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Lt. Study Material > Essentials Ch 20 > Flashcards

Essentials Ch 20 Flashcards

1
Q

What are the components that make up a typical alarm system (4 items)?

A 
FACP
Power supplies
Initiating devices
Notification appliances
Pg 1178
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2
Q

Notification appliances fall under the four categories which can be used in any combination:

A

Audible (most common) -horns, bells or speakers
Visual - approved lighting devices as strobes/flashing lights
Textual - visual text or symbols indicating a fire/emergency
Tactile - indication of a fire or emergency condition through sense of touch or vibration
Pg 1180

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3
Q

Initiating devices may be _______ operated or ________.

A

Manually (pull stations) or automatic (smoke detectors)

Pg 1180

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4
Q

A protected premises system is also called:

A

Local alarm system notifying building occupants only.

Pg 1182

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5
Q

Three basic types of local alarm systems:

A

Noncoded- any alarm initiating device sets off the alarm with no way of identifying the area
Zoned/annunciated- a general location of zone is identified
Addressable- panel displays the location of each initiating device
Pg 1182

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6
Q

A _____ _____ alarm system continuously monitors a remote location for the purpose of reporting a supervisory, trouble, or alarm signal to the appropriate authorities.

A

Supervising station -predominant types of signal-monitoring systems in the US
Pg 1183

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7
Q

Types of supervising station systems include:

A 
Auxiliary alarm systems
Proprietary systems
Central station systems
Remote receiving systems
Pg 1183
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8
Q

Automatic initiating devices are designed to detect ______, ______, _____ _____, _______, or a combination of these.

A

Heat, smoke, fire gases, flame

Pg 1184

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9
Q

What are colors used for manual pull stations?

A

Required to be red with white lettering that specifies what the device is and how to use it.
Pg 1185

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10
Q

Heat detectors activate when the ________ in a monitored area reaches a _______ threshold. They all operate on two different principles:

A

Temperature / predetermined / fixed-temperature and rate of rise
Pg 1185

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11
Q

What type of heat detector is least prone to fail, yet may also be the slowest to activate?

A

Fixed temperature heat detector
Common living spaces are set to 165º, where attic spaces and other areas subjected to elevated temperatures are rated at 200º
Pg 1186

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12
Q

Fixed temperature heat detectors activate by one or more of three mechanisms:

A

Expansion of heated material
Melting of heated material
Changes in resistance of heated material
Pg 1186

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13
Q

There are 4 different designs for fixed temperature heat detectors:

A

Fusible devices- fusible link or metal strip held in place by solder
Frangible bulbs - air bubble in liquid when heated expands
Continuous line detector - uses a wire which responds to heat
Bimetallic detector - uses two metals that have different thermal expansion characteristics
Pg 1187

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14
Q

______ ___ ____ ____ detectors operate on the assumption that the temperature in a room will increase faster from a fire than from normal atmospheric heating.

A

Rate of rise heat detectors

Pg 1188

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15
Q

Typically, rate of rise heat detectors are designed to initiate a signal when the rise in temperature exceeds:

A

12º - 15º F in one minute

Pg 1188

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16
Q

4 types of rate of rise heat detectors are:

A 
Pneumatic rate of rise line heat detector
Pneumatic rate of rise spot detector
Rate compensated detector
Electronic spot type heat detector
Pg 1189
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17
Q

______ ____ ____ _____ ______ detectors are used to monitor large areas of a building. These detectors consist of a system of tubing arranged over a wide area of coverage. Limited to about 1000 ft in length and should be arranged in rows that are not more than 30 ft apart.

A

Pneumatic rate of rise line heat detector

Pg 1189

18
Q

______ ___ ___ ___ _____ detectors are self contained in one unit that monitors a specific location with tubing.

A

Pneumatic rate of rise spot detector

Pg 1189

19
Q

This detector is designed for use in areas normally subject to regular temperature changes that are slower than those under fire conditions; consisting of an outer metallic sleeve that encases two bowed struts with electrical contacts when heated expand and touch.

