Question 26Steam Plants - QMED

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Which statement is true concerning the operation of item 12 on the illustrated air register and burner assembly? Illustration SG-0016

Diagram for USCG Steam Plants QMED: Which statement is true concerning the operation of item 12 on the illustrated...
AThe air register doors should be fully open for an individual burner that is lit and throttled for an individual burner that is idle.
BThe air register doors should be throttled for an individual burner that is lit and fully closed for an individual burner that is idle.
CThe air register doors should be fully open for an individual burner that is lit and fully closed for an individual burner that is idle.
DThe air register doors should be fully open for all burners whether lit or not and fully closed for all burners only when the boiler is idle.
AI Explanation

The correct answer is C: The air register doors should be fully open for an individual burner that is lit and fully closed for an individual burner that is idle. This is because the air register doors control the air supply to the individual burners. When a burner is lit, it requires a full air supply for proper combustion. However, for a burner that is idle, the air register doors should be fully closed to prevent unnecessary air flow and heat loss. This ensures efficient and safe operation of the boiler system. The other options are incorrect because they do not properly match the air register door position to the operating status of the individual burners.

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Official Resources
46 CFR Machinery & Electrical 46 CFR Engineering USCG National Maritime Center
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