Sprinkler Systems Flashcards
(75 cards)
What are the two types of smoke detectors?
Photoelectric and Ionization
What are the three devices used to identify and alert the possibility of fire conditions?
Smoke Detectors
Heat Detectors
Flame Detector
What is the most common type of initiating detecting device?
Smoke Detector
What type of smoke detector detects smaller amounts of particles?
Ionization
What type of smoke detector will detect larger products of combustion?
Photoelectric
What type of smoke detector will uses radiation?
Ionization
What happens when smoke particles enters the chamber of an ionization smoke detector?
They neutralize the charged particles and interrupt the current flow.
Which type of smoke detector react more quickly in detecting a fast burning fire?
Ionization
Which type of smoke detector react more quickly in detecting a slow smoldering fire?
photoelectric
What does a photoelectric smoke detector use to detect particles of smoke?
A light beam and a photocell.
How does a photoelectric smoke detector detect the presence of smoke?
When smoke enters it reflects some of the light given off of the light beam on to the photocell, thereby activating an alarm.
What type of smoke detector is used to protect churches, atriums, airport terminals and such
A projected beam detector
Which detection device is less prone to nuisance alarms? Smoke Detector or Heat detector?
Heat Detector
What device can provide property protection but cannot provide reliable life safety protection?
Heat detector
What device would be used in smoky, dusty environments where other smoke detectors would not work as well?
Heat detectors
What are the two ways heat detectors are designed to operate?
- Fixed temperature
- React to a rapid increase in pressure.
What would be the typical temperature that a heat detector would be set at in a office building or light hazard occupancy?
138°
What would be a typical increase in temperature for a heat detector to react too?
12° temperature change over one minute
Which type of heat detector needs to be replaced after it has been initiated?
Fixed temperature heat detector
What type of heat detector is generally self restoring even after it has been initiated?
Rate of Rise Heat detector
What type of heat detector has a line that is strung across large areas such as an autorium and will react to any temperature change along the line?
A line heat detector.
What type of detector uses ultraviolet light waves to detect the possibility of fire conditions?
Fame Detector
What type of detector is often found in in places such as air craft hangers, fuel loading racks or certain areas where early detection is essential?
Flame detector
What detector responds to fire conditions the fastest?
Flame Detector