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Which of the following fire detection systems are commonly used in an engine nacelle?
Fire detection control unit
Thermocouple detector
Kidde continous-loop
Smoke alarm
The correct answer is: Kidde continous-loop
Continous-loop fire detection systems, also known as Kidde systems, are commonly used in engine nacelles due to their durability and reliability. Thermocouple detectors are typically used in proximity to the engine, but not within the nacelle itself. Fire detection control units and smoke alarms are not typically used in engine nacelles as they are not designed for the high temperatures and harsh environment of the nacelle.