• Shuffle
    Toggle On
    Toggle Off
  • Alphabetize
    Toggle On
    Toggle Off
  • Front First
    Toggle On
    Toggle Off
  • Both Sides
    Toggle On
    Toggle Off
  • Read
    Toggle On
    Toggle Off
Reading...
Front

How to study your flashcards.

Right/Left arrow keys: Navigate between flashcards.right arrow keyleft arrow key

Up/Down arrow keys: Flip the card between the front and back.down keyup key

H key: Show hint (3rd side).h key

A key: Read text to speech.a key

image

Play button

image

Play button

image

Progress

1/50

Click to flip

50 Cards in this Set

  • Front
  • Back
  • 3rd side (hint)
Data compiled by Factory Mutual Research Corporation indicates that about __% of all fires are controlled by the activation of ____________ sprinkler heads.
70%

five or fewer
page 559
Protected premises fire alarm systems
Only alerts occupants of the need to evacuate the premises. Also known as local system.
page 559
Fixed-Temperature Heat Detection
Are set to alert when they detect a given temperature. They are the least expensive, least prone for accidental activation, but are also the slowest to activate. They detect heat by one or more of three primary principles of physics; expansion of heated material, melting of heated materials, and/or changes in resistance of heated material.
page 560
Fusible and frangible bulbs heat detectors
Work much like a sprinkler head, the link or bulb holds the electrical contacts apart, when enough temperature is reach that that link or bulb breaks the detector is activated. Many times must be replaced after use, no longer manufactured.
page 560-561
Continuous line heat detector
Two different types.
-One has a conductive metal inner core with a stainless steel tubing separated by an electrically insulated semiconductor material that keeps them from touching by a small flow of electricity. When a predetermined heat reaches it it interrupts and increases the flow electricity activating the alarm. Will reset itself after heat reduces.
-Another type uses two insulated wires within an outer cover. When a predetermined temperature reaches the cord it melts the insulation allowing the cords to touch activating the alarm. To restore the area of wire must be replaced.
page 561
Bimetallic heat detector
Two different types.
-One uses two metals that have different expansion rates, bonded together, and both ends are attached to alarm circuit. When heated one metal expands faster than the other causing the strip to arch or bend activating the detector.
-Other type uses a snap disk to do the same principle.

Will reset self when cooled, but should be check for damage.
page 561-562
Rate-of-Heat Detectors
Activate when the temperature increases rather than at a fixed temperature. Usually set to signal when temperature rise exceeds 12 to 15 degrees per minute. If not damage will automatically reset.
page 562
Pneumatic rate-of-rise spot detector
A dome-shaped air chamber with a small metering hole allows air to enter and exit the chamber during normal temperature change. In fire conditions the air expands faster than it can escape creating pressure in the dome, forcing the metal diaphragm against contact points and signaling the alarm.
page 562
Pneumatic rate-of-rise line detector
Work much in the way that spot detectors do, however is able to cover wide areas. It consist of tubing arranged over a wide area that act in the same matter as the spot detector.

Refer to spot detector.
page 562
Rate-compensated rate-of-rise t
Design for areas the are subject to normal temperature change. Consist of an outer metallic sleeve that encases two bowed struts that have a slower expansion rate with a electrical contact on them. In normal conditions they will not come in contact but under fire conditions the rapid heat change they will cause expansion to reduce the tension on the inner strips and allow contact, thus initiating the alarm.
page 563
Thermoelectric rate-of-rise detector
Design by twisting two wires of dissimilar metals together, when heated at one end an electrical current is generated at the other end. Rapid changes in temperature results in larger amounts of current flow and activation of the alarm.
page 563
Smoke detector
Respond to smoke initiate an alarm much quicker than a heat detector. Two basic types photoelectric and ionization.
page 563
Photoelectric smoke detector
Primary design is a beam from a "light source" to a receiver. When this is interrupted by smoke the beam can not reach the receiver and the alarm activates. Also refer to as visible products-of-combustion detector.
page 563-564
Ionization smoke detector
Uses combustion from smoke detected by a tiny amount of radioactive material in a chamber of the detector. Current flows through the chamber under normal conditions, when smoke enters it cause the chamber to be less conductive activating an alarm signal.
page 564
Batteries in smoke detectors should be replaced when
when you change your clocks in the spring and fall.
page 565
Flame detectors
Three basic types; those that detect ultraviolet wave spectrum or UV, those the detect infrared wave spectrum or IR, or those that detect both. They will activate to other bright light sources, and will not activate if view is obstructed.
page 565
Fire-gas detectors
Few are in use, designed to be sensitive only to the gases produced by specific types of hostile fires and to ignore those produced by friendly fires. Only carbon dioxide and carbon monoxide can be monitor for general fires.
page 566
Automatic Alarm System
Activates alarm to an off-site alarm carrier.
page 567
Auxiliary system
Three basic types; the local energy system, the shunt system, and the parallel telephone system. These transmit the alarm directly to the dispatch.
page 567-568
Remote station system
Similar to auxiliary it transmit directly to the dispatch.
page 568
Proprietary system
Used to protect large commercial and industrial building, high rises, and groups of commonly owned buildings to its own system and its own security.
page 569
Central station system
When an alarm is alerted and it is sent to an off-site, contracted service point where it dispatches or contacts dispatch.
page 569
Sprinkler coverage can consist of...
complete or partial coverage depending on building and authority having jurisdiction.
page 571
NFPA Standard 13
Standard for the Installation of Sprinkler Systems

