Chemical Engineering - Fuels and Combustion

11. 

Coke compared to the coal from which it has been made, contains

A. less volatile matter.
B. more carbon.
C. greater percentage of ash.
D. all (a), (b) and (c).

Answer: Option D

Explanation:

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12. 

A gaseous fuel in order to develop luminousity on burning, must contain

A. carbon monoxide
B. hydrocarbons
C. hydrogen
D. oxygen

Answer: Option B

Explanation:

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13. 

Nitrogen present in the flue gas is determined in the orsat apparatus by absorbing it in

A. KOH
B. ammoniacal cuprous chloride
C. pyrogallol solution
D. none of these

Answer: Option D

Explanation:

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14. 

The lowest temperature, at which a solid fuel produces enough vapors to support continuous combustion, is called

A. fire point
B. smoke point
C. burning temperature
D. kindling temperature

Answer: Option C

Explanation:

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15. 

A coal having high volatile matter content will

A. give less yield of tar and gas on carbonisation.
B. burn with a small non-smoky flame.
C. have a very high calorific value.
D. none of these.

Answer: Option D

Explanation:

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