In a furnace employing forced draught as compared to induced draught______________________?
Correct answer: A. Positive pressure exists in the furnace
- A. Positive pressure exists in the furnace
- B. The fan operates hot and hence blades are liable to corrosion and erosion
- C. Air is sucked in, so air leaks are more and hence the furnace efficiency is reduced
- D. None of these
Explanation
A forced-draught fan pushes combustion air into the furnace, producing pressure above atmospheric pressure. Induced draught instead creates negative furnace pressure and can draw air in through leaks.
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