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Fuels and Combustion

Fuels and Combustion
Assam coals suffers mainly from the disadvantage of high __________ content.

Moisture
Sulphur (4-6%)
Ash
Volatile matter

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Fuels and Combustion
Fuel combustion is never cent per cent efficient due to

Incomplete combustion
Dry gas/stack gas loss
All of these
Moisture loss

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Fuels and Combustion
Naphthalene is removed from coke oven gas by

Adsorbing on bog iron bed
Scrubbing with wash oil (a petroleum product)
Absorbing in vetro-coke solution
None of these

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Fuels and Combustion
Furnace oil consumption in a furnace for a given duty employing preheated combination air (at 300° ) may be reduced by about __________ percent as compared to the use of atmospheric combustion air.

10
35
20
5

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Fuels and Combustion
Calorific value of a typical dry anthracite coal may be around __________ Kcal/kg.

4000
15000
8000
1000

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Fuels and Combustion
A coal having higher volatile matter content, has lower

Coke oven gas yield on carbonisation
Smoking tendency on burning
Chance of catching fire during storage in open space
Ignition temperature

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