Fire Protection Q’s Flashcards
A hand held fire extinguishers weight is stamped on the
Head
An indication pin protruding from a portable fire extinguisher what does it indicate
Bottle is empty
A cabin hand held fire extinguisher by regulation must be operated by
A single handed operation
C02 fire extinguishers are used on
All fires in fuselage
Extinguishants suitable for use in cabins are
Water and BCF
Hand held fire extinguishers are weighed
In accordance with the approved maintenance schedule
How can a fire extinguisher be incentivised as being used
Weighed
How many fire extinguishers are required on an aircraft having 401-500 pax
6
How many fire extinguishers are required on an aircraft having 501 pax
7
How often do handheld extinguishers have to be weighed
Annually
Portable fire extinguishers are operated by
Breaking the tell tale / tamper proof seal then operated by the handle
The weight of an extinguisher is stamped on
The head fitting
What are the minimum number of fire bottles on a cabin with 201-300 pax
4 fire extinguishers
What fire extinguisher is used in the cockpit
C02
A mixed fire extinguishing system is where
More than one extinguishant is used
The resistive type fire wire is fitted in rubber grommets to
Prevent damage by vibration
A capacitance fire wire
Will work but not test if broken circuit
The single cell photo electric smoke detector
Relies on the production of a DC supply from a photoelectric cell
A cargo compartment which will contain a fire itself and ventilate
Must be modified to a class C or E compartment
A cargo compartment which will contain a fire itself and ventilate is a
Class D
The electrical supply for a two shot fire extinguishing system is
DC from the essential bus
A cockpit check on the engine fire wire system is a
Function check
A fixed system fire bottle is weighed
Without blanks and with detonators
If a fire bottle over pressurised
All extinguishant is lost
A fire detection loop must be capable of
Using master warning visual and aural signals
A thermocouple fire detector
Produces a DC supply when fire is detected
A fire detection system can pass through one zone to another providing
The system is protected
A fire detection system should be
Positioned in a location determined by the manufacturer during the design
In overheat conditions the resistance of the resistive type fire wire
Decreases
Fire wires
May have one or both ends connected to the control box depending on type
A fire detection zone wiring can pass through another fire zone when
The system and the extinguishing are the same
The apu fire shut off valve is normally
Normally electrically operated as the apu is electrically shut down by its own monitoring system
A fire test is carried out and the test button is released but the light remains on this is because
There is a fire
A fire that can be put out by a crew member in a cargo bay is in a
Class b compartment
A short circuit on a capacitive type fire detection element will result in
System does not work and no readings
A Systron dinner fire detection system used
Helium gas
A toilet is fitted with thermal protection
To protect against the dangers of smoke and fire in the event of of an overheat
Chemical fire extinguishers extinguish fires by
Reacting with the oxygen in the air or the flame rendering it inert
Continuous type fire wire detector system operates on the principle of an increase in temperature causing
A decrease in resistance
Engine fire bottle pressure at 70f is
600psi +- 25
Engine fire bottle pressure switches are operated by
DC
Engine wing fire bottles should be charged with nitrogen at 15c to
600psi
Fire extinguishment must kept within temperature limits
To minimise possibility or discharge at high temperatures
Fire resistance requirements for helicopter fabrics are in
CS29
A fire test on aircraft internal furnishings must be carried out
Only when equipment items fail random tests
Fireproofing of cabin material should be done
When a sample fails
First digit number of halogenated hydrocarbon extinguishers represents the number of
Carbon atoms
For multi engined rotorcraft the quantity of fire extinguishing agent available must
Provide at least two discharges for each fire zone
In a capacitive fire detection system if
There is a break the system will work but not test satisfactory
In a gas FireWire system what causes the FireWire caption to come on when heat is applied
Pressure
In a single continuous loop fire detector test
Current is passed down the centre conductor
In a toilet smoke condition what would be the indication
Either a light or an audible warning in the cabin
In the event of a crash landing
Most fire bottles are set off automatically
In the event of a fire being caused by the oxygen supply
Oxygen supply must be stopped
In which of the following would expect to find a smoke detector
Battery bay
Information on cabin furnishings fire protection requirements can be found in
CAP 747
Insulation resistance check of a continuous type fire wire detector element should be carried out
To include the element it’s sensing amplifier and associated relays
Lavatories must have in the disposal container
Freon extinguisher with black ball markings indicating when discharged
On pulling the fire handle the aural warning
Goes off the light remains on the generator goes offline
Smoke detectors consist of a
Photoelectric cell detecting 10% smoke
The fire detection system of an aircraft must contain
Approved quick acting fire or overheat detectors in each designated fire zone
The outside casing of a fire wire has
Same potential as ground
Toilet fire detection issues can be found in
AWN 83
(Now transferred to cap 747 GR no 20)
Toilet smoke detector activate
A warning light and or indication in the cabin
What do you check when carrying out an insulation check on a continuous FireWire loop
The FireWire
What external warning is there for an apu fire
Both aural and red light
What is the contamination monitor for in a Systron dinner fire detection system
Dirty contacts
What is used to measure squib resistance of a fire bottle
Safety ohmmeter
What test is carried out to ensure serviceability of a squib
A continuity check
What type of gas is used as a propellant for a high rate of discharge extinguishing system
Nitrogen
When a fire test on a Systron donner fire detector system is carried out
It checks the integrity of the contacts
When testing a squib for insulation
Short all pins together then test between them and the case
When the external apu fire switch is selected what happens
Fuel shut off
Electrical power cut off
Bleed air cut off
Fire bottle operated
When the fire handle is operated it
Cuts of field current, hydraulics and fuel and operates fire extinguishers
When the fire handle is pulled a
Red warning light stays on generator hydraulics and fuel is cut off
Which areas of a civil transport aircraft would have smoke detectors fitted
Freight holds baggage compartments and equipment bags
With the gas operated type of fire wire a local very high temperature will cause
An avalanche gas to be given off
You would expect to find a squib connected to
A fire surpression system
