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Fuels and Combustion

Fuels and Combustion
Ash content in the coke produced from a coking coal having 20% ash may be around __________ percent.

24
12
6
18

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Fuels and Combustion
To avoid fire by spontaneous combustion of coal due to its low temperature oxidation, it should be stored in

Fine sizes without the presence of any lump
Large heaps with small surface to volume ratio
Shallow and small piles
Closed space without any ventilation facility

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Fuels and Combustion
Calorific value of coke even gas produced by low temperature carbonisation of coal is about __________ Kcal/Nm³.

4000
10000
2500
6500

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Fuels and Combustion
Calorific values of both the solid as well as the liquid fuels can be determined by __________ calorimeter.

Boy's
Bomb
Junkar's
None of these

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Fuels and Combustion
Hard pitch is used for making

Plastics
Insecticides
Pulverised fuel
Perfumes

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Fuels and Combustion
Blast furnace gas constitutes mainly of

CH₄ & CO₂
N₂ & H₂
N₂ & CH₄
N₂ & CO

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