A

Rate-compensated detector - fairly slow such as 5º - 6º per minute
Pg 1189

20
Q

This type of heat detector consistent of one or more temperature sensitive wires called thermistors that produce a marked change electrical resistance when exposed to heat. These can be calibrated to operate as rate of rise detectors and also function as fixed temperature.

A

Electronic spot type heat dectector

Pg 1190

21
Q

What type of alarm initiating device detect the presence of smoke or other products of combustion?

A

Smoke detectors and smoke alarms

Pg 1190

22
Q

Smoke detectors have two basic types:

A

Photoelectric and ionization types

Pg 1190

23
Q

A ______ _____ detector consists of a photoelectric cell coupled with a specific light source - functions in two ways: projected beam application (obscuration) or refractory application (scattered).

A

Photoelectric smoke detector

Pg 1190

24
Q

This type of smoke detector uses a tiny amount of radioactive material to ionize air molecules.

A

Ionization smoke detectors

Pg 1191

25
Q

_______ _____ detectors generally respond faster to flaming fires than to smoldering ones.

A

Ionizing smoke detectors

Pg 1192

26
Q

______ _____ detectors will initiate an alarm signal faster than a heat detector but not as quickly as a smoke detector.

A

Fire-gas detector

Pg 1194

27
Q

NFPA standard for sprinkler design and installation:

A

NFPA 13, standard for the installation of sprinkler systems

Pg 1195

28
Q

______ ______ ______ are recognized as the most reliable of all fire protection devices

A

Automatic sprinkler systems

Pg 1195

29
Q

Sprinklers are commonly rated according to the temperature at which they are designed to operate. This temperature is usually identified in one of three ways:

A

Color coding the sprinkler frame arms
Color coding the liquid in frangible bulb-type sprinklers
Stamping the temperature into the sprinkler itself
Pg 1197

30
Q

Three of the most commonly used release mechanisms to activate sprinklers are:

A

Fusible links
Frangible bulbs
Chemical Pellets
Pg 1195

31
Q

FDCs for sprinklers usually consist of a ______ _____ with at least two _____ ______ connections with a ______ valve in each connection.

A

Siamese inlet / 2 1/2” female / clapper

Pg 1202

32
Q

Types of sprinkler systems:

A 
Wet-pipe
Dry-pipe
Deluge
Pre action
Special extinguishing systems
Residential
Pg 1203
33
Q

Wet pipe systems are used in locations where temperatures remain above:

A

40ºF

Pg 1204

34
Q

What is the valve called that is used to catch excess water that is sent through the alarm valve during momentary water pressure surges?

A

Retard chamber

Pg 1204

35
Q

A ____ ____ valve has larger surface area on the air side of the clapper valve than on the water side.

A 
Dry pipe (dry system)
Pg 1204
36
Q

The required air pressure for dry systems is usually about:

A

20 psi

Pg 1205

37
Q

A fire suppression system consisting of piping and open sprinklers:

A

Deluge system

Pg 1205

38
Q

_____ ______ system operates with closed sprinkler heads and must release when a secondary detection system is tripped.

A

Preaction sprinkler system

Pg 1207

39
Q

_______ systems are designed to prevent flashover in the room of fire origin and improve the chance for the occupants to escape or be evacuated.

A

Residential

Pg 1208

40
Q

What are the classes of standpipes:

A

Class I - system provides 2 1/2” connections
Class II - system with 1 1/2” hose and nozzle
Class III - system that combines both Class I and II
Pg 1210-1211

41
Q

______ _____ refers to any effort to change the pressure in spaces adjacent to the fire area to compartmentilize or exhaust smoke from the area of the fire’s origin.

A

Smoke-control

Pg 1213

42
Q

A system designed to protect structure and minimize loss due to fire.

A

Fire protection system

Pg 1178

Lt. Study Material (45 decks)

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