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Fuels and Combustion

Fuels and Combustion
Which of the following is called "blue gas"?

Coke oven gas
Producer gas
Natural gas
Water gas

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Fuels and Combustion
Most of the coking coals are

None of these
Bituminous
Lignite
Anthracite

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Fuels and Combustion
Gross calorific value will be equal to the net calorific value for

C₂H₆
CO
C₂H₂
H₂

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Fuels and Combustion
Largest constituent of coke oven gas is

H₂
N₂
CH₄
CO₂

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Fuels and Combustion
High rate of heating of coke ovens

Increases the time of carbonisation
Produces larger size coke
May damage its walls due to abrupt excessive swelling of coal
None of these

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Fuels and Combustion
Hard coke is manufactured from

Lignite
Semi-anthracite
Anthracite
Bituminous coal

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