Chemical Engineering - Fuels and Combustion

6. 

When steam is passed over coal resulting in the endothermic reaction represent by, C + H2O = CO + H2, it is called the __________ of coal.

A. carbonisation
B. oxidation
C. coalification
D. gasification

Answer: Option D

Explanation:

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7. 

Dry air requirement for burning 1 Nm3 of CO to CO2 may be around __________ Nm3.

A. 2.4
B. 1.75
C. 0.87
D. 11.4

Answer: Option A

Explanation:

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8. 

Degree of carbonisation of coal during coke making can be roughly judged by the __________ of the coke produced.

A. colour
B. moisture content
C. ash content
D. volatile matter

Answer: Option D

Explanation:

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9. 

Ammonia content in raw coke oven gas is about __________ gm/Nm3.

A. 1
B. 15
C. 50
D. 100

Answer: Option B

Explanation:

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10. 

Coal is heated in absence of air for 7 minutes at a temperature of about __________ °C, during its volatile matter determination for proximate analysis.

A. 550
B. 750
C. 950
D. 1150

Answer: Option C

Explanation:

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