Chemical Engineering - Fuels and Combustion

6. 

Which of the following is not used as a binder in coal briquetting ?

A. Tar
B. Molasses
C. Pitch
D. Line

Answer: Option D

Explanation:

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7. 

Size of blast furnace grade coke is __________ mm.

A. 25-80
B. 0-15
C. 15-25
D. >100

Answer: Option A

Explanation:

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8. 

Presence of __________ in a dry gaseous fuel does not contribute to its calorific value.

A. sulphur
B. oxygen
C. hydrogen
D. carbon

Answer: Option B

Explanation:

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9. 

The internal energy of the combustion products is __________ compared to that of reactants.

A. more
B. less
C. equal
D. more or less ; (depends on the state of fuel.)

Answer: Option B

Explanation:

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10. 

Which of the following is not a product of tar distillation ?

A. Phenol & naphthalene
B. Benzol & pitch
C. Anthracene & creosote
D. None of these

Answer: Option D

Explanation:

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