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Fuels and Combustion

Fuels and Combustion
Laboratory gas is obtained by the cracking of

Fuel oil
Gasoline
Kerosene
Diesel

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Fuels and Combustion
Traces of tar fog present in the coke oven gas is removed by

Cyclone separator
Wet packed scrubber
Washing with monoethanolamine
Electrostatic precipitator

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Fuels and Combustion
Too much of excess air in combustion results in high

All of these
Fuel consumption for the same heat load
Percentage of oxygen in flue gases
Stack gas temperature

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

36
22
8
12

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Fuels and Combustion
Mineral matter content (M) and ash content (A) in coal are approximately related as

M = 1.1A
M = 1.5A
M = 2A
M = A

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Fuels and Combustion
Caking coal is desirable for

All of these
Coke making
Burning on travelling grate
Burning on firebars

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