Briefly describe the components of a thermal switch fire detection system
Temperature sensitive switches that complete a circuit at a specific temp
Are thermal switches wired in series or parallel with each other
Parallel
How are the detector units in a double-loop Fenwal system Wired
In parallel between two complete loops
In what way is a thermocouple fire warning system different from a thermal switch
Thermocouples detect rate of change, thermal switches respond to a specific temperature
Briefly describe the components of a Kidde continuous loop fie detection system
A Kidde system has an Inconel tube containing one or more wires embedded in a ceramic core
Briefly describe the components and operation of a Lindberg fire detection system
A stainless steel tube with inert gas and a material that absorbs some of the gas. When the tube heats up some of the gas is released raising the pressure in the tube, which activates a pressure switch
Describe the process or mechanism be which a photoelectric smoke detector generates a warning of a possible fire
Smoke refract light in the detector causing a photoelectric cell conduct electricity and trigger the alarm
How can the operation of a photoelectric smoke detector be tested
The test switch (duh)
Name two types of smoke detection systems used in aircraft
Light refraction (photoelectric) types and ionization types
What are the usual locations where a carbon monoxide detector would be installed
Cock pit or cabin
How does a carbon monoxide detector indicate CO
The tan spot turns Gray or Black
What are the possible effects of kinks and sharp bends in the sensing elements of a fire warning system
False fire warnings caused by short circuts
How is a Freon container checked for proper pressure
A chart that give pressure for present temperture
Name the two basic types of fire extinguishing systems
Conventional, High-rate discharge
Name the extinguishing agent most commonly used by conventional fire extinguishing systems
Carbon Dioxide
Name the extinguishing agent most commonly used by high-rate discharge
Halon (Freon)
How are Freon bottles protected from excessivly high temperatures and how can you tell that this has occured
A thermal fuse will release agent if the bottle temperature get to high, and blows out a red disk
What condition is indicated if the yellow disk is missing in a fire extinguishing system
Discharged normally
Describe the mechanize by which a Freon bottle is dischaged
An electrical signal fires an explosive squib, which ruptures a frangible disk
How is the service life of a discharge cartridge calculated
Date stamped on the cartridge by manufacturer