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Flashcards in 10 Special Agent Extinguishing Systems Deck (139):
1

For a special. Agent system to be considered effective or successful it must do what

Completely extinguish the fire

2

Different types of special agent systems

Dry chem
Wet chem
Clean agent
Co2
Foam

3

Class of fire normally involving commercial kitchens, deep fryers and food prep areas where oil and grease can ignite

Class k

4

The method class k extinguishers work, agent turns fats and oils into a soapy form that extinguishes fire

Saponification

5

When is a dry chem system used

Whenever rapid extinguishment is required and reigniting is unlikely

6

Dry chem systems are commonly found where

Flammable liquid storage areas
Dip tanks
Paint spray booths
Commercial cooking areas
Kitchens
Exhaust ducts

7

Dry chem system consisting of storage tanks expellant storage tanks heat detection and activating system, piping and nozzles

Fixed system

8

Two types of fixed system

Local application
Total flooding

9

Type of fixed dry chem system that discharges agent onto specific surface like cooking area. Most common type

Local application

10

Type of fixed dry chem system that introduces a thick concentration of agent into a closed area like a spray booth

Total flooding

11

Dry Chen system is not recommended for what type of area

Sensitive electrical equipment, because of the mess

12

Aka ordinary dry chem, effective against class b and c fires

Sodium bicarbonate

13

When evaluated against an equal weight of co2, sodium bicarbonate is how many times more effective on class b fires

Twice

14

Sodium bicarbonate in systems is treated to be water repellant and

Free flowing

15

Aka multipurpose dry chem (pale yellow in color) effective on class a,b,c fires

Monoammonium phosphate

16

How does monoammonium phosphate behave on class a fires

It melts forming a solid coating to smother fire

17

Dry powders are designed for what type of fire

Class d

18

True false no single agent is effective against all combustible metals

True

19

Sodium bicarbonate based Sargent with additives to enhance flow. Designed specifically for sodium, potassium, and sodium potassium alloy fires

Na-x

20

Na-x forms a cake like crust on the metal and is rated up to what temp

1400f

21

Sodium chloride (salt) based agent intended for use on magnesium, sodium and potassium fires and is applied slowers to bury the materials involved

Met-L-x

22

Graphite based agent that extinguishes fires by conducting out heat away from fuel. Developed for lithium but also effective against sodium magnesium and zirconium, does not form a crust

LITH-x

23

Any number of inert gasses compressed to force extinguishing agents from an extinguisher, nitrogen is most common

Expellant gas

24

Dry Chen system component that may contain both the agent and expellant gas or either. Commonly nitrogen or co2, storage ranging from 30-100 lbs

Storage container for expellant gas and or agent

25

Critical feature and limitation of special agent systems

Quantity of agent in the system

26

Of a system is controlled by a fusible link, the link should be replaced how often

At least annually or by manufacturer recommendations

27

Dry Chen storage containers that are less and 150 lbs should be hydro tested how often

Every 12 years

28

True false. Dry chem storage cylinders larger than 159 lbs have no hydrostatic testing requirements

True

29

What type of extinguishing systems is best suited for applications in commercial cooking hoods, plenums, ducts and associated cooking appliances

Wet chem

30

Wet chem systems are most effective on fires in

Deep fryers

31

Primary difference between dry and wet chem

Type of agent used.

32

Wet chem agents are typically composed of water and either

Potassium carbonate, potassium citrate or potassium acetate.
Potassium is abbreviated as K. CLASS K FIRES

33

Inspection and testing of systems should include

All parts in right location
All actuators unobstructed
tamper indicators intact
Maintenance tags up to date

34

Clean agents will conduct electricity true false

False they won't conduct

35

Clean agents are used for what classes of fire

Class a b c

36

Clean agents are stored as liquids and turn to gas when exposed to

The air

37

Clean agents are used in what type of rooms

Mri
Archives
Art galleries
Aircraft engines
Irreplaceable documents or storage items
sensitive electronics

38

Clean agents leave no residue and work by

Cooling, smothering fire and displacing oxygen

39

Halogenated agents contain atoms from halogen elements such as

Fluorine chlorine bromine and iodine

40

Halogenated agents are effective against what classes of fire

B and c

41

Halon agents haven't been manufactured since 1994 except

In certain exclusions to the Montreal protocol of 1987

42

Two types of halon still in use

Halon 1211
Halon 1301

43

Halon 1211 is most commonly found in what

Portable extinguishers

44

Halo carbon agents that are available commercially now

Hydrochlorofluorocarbon hcfc
Hydrofluorocarbon hfc

45

Halocarbon agents that rapidly evaporates when released. Limited class a rating in exit guises over 9 lbs

Halotron

46

A 28 lb Halotron extinguisher is given a rating of

2a:10bc

47

Acceptable replacement for halon 1301 but requires more

Fm200

48

Blend of three inert gasses, nitrogen ,argon and co2

Inergen

49

Hydrofluorocarbon based agent that is non conductive non corrosive and residue free and zero ozone hazard. Human exposure for 5 min

