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FUELS AND COMBUSTION

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

2000
900
7500
4200

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Fuels and Combustion
Calorific value of of blast furnace gas is around __________ KCal/Nm³.

4200
6500
1800
850

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Fuels and Combustion
Presence of free moisture in coal is most disadvantageous during

Combustion of fire slacks on the grates
Its pulverisation (as it requires more power)
None of these
Handling (e.g. when emptying wagons)

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Fuels and Combustion
Laboratory gas is obtained by the cracking of

Diesel
Kerosene
Fuel oil
Gasoline

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Fuels and Combustion
Coal tar (produced by high temperature carbonisation) is the main source of

Olefins
Paraffins
Alphatic compounds
Aromatic compounds

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