In the event of an exhaust duct fire, 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 __________.
• How fixed galley range fire-extinguishing systems are triggered without human intervention • Common heat-activated devices used in fire suppression systems (especially in ducts and hoods) • Differences between a temperature-sensing control and a fire-release device
• Which device in the choices is specifically designed to melt or physically release when exposed to high heat from a fire? • Which items in the list are more likely to be electrical/electronic controls rather than simple mechanical release devices? • In a hot, greasy galley exhaust duct, what type of simple, reliable trigger would designers prefer to avoid dependence on complex electronics?
• Identify which choice is commonly used in sprinkler and hood systems as a physical release element. • Eliminate any options that mainly function as sensors for control circuits rather than as a mechanical trigger for cables and springs. • Ask: which device would most logically be connected to a stainless-steel cable and spring to mechanically trip the system when heated?
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