Engineering Thermodynamics
Which of the following is the correct statement?

All the reversible engines have the same efficiency.
Irreversible engines have maximum efficiency.
All the reversible and irreversible engines have the same efficiency.
All engines are designed as reversible in order to obtain maximum efficiency.

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Engineering Thermodynamics
Which is the incorrect statement about Carnot cycle?

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
It provides concept of maximising work output between the two temperature limits

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