Chemical Engineering - Fuels and Combustion

36. 

Cannel coal and boghead coal are the examples of

A. humic coals
B. liptobiolites
C. sapropelic coals
D. none of these

Answer: Option C

Explanation:

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37. 

Which of the following combustibles is absent in blast furnace gas ?

A. H2
B. CH4
C. CO
D. none of these

Answer: Option B

Explanation:

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38. 

The calorific value of producer gas is around __________ kcal/Nm3

A. 1300
B. 500
C. 4500
D. 9000

Answer: Option A

Explanation:

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39. 

About __________ Nm3 of air will be required for the complete combustion of 2Nm3 of CO.

A. 2
B. 3
C. 5
D. 1

Answer: Option C

Explanation:

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40. 

Coking time in beehive coke oven is about

A. 12 hours
B. 2-3 days
C. one week
D. two weeks

Answer: Option B

Explanation:

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