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Fuels and Combustion

Fuels and Combustion
Yield of coke oven gas in low temperature carbonisation of coal is about __________ Nm³ /ton of dry coal.

160
500
750
60

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Fuels and Combustion
Low temperature carbonisation of coal produces

Very low calorific value coke oven gas
Soft coke
No by-products
Metallurgical coke

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Fuels and Combustion
'Wind loss' resulting from unscientific storage of coal may be the order of about __________ percent.

10.5
14.5
2.5
7.5

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Fuels and Combustion
In general, the limit of inflammability/explosion limit of fuel gases is widened by the

Use of pure oxygen for combustion instead of air
All of these
Increase in gas pressure
Increase in temperature (i.e. preheating)

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Fuels and Combustion
Low temperature oxidation of coal is accelerated by the

Storage in compressed piles
Storage in large heaps
All of these
Absence of porous or friable particles

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Fuels and Combustion
A fuel containing carbon and carbon monoxide (but containing no hydrogen or its compounds) is burnt in pure oxygen at constant pressure. Its gross calorific value as compared to net calorific value will be

Data insufficient; can't be predicted
Same
Less
More

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