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Fuels and Combustion

Fuels and Combustion
Blast furnace gas is a very poisonous gas because of its predominantly high __________ content.

CH₄
CO
H₂O
CO₂

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Fuels and Combustion
Percentage of nitrogen in blast furnace gas may be around

55
25
80
5

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Fuels and Combustion
Soft coke is not

A domestic fuel
None of these
Used in blast furnaces
Produced by low temperature carbonisation of coal

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Fuels and Combustion
Dust content in raw blast furnace gas is about __________ gm/Nm³ , hence it is cleaned to the dust level of about < 10 mg /Nm³ before use.

43832
70-100
15-30
150-200

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

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

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Fuels and Combustion
Which of the following gaseous fuels is likely to have the highest gross calorific value?

Producer gas
Natural gas
LPG
Sewage gas

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