Chemical Engineering - Fuels and Combustion

26. 

Which of the following is a primary fuel ?

A. Blast furnace coke
B. Gasoline
C. Natural gas
D. Wood charcoal

Answer: Option C

Explanation:

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27. 

Combustion of pulverised coal compared to the lumpy coal

A. provides better control of furnace temperature.
B. facilitates combustion with lower excess air.
C. provides higher thermal efficiency & flame temperature.
D. all (a), (b) & (c).

Answer: Option D

Explanation:

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28. 

The ratio of % total carbon obtained in the ultimate analysis of coke and % fixed carbon obtained in the proximate analysis is always

A. 1
B. < 1
C. > 1
D. unpredictable

Answer: Option C

Explanation:

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29. 

A coal with high __________ content, would ignite most easily.

A. fixed carbon
B. volatile matter
C. ash
D. oxygen

Answer: Option B

Explanation:

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30. 

KOH solution used in orsat apparatus absorbs

A. CO2
B. SO2
C. both (a) & (b)
D. neither (a) nor (b)

Answer: Option C

Explanation:

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