Fuels and Combustion
Emission of dense white smoke out of the chimney of a thermal power plant is an indication of the use of

Too much air for combustion
Pulverised coal in boilers
Correct amount of air for combustion
Less air for combustion

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Fuels and Combustion
Combustion of pulverised fuel

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

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