Engineering Thermodynamics
Which is the incorrect statement about Carnot cycle?

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

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Engineering Thermodynamics
According to First law of thermodynamics,

Work-done by a system is equal to the heat transferred by the system
Internal energy, enthalpy and entropy during a process remain constant
Total energy of a system remains constant
Total internal energy of a system during a process remains constant

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