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Thermodynamics - Engineering

Q1:

The condition for the reversibility of a cycle is

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

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

C the working parts of the engine must be friction free

D all of the above

ANS:D - all of the above

Explanation: No answer description is available.