Chemical Engineering - Fuels and Combustion

16. 

Most of the coking coals are

A. anthracite
B. bituminous
C. lignite
D. none of these

Answer: Option B

Explanation:

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17. 

Gobar gas constitutes mainly of

A. CH4 & CO2
B. CO & CO2
C. CH4 & N2
D. CO & N2

Answer: Option A

Explanation:

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18. 

High ash containing coke

A. produces more slag when used in the blast furnace.
B. has poor strength and abrasion resistance.
C. is desirable in producer gas manufacture.
D. none of these.

Answer: Option A

Explanation:

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19. 

Stoichiometric combustion of 12 kg of carbon requires __________ of oxygen.

A. 1kg mole
B. 22.4 Nm3
C. 32 kg
D. all (a), (b) and (c)

Answer: Option D

Explanation:

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20. 

Coal is pulverised before burning in large capacity boiler furnaces mainly to

A. ensure its complete combustion.
B. facilitate easy ash removal.
C. enhance its calorific value.
D. provide trouble free operation.

Answer: Option A

Explanation:

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