Mechanical Engineering - Thermodynamics - Discussion

Discussion Forum : Thermodynamics - Section 3 (Q.No. 24)

Thermodynamics

24.

The condition for the reversibility of a cycle is

the pressure and temperature of the working substance must not differ, appreciably, from those of the surroundings at any stage in the process

all the processes, taking place in the cycle of operation, must be extremely slow

the working parts of the engine must be friction free

all of the above

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