9 Water-Based Fire Suppression Systems Flashcards Preview

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Flashcards in 9 Water-Based Fire Suppression Systems Deck (169):
1

Types of water based fire suppression systems

Automatic sprinkler systems
Waterspray fixed systems
Water mist systems
Foam water systems
Standpipe and hose systems
Fire pumps

2

What systems are designed to control contain or extinguish fires in the incipient stage

Automatic sprinklers.
Waterspray.
Watermist.
Foam water

3

Of the fires inside of sprinklered buildings what percentage were controlled or extinguished by the system

94%

4

Most fires and sprinklered structures are controlled by how many sprinkler heads

Five or fewer

5

Fire deaths in one and two family dwellings can be reduced by up to what % with the installation of sprinkler is

82%

6

Four types of sprinkler systems

Wet pipe.
Dry pipe.
Deluge.
Pre-action

7

Open sprinklers attached to unpressurized dry pipes. System activated when detection device senses fire and opens water flow control valve all sprinklers discharge water simultaneously

Deluge sprinkler system

8

Continually charge with air that may or may not be pressurized. System only operates on both sprinkler opens and detection device in seeing area activate water flow control valve

Pre-action sprinkler system

9

What pipe system continually charge with antifreeze solution

Anti-freeze sprinkler system

10

Wet pipe system that uses sprinkler system to circulate water for non-fire protected building services

Circulating close loop system

11

System where detection device activate water flow control valve, releases pressurized air system, and waters discharged when head opens

Combined dry pipe and pre-action system

12

System of parallel cross mains connected together by multiple branch lines. any activated sprinkler will receive water from both means. Advantage of water flow from multiple directions

Gridded sprinkler system

13

System of interconnected cross mains that provide multiple routes for water to reach any point. Branches are not connected

Looped sprinkler system

14

System to operate repeatedly in response to detection device. Turn on and off based on demand of device

Multi cycle sprinkler system.

15

Protection systems are generally divided into two broad categories

Systems that detect hazardous conditions
Systems that control hazardous conditions

16

Every automatic sprinkler system must have a water supply of adequate

Volume pressure and reliability

17

What determines the minimum waterflow the sprinkler system

The hazard being protected, occupancy classification, fuel loading

18

Water flow control valves for sprinkler services must be what type

Indicating type

19

What type of valve is a post-indicator valve

Gate valve

20

Similar to a PIV except that it extends horizontally through the wall with the valve operating not on the outside of the building

Wall post-indicator valve WPIV

21

Post-indicator valve assembly PIVA

Similar to PIV except it uses a butterfly valve

22

Valve has a hollow metal post attached to the valve housing inside the valve stem there a target words that say open or shot

Post-indicator valve PIV

23

This valve is located on the riser and used to flow water for the purpose of testing the waterflow alarm sprinkler system may be located in a remote part of the piping

Alarm test valves

24

This is used to limit the flow of water to One Direction placed in the water supply line

Check valve

25

Designed as a small hand wheel type of valve that usually turns counterclockwise to open and clockwise to close. Inspector test valve

Globe valve

26

Used for drains an alarm testing sometimes known as stop or cock valve most commonly open or close with quarter turn

Ball drip valves

27

Sprinkler systems start with what

Underground water supply main

28

Vertical sections of pipe that connects the underground supply to the rest of the piping system

System risers

29

Risers supply what type of pipe that directly serve a number of branch lines

Crossmain

30

Sprinkler heads are installed on the branch lines with short vertical sections of pipe called

Nipple risers

31

Traditional method for designing sprinkler systems that designates maximum number of sprinklers a given size of pipe can supply limited to light and ordinary hazards

Pipe schedule table

32

Method for arranging pipes that his computer design based on the type of occupancy and hazard. Most accurate method and cost-effective design

Hydraulic calculations

33

Type of sprinkler head designed to suppress fires in high challenge hazards such as warehouses. Developed as a result of research into residential type sprinklers that must react rapidly to protect life in the room of origin

Early suppression fast response

34

Sprinkler head designed to cover an area of 20 x 20'

