Engineering Thermodynamics
The condition for the reversibility of a cycle is

All of these
The working parts of the engine must be friction free
All the processes, taking place in the cycle of operation, must be extremely slow
The pressure and temperature of the working substance must not differ, appreciably, from those of the surroundings at any stage in the process

ANSWER DOWNLOAD EXAMIANS APP

Engineering Thermodynamics
First law of thermodynamics

All of these
Provides relationship between heat, work and internal energy
Enables to determine change in internal energy of the system
Does not enable to determine change in entropy

ANSWER DOWNLOAD EXAMIANS APP