Day 2 Progress Check Flashcards
How is the fire extinguisher agent charge status verified in many aircraft systems?
By using a visual gauge
What is the purpose of the thermal discharge indicator (Red Disc) in a fire extinguishing system?
To eject a red disc when container contents dump overboard due to excessive heat.
On large turbine aircraft, what is the purpose of the fire switch in the fire extinguishing system?
To shut off the engine, isolate it from the aircraft systems, and activate the fire extinguishing system.
Which of the following detects radiation of a specific wavelength to signal the presence of a fire?
Optical fire systems
What safety feature is incorporated into fire extinguisher containers to prevent pressure from exceeding the test pressure in the event of exposure to excessive temperatures?
Safety relief diaphragm
Dual-loop systems use which logic gate to increase reliability by reducing false fire warnings?
AND
What is a key advantage of the sensing element in a continuous-loop fire detection system?
Its resistance is influenced by the length heated and temperature, providing a nonarithmetic “average” response.
How is an electrical short detected in the Kidde continuous-loop system?
A rapid decrease in resistance
Why are two-way check valves used in a two-shot fire extinguishing system?
To prevent agent in a reserve container from backing up into the emptied main container
What is the potential consequence of excessive use of CO2 or other cooling extinguishing agents on a turbine engine?
Shrinkage of the turbine housing leading to engine disintegration
How is the integrity of the continuous-loop fire detection system tested?
By triggering a simulated fire using a test switch in the flight deck
What is the primary function of the thermal switches for engine fire detection?
Complete electrical circuits at a certain temperature
What is a disadvantage to the use of Halon 1301?
Ozone depletion
What is the most common extinguishing agent in aircraft use?
Halon 1301
Commuter aircraft certificated under 14 CFR part 23 must have:
A one-shot fire extinguishing system
