Fire Alarm and Detection Systems Flashcards
FIRE ALARM AND DETECTION SYSTEMS
What is the max distance a pull station can be from any location on a floor?
Not more than 60 meters
FIRE ALARM AND DETECTION SYSTEMS
What is the most common temperature setting on a fusible heat detector?
57c is most common
also available are 93°c and 140°c
FIRE ALARM AND DETECTION SYSTEMS
At what rate does a rate of rise alarm go off?
9°C per minute or higher
FIRE ALARM AND DETECTION SYSTEMS
What size particle does an ionization smoke detector react too?
0.01 to 1.0 micrometers
particles that are 10 micrometers or smaller are invisible to the human eye
FIRE ALARM AND DETECTION SYSTEMS
what sprinkler system components must be maintained?
- water supply shut off
- gate valve
- pressure pumps
- fire pump power
- PIV
- air pressure supervisory devices (dry pipe systems)
FIRE ALARM AND DETECTION SYSTEMS
Where is pressure switch installed? (sprinkler systems)
wet system - in the retard chamber
dry system - in the intermediate chamber
FIRE ALARM AND DETECTION SYSTEMS
What are the four sections of a fire alarm control unit?
- power
- common control
- alarm initiating circuits
- alarm signaling circuits
FIRE ALARM AND DETECTION SYSTEMS
What power source feeds an alarm system
a fused source of 115 volts with a lockable red painted fused disconnect switch labelled ‘FIRE ALARM”
FIRE ALARM AND DETECTION SYSTEMS
How fast must power source transfer be?
main source to stand by is no more than 15 seconds
stand by to main source no more than 5 mins
FIRE ALARM AND DETECTION SYSTEMS
what are the three basic styles of annunciators?
- LED or bulls eye type
- back lit type
- graphic type
