Engineering Thermodynamics
Compressed air coming out from a punctured football

Becomes cooler
May become hotter or cooler depending upon the humidity of the surrounding air
Remains at the same temperature
Becomes hotter

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Engineering Thermodynamics
Which is the incorrect statement about Carnot cycle?

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

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