Artificial draught produced by a fan in the furnace can be controlled by the___________________?
Correct answer: A. All A., B. and C.
- A. All A., B. and C.
- B. Damper
- C. Variation in the pitch of fan blades
- D. Speed of the fan
Explanation
Fan-produced draught can be adjusted by changing fan speed, throttling with a damper, or varying blade pitch in a controllable fan. Hence, all three methods can regulate the air or flue-gas flow.
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