Ingress of cold air in the furnaces through cracks, charging doors, openings etc

Question

Ingress of cold air in the furnaces through cracks, charging doors, openings etc.

Options:

A . Reduces the flue gas temperature and makes the furnace atmosphere oxidising

B . Increases the load on the induced draft fan

C . Reduces the furnace draught

D . All of the above

Answer: Option D

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