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AIRFRAME 16
Fire Protection Systems
| Question | Answer |
|---|---|
| Where are carbon monoxide detectors normally used? | In aircraft cabins and cockpits |
| What are indications of excess carbon monoxide fumes when using CO testers? | For chemical tabs, the tab changes color due to a chemical reaction. More sophisticated detectors provide a digital output in parts per million of carbon monoxide present or illuminate a light and or an audible alarm sound |
| How does a light refraction type (photoelectric) smoke detector warn of possible fire? | Smoke in the air will cause the photoelectric cell to conduct an electric current |
| How may a photoelectric smoke detector be checked? | By the use of a switch in the test circuit |
| Name two types of smoke detection instruments used in aircraft | Light refraction (photoelectric) and Ionization |
| How are thermal switch unites 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 a 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? | C02 and Halogenated Hydrocarbons |
| What type of extinguishing agent is usually found in a high-rate-of-discharge system? | Halogenated hydrocarbon type agents (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 (disk) |
| What is the purpose of the yellow disk in a fire extinguisher system? | It indicates 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 |
| How is the service life of a discharge cartridge calculated? | From the manufacturers date stamp on the face of the cartridge |
Created by:
Chisum
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