Thermodynamics MCQ with Answers

246) When wood is heated with a limited supply of air to a temperature not less than 280 Degree Centigrade, the resulting fuel is

Answer is:

wood charcoal

247) The efficiency of Diesel cycle increases with increase in cut-off.

Answer is:

No

Explanation:

The efficiency of Diesel cycle increases with decrease in cut-off.

Cutoff ratio is the ratio of the cylinder volumes after and before the combustion process. As the cutoff ratio decreases, the efficiency of the diesel cycle increases.

The efficiency of Diesel cycle increases with increase in cut-off.

248) The property of a working substance which increases or decreases as the heat is supplied or removed in a reversible manner, is known as

Answer is:

entropy

249) It is __________ to make an engine working on a Carnot cycle.

Answer is:

impossible

250) The heating of a gas at constant pressure is governed by

Answer is:

246) When wood is heated with a limited supply of air to a temperature not less than 280 Degree Centigrade, the resulting fuel is

wood charcoal

247) The efficiency of Diesel cycle increases with increase in cut-off.

No

248) The property of a working substance which increases or decreases as the heat is supplied or removed in a reversible manner, is known as

entropy

249) It is __________ to make an engine working on a Carnot cycle.

impossible

250) The heating of a gas at constant pressure is governed by

Charles' law