Extended coverage

35

Sprinkler head designed to produce large water droplets

Large drop

36

Sprinkler head designed to direct 40-60% of its discharge in a downward direction. And it may be altered to be an upright position with deflector flipped

Old-style or conventional

37

Sprinkler head designed with an open orifice

Open

38

Sprinkler head designed to provide increased life safety and hotels motels in similar residential occupancies

Quick response early suppression

39

Sprinkler head designed to provide increased life safety and hotels motels with a larger coverage area than QRES

Quick response extended coverage

40

Design for fast response and residential occupancies were life safety in the room of origin his primary concern

Residential, RES

41

Sprinkler head designed to protect special hazards

Special

42

Sprinkler head designed for use in storage areas under minimum operating pressure

Specific application control mode

43

Sprinkler head designed for use in general types of occupancies replaced old style or conventional and maybe this is a bright or pendant and take longer to activate than residential or quick response

Standard spray, SS

44

Sprinkler head designed for use in situations that require a special water discharge pattern

Nozzle

45

Sprinkler head designed specifically for use in high rack storage spaces

Intermediate level or rack storage

46

Sprinkler head installed downward from the branchline

Pendant

47

Most common type of sprinkler release mechanisms

Fusible links
glass bulbs
chemical pallets

48

Sprinklers are rated by their activation temperatures which may be stamped

On the sprinkler

49

Activates based on the maximum temperature expected at the level of the sprinkler under normal conditions

Specific application sprinkler

50

Activates pre-action and a dry pipe systems by smoke Heat rate of rise in protected area

Electronic Heat detector

51

Device measuring temperature in which to electrical conductors of dissimilar metals such as copper and iron are joined at the point where Heat is applied

Thermocouple

52

And what type of sprinkler system will sprinklers discharge water when the sprinkler thermocouple activates

Pre-action system

53

Residential sprinklers require how many minutes of supply water

10 minutes

54

If the residential structure is less than 2000 ft.² and no more than one story and height what is the required flowrate

Two sprinklers times seven minutes of operation

55

For residential structures such as hotels and motels what is the minimum required water supply for sprinklers

30 minutes supply

56

Minimum waterflow and gallons per minute for individual sprinkler in residential

18 gallons per minute

57

Major difference between residential sprinklers and standard sprinklers

Sensitivity or speed of operation residentials operate faster

58

In one into family dwellings sprinklers can be omitted from the following areas

Bathrooms less than 55 ft.².
Small closets less than 24 ft.².
Garages.
Porches.
Carports.
Uninhabited attics.
Entrance hallways

59

Spacing for sprinklers and residential systems is a maximum of how many square feet

144 ft.² per sprinkler

60

Maximum space in between sprinklers and residential is how many feet apart

12 feet apart

61

Maximum allowable distance of the residential sprinkler from the wall is

6 feet

62

Some residential sprinklers can be spaced to protect and area as large as

20 x 20'

63

The sprinkler spacing of 20 x 20' the minimum discharge pressure is increased to

32.5 GPM for one head and 22.5 GPM per sprinkler for two operating

64

Residential sprinklers are different from standard sprinklers and that they are designed to discharge water how

Higher up in the room

65

Minimum pipe size to be used in a residential sprinkler system

Half inch

66

Minimum GPM for water supply for residential sprinklers

18 GPM for single sprinkler. 13 GPM for two or more sprinklers

67

Waterspray fixed fire suppression systems are similar to but

Not considered an automatic sprinkler system.

68

Waterspray fixed systems are used generally for specific or general hazards such as

flammable gas and liquid materials
Electrical equipment
Class a
Hazardous solids
exposure protection

69

For site with an explosion hazard what type of system might be used

Ultra high-speed Waterspray fixed system

70

A Watermist system is similar to a Waterspray fixed system except

It discharges a fine mist of water that absorbs larger quantities of heat

71

Water missed systems raise the humidity in the room high enough to hold

The combustion process

72

Water missed systems are currently used to protect the following types of hazards

Gas jet fires.
Computer equipment and rooms.
Flammable and combustible liquids.
Hazardous solids.
Plastic fun furnishings.
Aircraft passenger cabins.
Ordinary class a.

