Fire Protection Systems Flashcards
Where are carbon monoxide detectors usually used?
Cockpit and cabins
How does a light refraction type smoke detector warn of possible fire?
Smoke in the air will cause the photoelectric cell to conduct an electric current
What are indications of excess carbon monoxide fumes when using CO testers?
For chemical tabs, the tab changes color.
More sophisticated detectors provide a digital output in parts per million of carbon monoxide present or illuminate a light and/ or an audible alarm sounds
Name two types of smoke detection instruments used in aircraft
Light refraction and Ionization
How may a photoelectric smoke detector be checked?
By use of a switch in the test circuit
How are thermal switch units wired?
Parallel with each other and in series with the light
How are Fenwal sensing elements wired?
Connected in series to a control unit
How is a thermocouple fire warning system different from a thermal switch system?
A thermal switch system works at a specific temperature whereas the thermocouple system depends on rate of temperature rise
What does a continuous loop detection system consist of?
One or more wires imbedded in a special ceramic core that changes its resistance with a change in temperature
What are two types of installed fire extinguishing systems?
CO2 and Halogenated Hydrocarbons
What type extinguishing agent is usually found in a high rate of discharge system?
Halons
What procedure is used to check a fire extinguisher container for pressure?
A chart must be used for determining minimum and maximum gauge reading based on temperature
What protection is provided for a fire extinguisher bottle in case of a temperature rise in excess of set limits?
The agent dumps overboard ejecting a red thermal discharge indicator
What is the purpose of the yellow disk in a fire extinguisher system?
It indicated a normal system discharge
What indications may be caused by kinks and sharp bends in sensing elements of a fire detection system?
False fire warnings, caused by a short
