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Home > Exam Questions > ATPL - Airline Transport Pilot Licence > Aircraft General Knowledge - Airframe, Systems, Powerplant > In a conventional thermal-switch fire-warning circuit, how does a heat-sensitive detector initiate a fire or overheat warning?

604 - ATPL Question Bank in English - In a conventional thermal-switch fire-warning circuit, how does a heat-sensitive detector initiate a fire or overheat warning?

Question 604 - Aircraft General Knowledge - Airframe, Systems, Powerplant - ATPL - Airline Transport Pilot Licence

It waits for the crew to select an extinguisher bottle before closing the warning circuit

It requires every detector in the circuit to reach exactly the same temperature

It must always wait for a second independent detection loop to operate

It closes the warning circuit when its temperature exceeds the specified threshold

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