Engine Fire Protection Flashcards
What is the primary extinguishing agent for class B and C fires?
CO2
The core resistance material, which prevents current flow at normal temperatures, is the ________ continuous-loop fire detector system.
Kidde & Fenwal
Where do you discharge the fire-extinguishing agent?
Area between engine and cowling
The sensing element consists of a small (0.089 in OD) lightweight, Inconel tube with a pure nickel wire center conductor. With a length of 1.5 to 15 feet, is the ________ continuous fire detection system.
Fenwal
When you pull the fire handle it accomplishes which sequence of events?
closes fuel firewall Shutoff valve, Hydraulic firewall shutoff valve, pneumatic shutoff valve, Electrically disconnects generators, Arms discharge cartridges
All fire extinguishing systems for aircraft are required to incorporate indicators by which the system condition is shown. True or False?
True
Utilizing two separate agent containers for each area or by incorporating a cross feed system so that extinguishing agent can be drawn from either of two different containers for each engine is the _____ _____ feature.
Two shot
When a fire occurs, the temperature in the area of the active thermocouples will exceed the temperature of the reference thermocouple, causing a current to flow through sensitive relay. True or False?
True
When the Yellow indicator disk is missing it indicates what?
Normal discharge through firing of the squibs
Dry Powder is used for Class ______ Fires.
D
The system, when any portion of the sensor tube is exposed to fire, the gas absorption material immediately releases a large quantity of gas, which quickly increases the pressure in the tube to a level necessary to close the diaphragm switch is the _____________ system.
Systron-donner
A _______ disk and _______ disk retain the extinguishing agent in the (HRD) container.
Breakable & Fusible
The outer tube is constructed of stainless steel. Between the inner and outer tubes, an inert gas (helium) is contained under pressure. This is the __________ system.
Systron-donner
The Kidde system has two electric conductors. True or False
True
What electrically discharges the cartridge in the selected bottle allowing the extinguishing agent to escape into the plumbing?
The bottle discharge button
Single wire surrounded by a continuous string of ceramic beads within an inconel tube describes the ___________ system.
Fenwal
What is contained as a liquid, when released it becomes a gas, and smothers a fire by displacing the oxygen?
CO2
A feed-through electrical connector that passes though a firewall is a ________
connector.
Bulkhead
This type of fire detection system operates on the principle of a buildup of gas pressure within a tube proportional to temperature.
Systron-Donner
Each sensing loop is connected to its own electronic control circuit mounted on a separate circuit card to provide redundancy, thus ensuring operation of the system even if one side fails. This is the
_________ system
Kidde
Cracked compressor, a leaking bleed air duct, burn through in a combuster, or leaks in the exhaust can all be causes of engine nacelle overheat condition. True or False
True
When normal temperatures are reached, the gas absorption material reabsorbs the gas and the pressure drops, opening the switch and cutting off the alarm. This describes what system?
Systron- Donner
What is the purpose of isolating the reference thermocouple?
Isolates it from active thermocouples so reference isn’t affected by the engine heat
The sensing element responds to a specified degree of elevated temperature at any point along its entire length. What system is this?
Fenwal
What extinguishing agent is used in a carburetor fire?
CO2
What agent extinguishes a fire by displacing the oxygen in the immediate area?
CO2
Sensors routing is determined by the manufacturer where fires are most likely to occur. True or False?
True
What is the ATA code for fire protection?
26
What are the two types of fixed powerplant extinguishing systems?
Conventional and HRD (High Rate of Discharge)
When removing the squibs what precaution should be taken?
Short out the pins to prevent accidental discharge
Why do we wire the spot detectors in parallel?
So that an open may exist in the system without sounding a false alarm
When alarm temp is reached anywhere along the length of the tube, the gas pressure will cause the metal diaphragm to snap over and close the electrical contacts. What system is this?
Systron-Donner
What is the most common fire system on modern aircraft?
HRD/Halon
Powerplant fire systems operate automatically to discharge extinguishing agent in the event of a fire. True or False?
False
What system has the integrity switch and the diaphragm switch incorporated in the responder housing?
Systron-Donner
What system has a bimetallic thermoswitch that closes when heated?
Spot detector
The agent container incorporates a pressure switch that remains open when the container is pressurized. True or False?
True
The system would again produce a full fire alarm when?
The fire is reignited
What system utilizes a gas filled, sealed tube to provide a signal that actuates an alarm?
Systron-Donner
What system uses the rate of temp rise in the engine compartment as a basis for its operating principle?
Thermocouple
The Lindberg and the ________ fire detector systems use heat in its normal self test procedure.
Thermocouple
The extinguisher is activated by opening the guard and pressing the fire light in a _________ airplane.
Light-twin
In this system the resistance of the thermistor material decreases rapidly as the element is heated.
Kidde
In the Kidde system, when the resistance decreases as a result of a fire the sensing elements _______ a _______ that produces an alarm in the cockpit.
Form a ground
The explosive cartridge in the discharge valve of the fire bottle is not a life dated. True of false?
False
After a fire has been extinguished, the resistance of the eutectic salt in the sensor will?
Increase
What provides the force to rupture the disk seal in the fire bottle?
Squib
In nacelles of large reciprocating engines, overheat conditions may be caused by?
cracks or burns through the system
If a volume of gas is held constant, its pressure increases as temp increases. What systems are we talking about?
pneumatic systems
Which classmate is the FUCKING BEST
Eric obvy
