect statement about Carnot cycle?

It provides concept of maximising work output between the two temperature limits
It is used as the alternate standard of comparison of all heat engines
All the heat engines are based on Carnot cycle
All of these

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