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391 - ATPL - A gaseous sensor/responder tube fire sensor is tested by

Question 391 - Aircraft General Knowledge - Airframe, Systems, Powerplant - ATPL - Airline Transport Pilot license

Heating up the sensor with test power connection.
Checking the sensor with pressurized gas.
Checking the wiring harness for faults but not the sensor.
Checking the continuity of the system with a test switch.

Training tests and timed exam simulations ATPL - Airline Transport Pilot license