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Chemical Engineering - Fuels and Combustion

Exercise : Fuels and Combustion - Section 6
46.
Naphthalene is used for making
insecticides (e.g. moth balls).
unsaturated polyesters.
drug intermediates e.g. β-naphthol.
all (a), (b) and (c).
Answer: Option
Explanation:
No answer description is available. Let's discuss.
47.
The advantage of firing pulverised coal in the furnace lies in the fact, that it
permits the use of high ash content coal.
permits the use of low fusion point ash coal.
accelerates the burning rate and economises on fuel combustion.
all (a), (b) and (c).
Answer: Option
Explanation:
No answer description is available. Let's discuss.
48.
A coal having higher volatile matter content, has lower
smoking tendency on burning.
coke oven gas yield on carbonisation.
chance of catching fire during storage in open space.
ignition temperature.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
49.
Weathering of coal during storage causes
reduction in coal size.
increase in its friability.
decrease in its caking capacity.
all (a), (b) and (c).
Answer: Option
Explanation:
No answer description is available. Let's discuss.
50.
With increase in the temperature of carbonisation of coal
hydrogen content of coke oven gas increases due to cracking of hydrocarbons.
methane content in the coke oven gas decreases and carbon monoxide content increases.
calorific value of the coke oven gas decreases due to cracking of hydrocarbons which is not compensated by increase in CO & H2 content.
all (a), (b) and (c)
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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