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Fuels and Combustion

Fuels and Combustion
Caking index of the coal blend used for the manufacture of metallurgical coke should be around

40
21
48
5

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Fuels and Combustion
Naphthalene recovered from coke oven gas is used

As a fuel in furnaces
As moisture proof coating on fibres
As moth balls (insecticides)
For making electrodes

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Fuels and Combustion
The calorific value of producer gas is around __________ kcal/Nm³

4500
1300
9000
500

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Fuels and Combustion
Improper storage condition results in the weathering of coal and spontaneous combustion, which increases its

Calorific value
Friability & oxygen content
Caking index
Yield of carbonised products

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Fuels and Combustion
In Orsat's apparatus, ammoniacal cuprous chloride is used for selectivity absorbing

H₂O
CO
CO₂
O₂

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Fuels and Combustion
Coal is pulverised before burning in large capacity boiler furnaces mainly to

Provide trouble free operation
Enhance its calorific value
Facilitate easy ash removal
Ensure its complete combustion

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