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Fuels and Combustion

Fuels and Combustion
Incomplete combustion of a fuel is characterised by the high __________ in the flue gas.

Oxygen
Smoke
Temperature
Carbon monoxide

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Fuels and Combustion
Coke compared to the coal from which it has been made, contains

More carbon
All of these
Greater percentage of ash
Less volatile matter

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Fuels and Combustion
Washing of coal is done to reduce the

Inherent impurities
Mineral matter
Adhering impurities
Both B and C

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Fuels and Combustion
Low temperature oxidation of coal during storage does not decrease its

Caking power
None of these
Oxygen content
Calorific value

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Fuels and Combustion
Air/gas ratio for complete combustion will be the highest for

Gobar gas
Coke oven gas
Carburetted water gas
LPG

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Fuels and Combustion
With increase in the oxygen content of the coal, its __________ decreases.

Neither A nor B
Both A & B
Calorific value
Caking power

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