Chemical Engineering - Fuels and Combustion

6. 

Which of the following petrological constitutes is responsible for bright and lustrous black band of bituminous coal ?

A. Vitrain
B. Clarain
C. Durain
D. Fussain

Answer: Option A

Explanation:

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7. 

Which of the following is not a by-product fuel?

A. Sewage gas
B. Refinery gas
C. Producer gas
D. Bagasse

Answer: Option C

Explanation:

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8. 

White flue gas (resembling steam) coming out of the chimney of a thermal power plant indicates that the fuel used in the boiler furnace is

A. tar
B. coke oven gas
C. pitch
D. pulverised coke

Answer: Option B

Explanation:

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9. 

Too much of excess air in combustion results in high

A. fuel consumption for the same heat load.
B. stack gas temperature.
C. percentage of oxygen in flue gases.
D. all (a), (b) and (c).

Answer: Option D

Explanation:

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10. 

A fuel with high heat release rate will

A. require smaller combustion chamber.
B. have high calorific value.
C. have high adiabatic flame temperature.
D. none of these.

Answer: Option A

Explanation:

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