Day 12 Progress Check part2 Flashcards
In which scenario would the use of a dry powder extinguisher be more appropriate than other types of extinguishers in aviation?
To combat a fire involving combustible metals like magnesium or titanium.
Given the environmental impact of Halon, why has aviation been granted an exemption to continue its use in fire suppression?
Aviation has unique operational and safety requirements that make Halon indispensable for now.
Why is it critical for portable fire extinguishers in personnel compartments to minimize the hazard of toxic gas concentrations?
To prevent any additional harm to passengers and crew during a fire event.
Why are Halon extinguishers preferred over CO2 extinguishers for use inside the aircraft?
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Halon leaves no residue and is electrically non-conductive, making it safe for sensitive equipment.
Why is CO2 not recommended for use in handheld fire extinguishers for internal aircraft fires?
CO2 can cause visual obscuration, making it difficult to see inside the cabin during deployment.
Why are fire extinguishing systems in lavatories designed to discharge automatically?
To ensure that fires in areas with limited crew monitoring are quickly extinguished.
What is the main reason Halon 1301 continues to be used in modern aircraft, despite its environmental impact?
Its effectiveness and low toxicity make it the safest option currently available for aviation use.
What is the primary reason for using a yellow disc discharge indicator in aircraft fire extinguishing systems?
It provides a visual indication that the flight crew has manually activated the fire extinguishing system.
How does the two-shot system with a two-way check valve improve fire suppression in cargo compartments?
It ensures that extinguishing agent is directed only into the affected compartment without loss of pressure.
What is the primary function of carbon dioxide (CO2) in aviation fire extinguishing systems?
To displace oxygen and create an atmosphere where combustion cannot occur.
How does the design of High Rate Discharge (HRD) bottles contribute to the effectiveness of fire suppression in aircraft engine compartments?
They discharge a large quantity of extinguishing agent in 1 to 2 seconds, quickly suffocating a fire.
What is a key safety feature of discharge valves in aviation fire extinguishing systems?
They are designed to release extinguishing agents automatically in the presence of high heat.
Why is the use of water extinguishers limited to Class A fires in aviation?
Water can react dangerously with flammable liquids and electrical equipment.
How do smoke detectors in cargo compartments contribute to overall fire protection in large aircraft?
They ensure early detection of smoldering fires that may not produce enough heat for other detectors to activate.
Why is the weight of fire extinguishing systems such as HRD bottles and their associated components critical in aircraft design?
Weight affects the performance of the aircraft and the overall fuel efficiency.
