Mechanical Engineering Objective Questions { Thermodynamics }

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568. When a gas is heated, change takes place in

D. all of these

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569. Which of the following is an intensive property of a thermodynamic system?

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570. A triatomic molecule consists of __________ atoms.

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571. The main cause for the irreversibility is

A. mechanical and fluid friction

B. unrestricted expansion

C. heat transfer with a finite temperature difference

D. all of the above

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572. A cycle consisting of __________ and two isothermal processes is known as Stirling cycle.

A. two constant pressure

B. two constant volume

C. two isentropic

D. one constant pressure, one constant volume

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573. The heat and mechanical energies are mutually convertible. This statement was established by

D. none of these

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574. Mond gas is obtained by

A. partial combusion of coal, coke, anthracite coal or charcoal in a mixed air steam blast

B. carbonisation of bituminous coal

C. passing steam over incandescent coke

D. passing air and a large amount of steam over waste coal at about 650°C

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