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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
Caking index of coal blend used for blast furnace coke making is about

8
36
22
12

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Fuels and Combustion
With increases in carbonisation temperature

Methane percentage in the coke oven gas increases
Hydrogen percentage in the coke oven gas decreases
Tar yield increases
Coke even gas yield increases

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Fuels and Combustion
Which of the following is not a by-product fuel?

Refinery gas
Petrol
Pitch
Blast furnace gas

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Fuels and Combustion
High sulphur content in a fuel __________ of the flue gases.

Increases the dew point
Decreases the dew point
Reduces the combustion efficiency by limiting the permissible temperature reduction
Both B & C

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Fuels and Combustion
Flue gas from the heating chamber of byproduct coke ovens is removed by

Forced draft fan
Induced draft fan
Natural draft
Steam ejector

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