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Fuels and Combustion

Fuels and Combustion
Coking time in narrow by-product coke ovens is around __________ hours.

18
8
48
80

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Fuels and Combustion
Main constituents of purified Lurgi gas are

CO₂, O₂ & CO
N₂, H₂ & CO₂
CO, H₂ & CH₄
H₂, CmHn & CO₂

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Fuels and Combustion
Which is the most matured coal?

Bituminous
Lignite
Anthracite
Semi-anthracite

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Fuels and Combustion
A good metallurgical coke should have very low

Hardness & strength
Porosity
Fusion point of its ash
Sulphur & phosphorous content

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Fuels and Combustion
Bomb calorimeter can be used to determine the __________ of the coal.

Calorific value
Neither A nor B
Sulphur content
Both A & B

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Fuels and Combustion
Flue gas obtained on complete combustion of pure acetylene (a hydrocarbon fuel) will contain

CO
H₂O
Both B & C
CO₂

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