Term
| How are Fenwal spot detectors wired? |
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Definition
| In parallel between two complete loops of wiring |
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Term
| What is a thermal switch fire detection system? |
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Definition
| Heat-sensitive units that complete electrical circuits at certain temperatures |
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Term
| How may a photoelectric smoke detector be checked? |
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Definition
| By using a test switch circuit |
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Term
| What is the indication of excess carbon monoxide fumes when using a CO tester? |
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Definition
| The tester changes color to green, dark gray or black |
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Term
| Where are carbon monoxide detectors normally used? |
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Definition
| Aircraft cabins and cockpits |
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Term
| How does a photoelectric smoke detector warn of possible fire? |
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Definition
| Smoke in the air will cause the photoelectric cell to conduct an electric current signal to a detector-amplifier |
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Term
| Name two types of smoke detection instruments used in aircraft. |
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Definition
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Term
| How are thermal switch units wired? |
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Definition
| Parallel with each other and in series with the light |
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Term
| How is the service life of a discharge cartridge calculated? |
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Definition
| From the manufacturers date stamp on the face of the cartridge |
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Term
| What may be caused by kinks and sharp bends in sensing elements of a fire-detection system? |
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Definition
| False fire-warning or an inoperative system |
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Term
| What is the purpose of the yellow disk in a CO2 bank fire-extinguisher system? |
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Definition
| It indicates a normal system discharge |
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Term
| What procedure is used to check a freon container for pressure? |
|
Definition
| A chart must be used for a minimum and maximum gauge reading for every change of temperature |
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Term
| What is the most common fire-extinguishing agent associated with a conventional system? |
|
Definition
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|
Term
| What a continuous element fire-detection system? |
|
Definition
| A stainless tube containing a discrete element which will produce gas with heat and a mechanical switch to activate the system |
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Term
| How is a thermocouple fire-warning system different from a thermal switch system? |
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Definition
| Thermal switch works at a specific temperature whereas the thermocouple depends on a rate of temperature rise |
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Term
| What a continuous loop-detection system? |
|
Definition
| One or more wires embedded in a special ceramic core that changes its resistance with a change in temperature |
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Term
| What are two types of fire-extinguishing systems? |
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Definition
| A high rate of discharge and a conventional system |
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Term
| What type extinguishing agent is usually found in a high-rate-of-discharge system? |
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Definition
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|
Term
| What protection is provided for a freon bottle in case of a temperature rise in excess of set limits? |
|
Definition
| A safety disk will rupture and spill the agent overboard |
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