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Fuels and Combustion

Fuels and Combustion
Heat penetration rate in narrow coke ovens in high temperature carbonisation of coal is around __________ cm/hr.

0.5
10
2.5
20

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Fuels and Combustion
Laboratory gas is obtained by the cracking of

Diesel
Gasoline
Fuel oil
Kerosene

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Fuels and Combustion
Abrasion index of blast furnace coke should be around __________ percent.

35
20
55
80

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Fuels and Combustion
Pure carbon is completely burnt in oxygen. The flue gas analysis is 70%CO₂, 20%CO and 10%O₂. The percent excess oxygen used is

10
20
0
12.5

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Fuels and Combustion
Removal of hydrogen from coke oven gas

Is not possible on commerical scale
Does not alter its calorific value
Decreases its calorific value
Increases its calorific value

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Fuels and Combustion
Out of the following fuels, the difference between the net and gross calorific value is maximum in case of

Blast furnace gas
Bituminous coal
Fuel oil
Pitch

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