Mechanical Engineering - Thermodynamics

6. 

An adiabatic process is one in which

A. no heat enters or leaves the gas
B. the temperature of the gas changes
C. the change in internal energy is equal to the mechanical workdone
D. all of the above

Answer: Option D

Explanation:

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7. 

Water gas is obtained by passing air and a large amount of steam over waste coal at about 650°C.

A. Correct
B. Incorrect

Answer: Option B

Explanation:

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8. 

Which of the following represents Otto cycle on temperature - entropy (T - s) diagram?

A.
B.
C.
D.

Answer: Option C

Explanation:

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9. 

When the gas is heated at constant volume, the heat supplied increases the internal energy of the gas.

A. True
B. False

Answer: Option A

Explanation:

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10. 

Which of the following is the lightest and most volatile liquid fuel?

A. Gasoline
B. Kerosene
C. Fuel oil

Answer: Option A

Explanation:

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