Fire protection systems Flashcards
Where are carbon dioxide systems usually used?
Cabins and cockpits
Indications of excess CO2 fumes using a CO2 tester?
yellow silica gel Turns green or tan tablet turns dark gray or black
How does a photo electric smoke detector warn?
Smoke causes an electrical current
Two types of smoke detection instrument used in aircraft?
Photo electric and visual
What does a thermal switch fire detection system consist of?
Heat sensitive units that complete circuits at certain temperatures
How many photo electric detectors be checked?
Switch and test circuit
How are thermal switch units wired?
Parallel with each other and and series with the lights
How are Fenwal spot detectors wired?
Parallel between to complete loops of wiring
How is a thermocouple fire warning system different from a thermal switch system?
Thermal switch works at specific temperatures; thermal couple system depends on rate of use
What does a continuous loop system consist of?
One or more wires in bedded in a special ceramic core that changes resistance with temperatures
What is a continuous element fire detection system?
Stainless loop containing a discreet element that produces gas when heated and a mechanical switch
Two types of extinguishing systems?
High rate of discharge and conventional
Most common agent used in conventional system?
Carbon dioxide
Agent found in high rate discharge?
Halogenated hydrocarbon (halons)
How do you check fire bottles for pressure?
Use chart for temperature and pressure’s
