Week 8 Flashcards
What’s the primary difference between pre action and deluge systems?
Pre action are closed and deluge are open
Pre action systems are most often designed to protect properties where _____ ______ would be a concern
Water damage
Valves that control the supply of water in pre action and deluge systems must be capable of both _____ and ____ operation
Manual and automatic
Where are Listed pressure gauges on pre action valves required
Above and below pre action valves, and on the Air supply
Where are listed gauges required on deluge valves?
Below deluge valves and on the air supply
State 3 types of detection methods utilized in a pre action system
Electric, pneumatic, or hydraulic
Define single interlock
Admits water to sprinkler piping upon operation of detection devices
Define double interlock
Admits water to sprinkler piping upon operation of BOTH detection devices AND automatic sprinklers
Define non interlock
Admits water to sprinkler piping upon operation of detection devices OR automatic sprinklers
Describe three devices that can be used for electrical detection
Smoke detectors, light sensors, heat detectors, beam detectors, V.E.S.D.A systems.
Describe two devices that can be used for pneumatic detection
Pilot line, c-1 release, low pressure switch
Describe two devices that can be used for hydraulic detection
Pilot line, c-1 release.
State two principals that the c-1 release can operate on
Rate of rise release, fixed temperature release
Where shall manual operation of the detection system on a combined dry pipe and pre action system be placed
Not more than 200 ft of travel
