Fire Protection Flashcards
Are thermal switches wired in series or in parallel with each other
Parallel
How are the detector units in a double loop Fenwal system wired
Parallel between two complete loops of wiring
In what way is a thermocouple fire warning system different from a thermal switch system
Thermocouple systems are sensitive to the rate of temperature change, thermal switch systems respond to a specific temperature value
Briefly describe the components of a Kiddie continuous loop fire system
has a tube containing one or more wires embedded in a ceramic core whose resistance changes with temperature
Describe Lindberg fire detective system
Stainless steel tube contains an inert gas and material that absorbs some of the gas. When the tube is heated up some gas is released raising the pressure in the tube which activates a pressure switch
How can the operation of a photoelectric smoke detector be tested
Actuating a test switch
Name two types of smoke detection systems used in aircraft
Photoelectric, and ionization
What are the usual locations where a carbon monoxide detector would be installed
Aircraft cockpit cabin
How does a carbon monoxide detector indicate the presence of this deadly gas
Tan spot on the detector turns gray or black
What are the possible effects of kinks and sharp bends in the sensing elements of a fire warning system
False fire warnings caused by short circuit
How is a freon container checked for proper pressure
A chart is used to determine the maximum and minimum gauge pressure and readings are based on ambient temperature
Name the two basic types of fire extinguishing systems
Conventional systems and high-rate discharge system
Name the extinguishing agent most commonly used by conventional fire extinguishing systems
Carbon dioxide
Name the extinguishing agent most commonly used by high-rate discharge fire extinguishing systems
Halon 1301
How are Freon bottles protected from excessively high temperatures and how can you tell that this has occurred
Thermal fuse will release the agent if the bottle temperature is exceeded. This blows out a red indicator disk
What condition is indicated if the yellow disk is missing in a fire extinguishing system
The system has been discharged normally
How is the service life of a discharge cartridge calculated
From the date stamped on the cartridge by manufacture
What type of fire extinguisher is recommended for extinguishing a brake fire
Dry-powder type extinguisher
Briefly describe the components of a thermal switch fire detection system
Temperature sensitive switches that complete a circuit at a specific temperature and trigger a warning
How can you determine the state of charge of a CO2 fire extinguisher
By its weight
How can you tell the state of charge of a freon fire extinguisher
Pressure shown on the built in gauge
What is indicted if the red disk in a built in fire extinguishing system is blown out
An overheat condition has occurred
