Ingress of cold air in the furnaces through cracks, charging doors, openings etc ________________?
Correct answer: D. All A., B. and C.
- 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 A., B. and C.
Explanation
Leaking cold air dilutes and cools the flue gas, introduces excess oxygen that produces an oxidising atmosphere, and increases the gas volume handled by the induced-draft fan. These effects also disturb the intended furnace draught, so all three statements apply.
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