Fire Alarm Communications Flashcards
What are the 2 basic types of detection devices?
Fixed temperature device
Rate of rise detectors
What are the 4 basic types of automatic alarm-initiating devices?
Heat
Smoke
Fire gases
Flame
Fixed temperature devices activate by what 3 mechanisms?
Expansion
Melting
Change in resistance
A detection device that holds electrical contacts apart
Frangible bulb
Uses 2 metals that have different thermal expansion characteristics
Bimetallic detector
Detector that operates on the assumption that the temperature in a room will increase faster
Rate of rise
What is the most common rate to rise spot detector?
Pneumatic spot detector
What are the 2 basic types of smoke detectors?
Photoelectric
Ionization
What is another word for radioactive material?
Americium
What are the 3 basic types of flame detectors?
Ultraviolet
Infrared
Both
What are the 3 basic types of auxiliary systems?
Local energy
Shunt
Parallel telephone
Similar to auxiliary systems but are connected to the fire department telecom center
Remote station
Used to protect large commercial and industrial buildings
Proprietary system
Similar to proprietary systems except that the receiving point is off site
Central station system
2 types of sprinkler coverage
Complete
Partial
The pipe that connects everything
Riser
3 of the most commonly used release mechanisms to activate sprinklers?
Fusible links
Frangible bulbs
Chemical pellets
3 basic positions for sprinklers?
Pendant
Upright
Sidewall
A valve that showed at a glance whether it is open or closed
Indicating control valve
How many inches is the Siamese connector for sprinkler systems?
2 1/2 inches
5 major applications of sprinkler systems?
Wet-Pipe Dry-Pipe Reaction Deluge Residential
