Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Week 8 Block Test 9 > Chapter 36 Fire Detection, Protection and Suppression Systems > Flashcards

Chapter 36 Fire Detection, Protection and Suppression Systems Flashcards

1
Q

False Alarms

A

caused by malfunctions in system or placement, all alarms should be treated as true emergencies until proven otherwise.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

Fire alarm components

A
  1. alarm initiation device
  2. alarm notification device
  3. fire alarm control panel
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

Alarm initiation device

A

either an automatic or manually operated device that when activated causes the system to indicate an alarm.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

Alarm notification device

A

generally an audible device, often accompanied by a visual device, alerts the building occupants when the system is activated.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

Fire alarm control panel

A

serves ast the brain of the system linking the activation devices to the notification devices

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

Remote annunciator

A

enable s fire fighters to ascertain the type and location of the activated alarm device as they enter the building.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

Fire alarms are powered by?

A

110 volt line or lithium 10 year lithium battery

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

single station smoke alarm

A

most common type of residential

  1. safety detection device
  2. an automatic control unit
  3. audible alarm within a single unit
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

Ionization

A

detectors are triggered by the invisible products of combustion. Electrically charged microscopic particles.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

Photoelectric

A

use a light beam and a photocell to detect larger visible particles of smoke. smoke prevents it from striking the photocell

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

Manual pull-station

A

such a station has a switch that either opens or closes an electrical circuit to activate the alarm.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

Single-action pull stations

A

require a person to pull down a lever toggle or handle to activate the alarm. sounds as soon as the pull station is activated.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

Double action pull stations

A

require a person to perform wot steps before the alarm will activate. Designed to eliminate false alarms

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

Tamper alarm

A

clear plastic covering sounds its own alarm when opened.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

Smoke detector

A

designed to sense the presence of smoke.

commonly found is schools, hospitals business and commercial occupancies

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

Beam detector

A

a type of photoelectric smoke used protect large open areas

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

Obscuration rate

A

or percentage of light blocked

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

Heat Detectors

A

also commonly used automatic alarm initiation devices. provide property protection but cannot provide life-safety protection because they do not react quickly enough to incipient fires.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

Spot Detectors

A

individual units that can be spaced throughout an occupancy, so that each detector covers a specific floor area. Light commercial residential settings

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

Fixed Temperature heat detectors

A

the name implies are designed to operate at a preset temperature
1. usually 135 degrees include metal

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
21
Q

Rate-of-Rise Heat Detector

A

will activate if the temperature of the surrounding and rises more than a set amount in a given period of time. “greater than 12 degree in 1 minute”

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
22
Q

Bimetallic strip

A

made of two metals that respond differently to heat: raid causes the strip to bend unevenly which opens and closes switch. also air chamber/diaphragm mechanism. increase in heat increase in pressure activates

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
23
Q

Line Detectors

A

use wire or tubing strung along the ceiling of large opens areas to detect increase in heat

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
24
Q

Flame Detectors

A

specialized devices rare and expensive. they detect electric magnetic light waves produced by flames (air craft carriers)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
25
Q

Gas Detectors

A

calibrated to detect the presence of a specific gas that is created by combustion or that is used in the facility. Commercial or industrial applications

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
26
Q

Air Sampling detectors

A

continuously capture air samples and measure the concentrations of specific gases or product of combustion.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
27
Q

Automatic sprinkler systems

A

usually connected to the fire alarm system, will activate the alarm if a water flow occurs.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
28
Q

Malicious False Alarms

A

when individuals deliberately activate a fire alarm when there is no fire and causes a disturbance.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
29
Q

Unwanted alarms

A

occurs when an alarm system is activated by a condition that is not really an emergency.

30
Q

Nuisance Alarms

A

caused by improper functioning of an alarm system or one of its components

31
Q

Cross-zoned system

A

activation of a single smoke detector will not sound the fire alarm

32
Q

Verification system

A

there is a delay of 30 to 60 second between activation and notification. (pre alarm before full alarm)

33
Q

temporal 3 pattern tone

A

produced by audio device usually with a visual aid for the hearing impaired and blind.

34
Q

Categories of alarm annunciation systems

A

noncoded alarm, zoned noncoded alarm, zoned coded alarm, master-coded alarm

35
Q

noncoded alarm

A

no info is given on what the device was activated or where it is located.

