Jeppesen Airframe Oral Chapters 16-17

Briefly describe the components of a thermal switch fire detection system?
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Briefly describe the components of a thermal switch fire detection system?
Temperature sensitive switches that complete a circuit at a specific temperature and trigger a warning.
Are thermal switches wired in series or in parallel with each other?
Parallel
How are the detector units in a double-loop Fenwal system wired?
In parallel between two complete loops of wiring.
In what way is a thermocouple fire warning system different from a thermal switch system?
Thermocouple systems are sensitive to the rate of temperature change, whereas thermal switch systems respond to a specific temperature value.
Briefly describe the components of a Kidde continuous loop fire detection system.
A Kidde system has an Inconel loop whose resistance changes with temperature.
Briefly describe the components and operation of a Lindberg fire detection system.
A stainless tube contains an inert gas and a discrete material that absorbs some of the gas. When the tube heats up, some gas is released, raising the pressure in the tube, which activates a pressure switch.
Describe the process or mechanism by which a photoelectric smoke detector generates a warning of a possible fire.
Smoke particles refract light in the detector unit causing the photoelectric cell to conduct electricity and trigger the alarm.
How can the operation of a photoelectric smoke detector be tested.
By actuating a test switch.
Name two types of smoke detection systems used in aircraft.
Light refraction (photoelectric) and ionization types.
What are the usual locations where a carbon monoxide detector turns gray or black.
In the aircraft cockpit or cabin.