Fuels and Combustion
Compound coke ovens are those which can be heated by

Both B and C
Both steam and electrical power
Rich gas (e.g., coke oven gas)
Lean gas (e.g., B.F. gas)

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Fuels and Combustion
Combustion of pulverised fuel

Suppresses the discharge of fine dust and grit into atmosphere
Requires larger combustion chamber than rich gaseous fuel
All of these
In a metallurgical furnace does not contaminate the product in the furnace by ash from fuel

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Fuels and Combustion
Fixed carbon in coal is defined as

The one which is present in the residue after combustion
The total quantity of carbon present in the coal
That present in volatile matters
Hundred minus the percentage of volatile matter, ash and moisture

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