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Fuels and Combustion

Fuels and Combustion
Coke made in narrower by-product coke ovens (as compared to wider ovens) is

Less reactive
All of these
Smaller in size
Stronger

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Fuels and Combustion
Coking time in beehive coke oven is about

2-3 days
One week
Two weeks
12 hours

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Fuels and Combustion
Temperature of coke oven gas just before entering into saturator (for recovery of NH₃) is about __________ °C.

120
180
65
30

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Fuels and Combustion
Tolerable concentration of toxic carbon monoxide in atmospheric air is about __________ PPm.

50
5000
1000
10000

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Fuels and Combustion
Combustion reaction of fuels is a/an __________ reaction.

Endothermic
Exothermic
Auto catalytic
None of these

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Fuels and Combustion
'Fat' coal means a coal having

Low calorific value
High volatile matter
Low ash content
Non smoking tendency

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