Question 674 Deck Safety

The correct answer is D) fusible link. Automatic fire dampers in ventilation systems are operated by a fusible link, which is a temperature-sensitive device that is designed to melt at a specific temperature. When the surrounding air reaches that temperature, typically around 165°F, the fusible link melts, allowing the fire damper to automatically close and prevent the spread of fire and smoke through the ventilation system. The other options are incorrect because they do not accurately describe the mechanism used to activate automatic fire dampers. Heat or smoke detectors, remote-operated valves, and CO2 system pressure switches are not the primary means of operating these types of fire dampers.