Question 673 Deck Safety

The correct answer is D) fusible links. Automatic fire dampers in ventilation systems are typically operated by fusible links. These links are designed to melt at a specific temperature, usually around 165°F, causing the damper to automatically close and prevent the spread of fire and smoke through the ventilation system. This is in accordance with regulations and standards such as NFPA 90A, which governs the installation of air conditioning and ventilating systems. The other options are incorrect because: A) heat or smoke detectors are not directly responsible for closing the dampers, B) remotely operated valves are not commonly used for this purpose, and C) CO2 system pressure switches are not the primary means of actuating the fire dampers.