If heat Q flows reversibly from the system to the surroundings at To, what will be the effect on entropy?

Mechanical Engineering : Engineering Thermodynamics - Quiz(MCQ)

entropy of the system is reduced by Q/To

system has lost entropy to the surroundings

entropy increase of the surroundings is Q/To

All of the above

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

Explanation : We can say that there is entropy transfer from the system to the surroundings along with heat flow.

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

Mechanical Engineering MCQ's

Theory of Machines

Engineering Mechanics

Machine Design

Strength of Materials

Engineering Materials

Automobile Engineering

Steam Boilers and Engines