Chemical Engineering - Fuels and Combustion

1. 

Calorific value of coke oven gas is around __________ Kcal/Nm3.

A. 900
B. 4200
C. 7500
D. 2000

Answer: Option B

Explanation:

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2. 

Highly caking coals

A. produce weak coke.
B. produce strong coke.
C. may damage the coke oven walls during carbonisation.
D. both (b) and (c).

Answer: Option D

Explanation:

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3. 

Main use of hard coke produced by high temperature carbonisation is in the

A. iron blast furnace
B. cupola in foundaries
C. sinter making
D. domestic ovens

Answer: Option A

Explanation:

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4. 

Hard pitch is used for making

A. pulverised fuel
B. perfumes
C. insecticides
D. plastics

Answer: Option A

Explanation:

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5. 

Supply of excess air for complete combustion of fuel is necessitated to facilitate

A. its thorough mixing with air.
B. attainment of chemical equilibrium.
C. attainment of high temperature.
D. none of these.

Answer: Option A

Explanation:

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