73

The basic pressure ranges a water most system operates

Low pressure
Intermediate
High

74

Psi of a low pressure mist system

175 psi

75

Psi of an intermediate mist system

175-500 psi

76

Psi of a high pressure mist system

500+ psi

77

Water mist systems work similarly to a deluge system in that

The nozzles are open and require two or more initiating devices to activate system

78

Water supply should. Last at minimum how long for water mist

30 min

79

Foam water system is. A hybrid of

Automatic sprinkler and foam extinguishing

80

Foam water system is basically what type of system with foam introduced into it through educator and aerating nozzles

Deluge

81

Foam water may stem foam expands how many times

6-8

82

Foam system contains the following components

Foam concentrate
Pump
Metering valve
Strainer
System piping
Actuation unit

83

Class I standpipes are for use by who

Firefighters

84

Class I standpipes are threaded with

2.5" and possible reduced to 1.5"

85

Class I standpipes are for use by whom

Trained building occupants

86

Class I standpipes hose systems are composed of

1.5" thread, hose nozzle.

87

Class iii standpipes hose systems are what type

Combination of I and ii. Have both 1.5" hose and thread and a 2,5" coupling

88

Standpipes system contains water in system. Pressure constantly maintained when water supply control valve is opened

Automatic wet standpipe system

89

Standpipe system that contains air under pressure. Water sent to station once valve is opened or switch is activated.

Automatic dry standpipe

90

Standpipe system that contains unpressurized air and admits water automatically through use of dry pipe Valve when hose valve is opened

Semiautomatic dry standpipe

91

Standpipe system that contains unpressurized air and has not permanent water supply. Needs to be fed by FDC

Manual dry

92

Standpipe system that maintains water from domestic system to detect leaks but no permanent source and needs FDC connection

Manual wet standpipe system

93

Most desirable type of standpipe systems

Automatic wet with auto water supply.

94

Water supply for class I and ii standpipe systems bust provide what flow

500 gpm for at least 30 min with residual pressure of 100 psi at most remote 2.5 outlet.

95

What residual pressure is required for the most remote 1.5" standpipe outlet

65 psi

96

If more than one standpipe riser and connection is needed the water supply must provide how many gpm per outlet

250 gpm for reach additional riser with a max of 2500 gpm

97

Horizontal standpipe systems that supply three or more class I and iii stations requires a minimum flow rate of

750 gpm

98

For a class ii horizontal system what flow must be provided for the standpipe system at the highest outlet

100 gpm, for 30 min with residual pressure of 64 psi

99

Water supply for standpipes in highrises are generally from

Fire pumps

100

For class I and III systems in a highrise less than 100', the minimum riser diameter is

4"

101

Class I and iii standpipe system riser size in highrises over 100'

6",
4" for top 100'

102

Class ii standpipe riser size under 50feet

2"

103

Class ii riser size over 50'

2.5"

104

Class ii riser requirements over 275' high

Must be divided into sections

105

Buildings with combine sprinkler and standpipe riser minimum size is

6"

106

Stand Pips should be placed so that no part of the floor is how far from a connection

130'

107

Actual Jose connections of standpipes can be located no further than what from any floor level

6'

108

True false class I and iii systems may require a standpipe 2.5" outlet on the roof

True

109

Standpipe Roof connections are required in what circumstances

Combustible roof
Combustible structure or equipment on roof
Exposures that present hazard

110

If standpipe discharge pressure exceeds 100 psi at the outlet, what is required

Pressure relating device.

111

Pressure regulating device that consists of simple constricting orifice in waterway

Pressure restricting device

112

Pressure restricting devices are limited to what circumstances

1.5" systems and 175 max pressure

113

Pressure control devices

Preferred method for controlling standpipe pressure. Gauge to read pressure may or may not be adjustable

114

Pressure reducing devices

Preferred for managing excessive pressure, spring and plunger.

