Mechanical Engineering - Thermodynamics

1. 

Which of the following gas has the highest calorific value?

A. Coal gas
B. Producer gas
C. Mond gas
D. Blast furnace gas

Answer: Option A

Explanation:

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2. 

The oxygen atom is __________ times heavier than the hydrogen atom.

A. 2
B. 4
C. 8
D. 16

Answer: Option D

Explanation:

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3. 

When the gas is cooled at constant pressure,

A. its temperature increases but volume decreases
B. its volume increases but temperature decreases
C. both temperature and volume increases
D. both temperature and volume decreases

Answer: Option D

Explanation:

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4. 

The work ratio of a gas turbine plant is given by

A.
B.
C.
D.

Answer: Option A

Explanation:

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5. 

As per Charles' law, the volume of a given mass of a perfect gas varies __________ as its absolute temperature, when the absolute pressure remains constant.

A. directly
B. indirectly

Answer: Option A

Explanation:

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