FYI:13D is for one and two family dwelling
page 571
List common reasons for sprinkler system failure:
-Partially or completely closed main water control valve
-Interruption to the water supply
-Damaged or painted sprinkler heads
-Frozen or broken pipes
-Excess debris or sediment in the pipes
-Tampering and vandalism
page 572
Riser
The vertical piping into which the sprinkler valve, one way check valve, FDC, alarm valve, main drain, and other components are attached.
page 572
Feed main
The pipe connecting the riser to the cross mains.
page 572
Cross main
The pipe connection the feed main to the branch line on which the sprinklers are attached. Cross mains extend past the last branch lines and are capped to facilitate flushing.
page 572
Deflector
Converts the standard 1/2" stream into water spray for more efficient extinguishment.
page 574
Quick-response mechanism
Develop for life safety purposes to offer an increase surface area to collect the heat generated by a fire faster thus activating much faster.
page 574
List and describe the 3 basic sprinkler head positions:
-Pendant-most common, which extends down from the underside of the pipe.
-Upright-sits on top of the piping.
-Sidewall-extends from the side of a pipe and runs along wall using a fan-shaped patter of water.
page 575
The function of changing a sprinkler head according to NFPA 13 and 13D is...
done by a representative(s) of the building's occupants who are qualified to perform the work on the system.
page 576
Control valve
Used to turn off the water supply to the system for maintenance. Should always be open after maintenance.
page 576
Retard chamber
Place that catches excess water from momentary water pressure surges.
page 577
Alarm test valve
Simulates the activation of the system by allowing water to flow into the retard chamber and operate the water flow alarm devices.
page 577-578
Inspector's test valve
Located in remote part(head outside, valve inside) on sprinkler system and is used to simulate the activation of one sprinkler head.
page 578
Water flow alarms
Hydraulic or electric, hydraulic just alerts occupants and other in immediate area that water is flowing in the system, which electric notifies a alarm company also.
page 578
A minimum water supply must be able to deliver the required volume of water to the highest sprinkler in the building at a residual pressure of _____.
15psi
page 578
The pumper supplying water to the FDC should have at least ________ or greater pumping capacity.
1,000 gpm
page 579
Wet-pipe system
Used in locations that will not be subject to temperatures below 40 degrees F and contain water under pressure at all times. Provides immediate discharge from sprinkler head.
page 580
Retard chamber
Reduces the chance of false water flow alarms by sending sudden surges of water to the "retard chamber."
page 580
Dry pipe system
Used in areas subject to freezing, all pipes are dry with air under pressure. When a sprinkler fuses, the air escapes and automatically opens to permit water into the pipes.
page 580
Preaction system
Used in areas where it is especially important to prevent water damage. The pipes are dry until a heat or smoke detection system activates.
page 581
Deluge system
Used in extra hazardous occupancies, and is design to provide the most water the fastest. All sprinkler heads are open. The pipes are dry until a detector or manual activation.
page 581-582
Sprinkler Head Temperature Rating 135F to 170F
Temp Classification: Ordinary
Color Code: Black or none
Color of bulb: Orange or Red
574
Sprinkler Head Temperature Rating 175F to 225F
Temp Classification: Intermediate
Color Code: White
Color of bulb: Yellow or green
574
Sprinkler Head Temperature Rating 250F to 300F
Temp Classification: High
Color Code: Blue
Color of bulb: Blue
574
Sprinkler Head Temperature Rating 325F to 375F
Temp Classification: Extra High
Color Code: Red
Color of bulb: Purple
574
Sprinkler Head Temperature Rating 400F to 475F
Temp Classification: Very Extra High
Color Code: Green
Color of bulb: Black
574
Sprinkler Head Temperature Rating 500F to above
Temp Classification: Ultra High
Color Code: Orange
Color of bulb: Black
574