Question 681 Deck Safety

70% to pass

Fusible link fire dampers are operated by _______________.

A a break-glass and pull-cable system
B a mechanical arm outside the vent duct
C the heat of a fire melting the link
D electrical controls on the bridge
AI Explanation

The correct answer is C) the heat of a fire melting the link. Fusible link fire dampers are designed to automatically close when exposed to the heat of a fire, shutting off the air flow and preventing the spread of fire and smoke through vent ducts. The fusible link is made of a metal alloy that melts at a specific temperature, typically around 165°F, causing the damper to close. This passive system does not rely on electrical controls or a manual break-glass system, making it a reliable way to contain fires without human intervention. The other options, while potentially used for other fire suppression systems, are not how fusible link dampers operate.

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Official Resources
46 CFR Lifesaving Equipment USCG Marine Safety Center USCG National Maritime Center
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