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Fuels and Combustion

Fuels and Combustion
Volatile matter content of metallurgical coke may be around __________ percent.

30-33
1-2
10-15
22-26

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Fuels and Combustion
Stack heat losses can be minimised by

Maintaining proper draft in the furnace
Controlling the excess air
Oxygen enrichment of combustion air
Using low c.v. fuels

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Fuels and Combustion
Purity of coke means that, it is high in carbon and low in

Iron
Ash
Moisture
Volatiles

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Fuels and Combustion
For every 10% increase in the excess air; the fuel consumption increases by __________ percent.

5
10
2
0.1

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Fuels and Combustion
Very __________ coals are completely devoid of cokability i.e, it is non coking.

Neither A nor B
Both A & B
Mature
Young

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Fuels and Combustion
Naphthalene is used for making

Drug intermediates e.g. β-naphthol
All of these
Insecticides (e.g. moth balls)
Unsaturated polyesters

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