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E. Engine fire prot
Engine fire prot 5
| Question | Answer |
|---|---|
| What types of fire detector systems are used for engine fire detectors? (3) | Overheat, rate of rise, and flame detectors. |
| How does a thermal switch fire protection system operate? | When heated past a predetermined temperature, the switch closes causing the warning devices in the cockpit to activate. |
| How many thermal switches are needed in a thermal switch fire protection system? | At least one. |
| What kind of fire detection system allows more complete coverage than a spot type system? | A continuous loop system. |
| What happens if an engine equipped with a thermocouple fire warning system overheats slowly? | Nothing, because a fast temperature rise or rapid heating is required for this type of fire system to operate. |
| What electrical power is required for a thermocouple fire protection system to operate? | Both the thermocouple-produced power and the aircraft electrical system are required for this type of fire protection system to operate. |
| What is the likely cause of a false fire warning? | The engine fire sensing loop is bent or kinked excessively. |
| What are fire extinguishing systems designed to do? | They are designed to dilute the oxygen levels around the engine to a point that does not allow combustion, or to reduce temperatures below the ignition point. |
| What elements must be present for a fire to occur? | An ignition source such as heat or a spark, fuel and oxygen. |
| What group of fire extinguishing agents are no longer manufactured because of environmental concerns. | Halons(or freon or chlorofluorocarbons [CFCs] were no longer manufactured after 1995. However existing stocks of CFC may still be used and are subject to strict handling and disposal regulations. |
| How are fire extinguishing agents distributed? | Through perforated tubing and/or discharge nozzles. |
| What is the purpose of the discharge cartridge and how is it activated? | The discharge cartridge, or squib, which is electrically ignited, fires a projectile into the frangible disk, thereby releasing fire extinguishing agent. |
| How is a fire extinguisher system with a high rate of discharge classified? | As an HD fire extinguisher system. |
| What do red and yellow discs in a fire extinguishing system indicate? | A yellow disc indicates a normal discharge. A red disc indicates a thermal disc. |
| How is the fire extinguishing agent in an HRD system distributed, and how long does it take to discharge? | The agent is distributed through a series of high pressure tubes and takes one to two seconds to discharge. |
| What is the purpose of a pressure gauge in a fire extinguishing system? | Indicates pressure within the container. To check if the pressure is within limits,a pressure-temperature chart is used. |
Created by:
Justin84
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