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

N

Nisha Gupta • 2.32K Points
Master

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

(A) Low amount of excess combustion air

(B) Large quantity of excess combustion air

(C) Hydrocarbon fuel

(D) Pulverised coal as fuel

Correct : Option (A)

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