Black smoke coming out of the chimney of a furnace is an indication of the use of __________ in the furnace. Options: A . &nbspLow amount of excess combustion air B . &nbspLarge quantity of excess combustion air C . &nbspHydrocarbon fuel D . &nbspPulverised coal as fuel

Black smoke coming out of the chimney of a furnace is an indication of the use o

Question

Black smoke coming out of the chimney of a furnace is an indication of the use of __________ in the furnace.

Options:

A . Low amount of excess combustion air

B . Large quantity of excess combustion air

C . Hydrocarbon fuel

D . Pulverised coal as fuel

Answer: Option A

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