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Fuels and Combustion

Fuels and Combustion
Purity of coke means that, it is high in carbon and low in

Volatiles
Iron
Ash
Moisture

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Fuels and Combustion
Combustion reaction of fuels is a/an __________ reaction.

Auto catalytic
None of these
Endothermic
Exothermic

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Fuels and Combustion
Hardgrove grindability index of four coal samples are given below. Which of them is the easiest to grind?

85
50
70
100

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

CO
H₂
C₂H₂
C₂H₆

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Fuels and Combustion
The advantage of firing pulverised coal in the furnace lies in the fact, that it

Permits the use of high ash content coal
Accelerates the burning rate and economises on fuel combustion
Permits the use of low fusion point ash coal
All of these

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Fuels and Combustion
Blast furnace gas constitutes mainly of

N₂ & CH₄
CH₄ & CO₂
N₂ & CO
N₂ & H₂

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