Fire Protection System Flashcards
In what area of an aircraft would you find a carbon monoxide detector?
Cabin and cockpit
What occurs when a visual smoke detector is activated?
A lamp within the indicator illuminates autmoatically
The types of fire-extinguisher agents for aircraft interior fires are
water, carbon dioxide, dry chemical and hologenated hydrocarbons
When air samples contain carbon monoxide, portable carbon monoxide detectors containing yellow silica gel will turn what color?
Green
Smoke detection instruments are classified by their method if
detection
Smoke detectors that use a measurement of light transmissibility in the air are called
photelectrical devices
A contaminated carbon monoxide portable test unit may be returned to service by
removing the indicating element and installing a new indicating element
Which fire-detection system measures temperature rise compared to a reference temperature?
Thermocouple
A carbon dioxide (CO2) hand held fire extinguisher may be used on an electrical fire if the
horn is nonmetallic
The proper fire extinguishing agent to use on an aircraft brake fire is
dry powder chemical
If an engine fire develops during the starting procedures, the first step you should take in extinguishing the fire is to
continue cranking to start and blow it out
Smoke in the cargo and/or baggage of an aircraft is commonly detected by which instrument?
Photoelectric cell
Light refraction smoke detectors are activated when the detector
senses light refracted from the smoke particles passing through a chamber
Why does the Fenwal fire-detection system use spot detectors wired parallel between two seperate circuits?
A short may exist in either circuit without causing a false fire warning
What type of thermally sensitive salt is used in Fenwal fire detection systems?
Eutectic salt
A fire extinguisher container can be checked to determine its charge by
weighing the container and its contents
What is the color code for fire extinguisher lines?
Brown
The most common cause of false fire warnings in a continuous loop fire detection systems is
dents, kinks or crushed sensor sections
A thermocouple in a fire warning system causes the warning system to operate because
it generates a small current when heated
The thermocouple fire-warning system is activated by a
rate-of-temperature rise
When used in fire detection systems having a single indicator light, thermal switches are wired in
parallel with each other and in series with the light
Built in aircraft fire-extinguishing systems are ordinally charged with
halogenated hydrocarbons and nitrogen
In reference to aircraft fire extinguishing systems;
1. During removal and installation, the terminals of discharge cartridges should be grounded or shorted.
2. Before connecting cartridge terminals to the electrical system, the system should be checked with a voltmeter to see that no voltage exists at the terminals connections
Both No.1 and No.2 are true
What method is used to detect the thermal discharge of a built-in-fire-extinguisher system?
A rupture of the red plastic disk in the thermal discharge line
The thermal switches of a bimetallic thermal-switch type fire-detection (single loop) system are heat sensitive units that complete circuits at a certain temp. They are connected in
parallel with each other, but in series with the indicator lights
On a periodic check of fire extinguishers, the pressure was not between minimum and maximum limits. What procedure should be followed?
Replace the extinguisher container
In some fire-extinguisher systems evidence that the system has been intentionally discharged is indicated by the absence of a
yellow disk on the side of the fuselage
If a fire extinguisher cartridge is removed from a discharge valve for any reason, it should be
used only on the orginal discharge valve assembly
Which of the following are fire precautions which must be observed when working in an oxygen system?
Display “No smoking” placards, provide adequate firefighting equipment, keep all tools and oxygen servicing equipment free from oil and grease and avoid checking aircraft radio or electrical systems
Which fire extinguishing agent is considered to be at least toxic?
Bromotrifluoromethane (Halon 1301)
Which fire extinguishing agent has less chance of reflash?
HALON 1211
Maintenance of fire detection systems include the
replacement of damaged sensing elements
A squib, as used in a fire protection system is a
device for causing the fire extinguishing agent to be released
How much water is allowed in a US gal of turbin fuel?
.0015%
