Thermodynamics - Mechanical Engineering Questions and Answers

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The entropy may be expressed as a function of

pressure and temperature

temperature and volume

heat and work

all of these

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It is __________ to construct an engine working on a cyclic process, whose sole purpose is to convert heat energy into work.

possible

impossible

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Which of the following is the correct statement?

All the reversible engines have the same efficiency.

All the reversible and irreversible engines have the same efficiency.

Irreversible engines have maximum efficiency.

All engines are designed as reversible in order to obtain maximum efficiency.

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A close cycle gas turbine gives __________ efficiency as compared to an open cycle gas turbine.

same

lower

higher