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157. The water-tube natural-circulation steam boiler on your general-purpose supply vessel is equipped with soot blowers for maintaining heat transfer efficiency. Which of the following statements best describes the conditions that must be met before tubes can be safely blown using the soot blowers?
Soot blowers require increased draft and lit fires to safely remove loosened soot from boiler tubes, preventing accumulation and fire hazards. Adequate draft ensures soot is carried out through the uptake, while lit fires maintain gas flow and temperature for effective removal.
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