Coke is produced - Engineering Thermodynamics Quiz

Mechanical Engineering : Engineering Thermodynamics - Quiz(MCQ)

Coke is produced

when coal is first dried and then crushed to a fine powder by pulverising machine

by heating wood with a limited supply of air to a temperature not less than 280Â°C

from the finely ground coal by moulding under pressure with or without a binding material

when coal is strongly heated continuously for 42 to 48 hours in the absence of air in a closed vessel

Correct Answer : Option (D) : when coal is strongly heated continuously for 42 to 48 hours in the absence of air in a closed vessel

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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