1. Forced circulation is always used in high pressure power boilers. |
2. Soot blowers are used for cleaning tube surfaces at regular intervals. |
3. Electrostatic precipitator is used to remove fly ash from flue gases. |
A) 1, 2 and 3
B) 2 and 3
C) 1 and 3
D) 1 and 2
Correct Answer: B
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