Chemical Engineering - Fuels and Combustion

11. 

Power alcohol as compared to straight run gasoline has lower

A. calorific value
B. octane number
C. specific gravity
D. viscosity

Answer: Option A

Explanation:

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12. 

When the coal is heated in absence of air, it is called its

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

Answer: Option D

Explanation:

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13. 

C.V. (kcal/Nm3) of gaseous fuels __________ with increase in molecular weight.

A. decreases
B. increases
C. remains constant
D. may increase or decrease, depends on combustibles.

Answer: Option D

Explanation:

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14. 

Shatter index of the coke is a measure of its

A. strength
B. bulk density
C. reactivity
D. none of these

Answer: Option A

Explanation:

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15. 

Narrow coke ovens as compared to wider coke ovens

A. produce smaller coke.
B. produce stronger coke.
C. require less time of carbonisation.
D. all (a), (b) and (c).

Answer: Option D

Explanation:

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