115

Pressure regulating devices for standpipes are notorious for

Failures

116

Highrises with two or more standpipes zones require how many FDC

One for each zone

117

Height beyond effective fire engine pumping capacity for standpipes

450'

118

Main purpose of a fire pump is to

Increase pressure of water flowing through it

119

Small capacity high pressure pump used to maintain constant pressure on the fire protection system

Jockey pump

120

5 types of centrifugal fire pumps

Horizontal split case
Vertical split case
Vertical inline
Vertical turbine
End suction

121

Most common type of fire pump found in stationary fire suppression systems

Horizontal split case

122

Horizontal split case is aka

Horizontal shaft pump

123

Pressure exerted at the bottom by a stationary column of water directly proportional to the height

Head pressure

124

Horizontal split case pumps pressurize incoming municipal water and is not self priming. Therefore

It cannot draft from a static source.

125

Mot common gallons rating for horizontal split case pump

500-1500 gpm

126

Horizontal split case pumps are not specifically rated for psi like engine pumps and are available as low and high as

40 psi to 290 psi

127

Fire pump similar to horizontal except shaft is runs vertically

Vertical split Case

128

Single stage pump designed to fit into an intake, discharge line with drive above the impeller

Vertical Inline

129

Vertical inline pump is rated up to what gpm and psi

1500 gpm and 165 psi

130

Vertical turbine pumps are very useful for

Lifting water from source below pump , up to 500 psi

131

End suction pump is similar to split shaft horizontal except

They have centerline suction and discharge

132

End suction pumps are rated at what psi and gpm

40-150 psi and 50-750 gpm

133

Source of p,owner that operates fire pump

Driver

134

Most common method for driving fire pump

Electric motor driver

135

1000 gpm pump at 100 psi would require what hp motor

80 hp

136

Diesel pump drivers need to be tested how often

Weekly for 30 min

137

Fire pumps start when they detect

A drop in system pressure

138

Temp rating for Uncolored or black ordinary sprinkler

135-170

139

Temp rating for blue high sprinkler

250-300

140

Temp rating for white intermediate sprinkler

175-225

141

Temp rating for red extra high sprinkler

325-375

142

Temp rating for green very extra high sprinkler

400-475

143

Temp rating for orange ultra high sprinkler

500-575

144

During preacceptance inspections inspectors should particularly take notice to

Pipe hangers

145

Acceptance tests are performed on all water based systems when

Installation is complete and done by contractor.

146

Auto sprinkler should be inspected when

During any normal scheduled inspection

147

Inspections for water base suppression systems typically start where

In the riser room

148

When inspecting a piv, what should be ensured

Bolts are tight, wrench in place and barrel casing intact

149

On a water flow control valve inspectors should look for the following conditions

Alarm line shutoff valve is completely open
Valves to pressure gauges are open

150

Static pressure above the clapper valve should be equal to or greater than

Static pressure below clapper

151

Main drain aux drains and inspector drains should be in what position

Closed

152

In dry systems the sprinkler riser room needs to be at least what temp

40 degrees f

153

In a wet system, the areas where pipes are need to be at least what temp

40 degrees f

154

What size in the main drain for risers 4" and up

2"

155

System air pressure in dry systems should be between what psi

15-20 psi

156

Inspectors only witness the sprinkler test they do not perform it on automatic systems because of the

Liability

157

What extra sprinklers heads are required on hand along with a wrench

One of each temp rating

158

Creeping or sliding of fusible link, indication of weak sprinkler, is called

Cold flow

159

Cold flow is eliminated by

Using higher temp sprinkler or frangible bulb

160

Obstructions from sprinkler heads, depending on type, should be how far from the head

18-36"

161

For a water spray fixed system, inspectors should ensure a response time of less than

40 seconds

162

For ultra high speed water spray fixed systems, the reaction time should be less than

100 milliseconds

163

Empty air cylinders for water most should be hydro tested how often

5 years

164

In discharged air cylinders in water most systems should be emptied and tested every

12 years

165

Dry pipe standpipe systems should be hydro tested how often

Every 5 years

166

Stationary fire pumps should be tested and inspected how often

Weekly

167

Private water main supplies are flow tested

Every 5 years

168

Hydrants should be tested by opening the cap and flowing water for no less than

1 min

169

Dry barrel hydrants should completely drain in how long

No more than 1 hour