Question 301Safety & Environmental - 1st Asst/Chief

You are correct, the answer is A) fusible link. In the event of an exhaust duct fire on a vessel, most dry chemical and carbon dioxide galley range fixed extinguishing systems are automatically activated through the action of a stainless steel cable, spring, and a fusible link. The fusible link is designed to melt at a predetermined temperature, triggering the release of the extinguishing agent to suppress the fire. The other options are incorrect because: B) a stack switch is not involved in the automatic activation of the extinguishing system, C) a thermostat would not be the primary mechanism for automatic activation, and D) a pyrostat is not a common component in these types of fixed fire extinguishing systems.