The condition for the reversibility of a cycle is - Engineering Thermodynamics Quiz

Mechanical Engineering : Engineering Thermodynamics - Quiz(MCQ)

The condition for the reversibility of a cycle is

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

All of the above

Correct Answer : Option (D) : All of the above

Recently Updated in Engineering Thermodynamics Questions

When work is dissipated into internal energy, what is the change in the disorderly motion of molecules.

increases

decreases

remains the same

None of the above

Correct Answer : increases

Explanation : We know that increase in internal energy causes more random motion.

The entropy change of a system between two identifiable equilibrium state is ___ when the intervening process is reversible or change of state is irreversible.

same

different

depends on the process

None of the above

Correct Answer : same

Which of the following is an example of low grade energy?

heat or thermal energy

heat from combustion of fossil fuel

heat from nuclear fission or fusion

All of the above

Correct Answer : All of the above

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