Engine Fire Protection Systems Flashcards
Where are the fire switch normally installed
Center overhead panel, or center console in the flight deck
What are the main categories of engine fire protection system?
spot detection, continuous loop and flame detectors
Name examples of spot detection type system
thermal switch and thermalcouple
Name examples of continuous loop detection systems
Fenwall, kiddle, and pneumatic 
When using a thermocouple type fire detection system, what happens if the engine overheats slowly
Thermocouple depends on the rate of temperature rise, and it will not give warning if engine slowly overheat or as short circuits develop
How many thermocouples are required for engine fire detection
Depending on the size of the fire zone and total circuit resistant
Where does the thermocouple fire detector system get its electrical power to operate?
thermocouple produces power to close a relay, and the power from the aircraft electrical system flow through the rely relay to a warning light
Describe a thermal switch fire detector system
Have one or more lights that are energized by aircraft electrical system when a heat sensitive thermal switch closes to circuit at a specific temperature
How are thermal switch electrically connected to the circuit
Connected in parallel to each other but in series with the warning light. Temperature rise in any one of those section will cause a thermal switch to close which completes the circuit to indicate a fire all over heat condition
What is the most common cause of a false fire morning in a continuous loop detector system?
a dent,kinks or crush in the sensing element
Will the continuous loop fire detector still indicate the presence of a fire if the element is broken in two
Yes
What are the two methods used to discharge fire extinguishing agent
Electrical and mechanical
What method is used to release the fire extinguishing agent in a typical turbine engine fire protection system
Discharge valve that are operated by electronic discharge cartridge . Discharge plug is seated with a breakable desk that is rupture by the squib.
What method is used to determine the proper fire extinguisher container pressure
Check the container gauge to determine if the pressure is between the prescribed minimum and the maximum limit 
What is the color marking used to identify the fire extinguisher lines?
Brown tag what a row of black diamonds
What is the method other than the prescribed gauge is used to indicate low agent pressure in the container
Low pressure warning light in the cockpit
What is the purpose of a yellow and red discharge plug in a turbine engine fire extinguisher stone
Yellow plug indicate normal discharge , red plug indicates a thermal discharge
What what are the two methods commonly used to distribute the fire extinguisher agent to the engine?
Perforated tube and discharge nozzles
How does the fire extinguishing agent put out the fire?
It dilutes the atmosphere, so it will not support combustion
What does HRD stands for?
high rate discharge
How how is the fire extinguishing agent distributor from HRD system?
Deliver from the open and tubes
How long does it take to discharge the fire extinguishing agent in the HRD system?
1 to 2 seconds
Which type of fire detection system case a more complete coverage to a fire hazard
Continuous loop