36
Q

zoned non coded alarm

A

control panel indicates the zone in the building that was the source of the alarm. it may also indicate the specific device that was activated.

37
Q

zoned coded alarm

A

indicates over the audible warning device which zone has been activated. usually used in hospitals where it is not feasible to evacuate the entire facility.

38
Q

Master-coded alarm

A

system is zoned and coded. audible warning devices are also used for other emergency related functions.

39
Q

local alarm system

A

does not notify fire dept. occupants must call FD

40
Q

remote station system

A

sends signal to fire department.

41
Q

auxiliary systems

A

be used in jurisdictions with a public fire alarm box system.

42
Q

Fire gong

A

activated by moving water

43
Q

Proprietary system

A

building fire alarms are connected directly to a monitoring site that is owned and operated by the building owner. central control panel

44
Q

central station

A

third party (ADT) off site monitoring facility that monitors multiple alarm systems.

45
Q

Basic components of an automatic sprinkler system

A

sprinkler heads, piping, control valve, and water supply

46
Q

Automatic sprinkler heads components (3)

A
  1. 1/2 inch orifice
  2. deflector
  3. release mechanism
47
Q

Fusible-link sprinkler heads

A

use metal alloys that melt at certain temps

48
Q

Frangible bulb sprinkler heads

A

a glass bulb filled with glycerin or alcohol to hold the cap in place

49
Q

Chemical pellet sprinkler heads

A

use a plunger mechanism and a small chemical pellet to hold the cap in place.

50
Q

Early suppression fast response sprinklers

A

have improved heat collectors that speed up the response and ensure rapid release of water.

51
Q

Deluge heads

A

easily identifiable, they no cap or release mechanism. temp is usually 165 for sprinkler systems.

52
Q

Mounting positions for sprinklers

A
  1. Pendant sprinkler heads- designed to be mounted on the underside of the sprinkler piping hanging down.
  2. Upright sprinkler heads- designed to be mounted on tope of the supply piping
  3. Side wall- horizontal mounting projecting out from a wall.
53
Q

Valves

A
  1. OS&Y

2. PIV

54
Q

OS&Y

A

has a stem that moves in and out as the valve is opened or closed. mostly inside Found outside in warmer climates

55
Q

PIV

A

reads OPEN or CLOSED (SHUT) found outside

56
Q

Tamper switches

A

these devices monitor the position of the valve. sends signal to fire alarm control panel

57
Q

water sources

A
  1. municipal

2. FD supported

58
Q

FDC (fire department connections)

A

two or more 2 1/2 inch female couplings allows FD to connect and provide water.

59
Q

Types of automatic sprinkler systems

A
  1. wet sprinkler systems
  2. dry sprinkler systems
  3. preaction sprinkler systems
  4. deluge sprinkler systems
60
Q

Wet sprinkler systems

A

most common and least expensive type. always filled with water. cant be used in below freezing and can cause leaks

61
Q

Dry sprinkler systems

A

pipes are filled with pressurized air instead of water.

62
Q

Accelerator

A

installed at the dry pipe valve when pressure drops it is activated

63
Q

Pre action sprinkler system

A

a secondary device such as a smoke detector or a manual pull alarm must be activated before water is released into the sprinkler piping.

64
Q

deluge sprinkler system

A

is a type of dry sprinkler system in which water flows from all of the sprinkler heads as soon as the system is activated.

65
Q

Shutting down sprinkler systems

A

systems are shut down by IC after fire extinguishers.

66
Q

Standpipe system

A

Class1, class 2, class 3

67
Q

Class !

A

designed for FD personnel only

68
Q

Class 2

A

is designed for use by the building occupants. 1 1/2 single jacket hose pre connected to the system

69
Q

Class 3

A

features both class 1 and 2 in a single system.

70
Q

Specialized ext. systems Dry chemical

A

kept in self pressurized tanks or in tank with an external cartridge of carbon dioxide or nitrogen that provides pressure when the system is activated.

71
Q

Wet Chemical

A

used in most new commercial kitchens

72
Q

Clean Agent

A

Halon and CO2 give pre alarm 30-60 sec.

Week 8 Block Test 9 (3 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions