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Fuels and Combustion

Fuels and Combustion
Coke oven gas constitutes mainly of

H₂ & CO
H₂ & CH₄
H₂ & CO₂
CH₄ & CO

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Fuels and Combustion
During combustion of gaseous fuels, deficiency of air

Does not affect the flame length
Tends to shorten the flame
Increases the flame temperature
Lengthens the flame

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Fuels and Combustion
Benzene is used

As a motor fuel
For making insecticides (e.g., DDT, BHC etc.), detergent & rubber (SBR)
As a perfume
As an explosive

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Fuels and Combustion
In high temperature carbonisation (as compared to low temperature carbonisation) of coal

Tar yield is less but free carbon in tar is more
Coke oven gas yield is more
Calorific value of coke oven gas is less
All of these

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Fuels and Combustion
Caking coal is desirable for

Burning on travelling grate
Burning on firebars
All of these
Coke making

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Fuels and Combustion
Yield of charcoal in high temperature carbonisation of wood is about __________ percent.

10
50
25
75

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