Chemical Engineering - Fuels and Combustion

11. 

Junker's calorimeter is used to determine the calorific value of

A. pulverised coal
B. gaseous fuels
C. fuel oil
D. none of these

Answer: Option B

Explanation:

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12. 

Combustion reaction of fuels is a/an __________ reaction.

A. auto catalytic
B. exothermic
C. endothermic
D. none of these

Answer: Option B

Explanation:

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13. 

Improper storage condition results in the weathering of coal and spontaneous combustion, which increases its

A. caking index.
B. yield of carbonised products.
C. friability & oxygen content.
D. calorific value.

Answer: Option C

Explanation:

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14. 

Which of the following constituents of coal is the most important in the production of coke?

A. Moisture
B. Ash
C. Volatiles
D. Carbon

Answer: Option D

Explanation:

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15. 

High temperature in gasification of coal favours

A. high production of CO2.
B. low production of CO2.
C. high production of CO.
D. both (b) and (c).

Answer: Option D

Explanation:

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