Ecaro 25

50

Halon agent developed by DuPont to replace 1301 and 1211. Made of HFC-236fa

FE-36

51

Clean agent systems must be tested how often by qualified personnel

Annually

52

Contents and pressure of clean agents need to be inspected how often

Semiannually

53

Clean agent systems need to be hydro tested every

5 years

54

Co2 is how cold

-110 f

55

Most serious problem involving co2 systems is

Personal safety

56

Total flooding system of co2 is designed to deliver what percent of co2 in an enclosed area. Meaning the atmosphere will be what percent co2 after discharge

34%

57

Total flooding systems must be equipped with what type of alarm

Pre discharge alarm

58

Three means of co2 system actuation

Automatic operation
Normal manual
Emergency manual

59

Automatic operation of co2 system

Triggered by product of combustion detector

60

Normal manual operation co2 system

Triggers by person manually operating control device

61

Emergency manual operation co2 system

Discharge immediately without advanced warning to area

62

High pressure co2 tanks are at what psi

850 psi

63

Low pressure co2 tanks are designed to protect large hazards. Liquefied co2 is stored in large tanks refrigerated and stored at what temp and pressure

Temp 0F and 300 psi

64

What type of co2 nozzle promotes better distribution of material

High pressure

65

A foam extinguishing system is used when water alone may not be sufficient. Examples of locations are

Aircraft hangars
Flammable liquid storage
Paper and textiles storage

66

Foam systems extinguish using any of the four following methods

Smothering
Separating
Cooling
Suppressing

67

Foam extinguishment by suppressing is

Preventing the release of flammable vapors

68

Foam extinguishing method by separating is

Intervenes between fuel and fire

69

Type of foam system that is pipes from a central foam station and automatically discharges from through delivery outlets

Fixed system

70

Most fixed foam systems have unlimited water supplies and are of what type of function

Deluge

71

Prepped system for foam where there is no permanent source attached. Requires interventions form brigade or department. Commonly found at oil refineries

Semi fixed type a system

72

When surface application of foam may not be effective, foam injected at the base of a burning storage tank is what type of foam system

Subsurface injection system

73

Foam solution is delivered through pipes to a hydrant, throughout facility, for use with hose lines. Permanently attached foam source but doesn't apply foam to fire

Semi fixed type b

74

Total flooding type of foam system that is either automatic or manual. Foam is generated by motors or water pressure. Aircraft hangars and shipboard engine rooms

High expansion foam system

75

Basically a deluge sprinkler system with foam introduced with limited foam concentrate available. Continues as water once foam runs out.

Foam-water system.

76

Raw foam liquid before introduction on water. Usually 5 or 55 gallon.

Foam concentrate.

77

Device that introduces correct amount of concentrate into water to make foam solution

Foam proportioner.

78

Homogenous mixture of foam concentrate and water before air introduction

Foam solution

79

Completed product once air is introduced into solution

Foam, aka finished foam.

80

Four elements to make high quality foam

Concentrate, water, air, mechanical agitation

81

Class b foam is used at what concentrations

1,3 and 6 percent.

82

Hydrocarbon fires require what foam concentrations

1-6 percent

83

Polar solvent fuels, like alcohols, require what percent foam

3-6 percent

84

Medium and high expansion foams are used at what percent

1, 1.5, 2, or 3 percent.

85

Finished foam is what percent water

94-99.5%

86

Type of foam expansion for liquid fuels and vapor suppression, for liquid fuel temp not exceeding 212F

Low expansion

87

Low expansion fuel has an air solution ratio of

7:1 to 20:1

88

Type of foam expansion when rapid vapor suppression is needed

Medium expansion

89

Medium expansion foam expansion ratios

20:1 to 200:1

90

Foam expansion type for space filling in hard to reach areas and total flooding.

High expansion foam

91

High expansion foam expansion ratio

200:1-1000:1

92

Type of foam concentrate that is based on hydrolysis protein solids and fortified with fluoronated surfactants that enable the foam to shed or separate from hydrocarbons

Fluoroprotein foam

93

Foam concentrate type based on fluoroprotein foam and AFFF capabilities for fast extinguishment and long lasting effects

Film forming fluoroprotein FFFP

94

Foam concentrate with fluorinated surfactant added to detergent . Causes water to drain from foam blanket and float on top of hydrocarbon

Aqueous film forming foam AFFF

95

Foam with reduced surface tension that has good penetrating abilities, capable of being used in normal fog nozzle for low expansion

AFFF

96

Synthetic based foam that foams a membrane over polar solvent fuels, separating foam blanket from attack of solvent

AR-AFFF
Alcohol resistant aqueous film forming foam

97

Two types of AR-AFFF

One type is 1% for hydrocarbon and 3% for polar solvents
Other is 3% hydrocarbon and 6% polar

98

Foam concentrate type that has low moisture content and is suitable for pesticide fires and suppressing vapors of fuming acids.

Medium and high expansion foam

99

Type of foam proportioner that has a foam concentrate line connected to each fire pump discharge outlet or to the system riser providing equal pressure as the water from the fire pump

Balanced pressure proportioner

100

Advantages of balanced pressure proportioner

Ability to monitor demand and adjust
Ability to discharge foam from some outlets and water form others

101

Proportioner with small return line or bypass from discharge side of fire pump back to intake side of fire pump with an eductor

Around the pump proportioner

102

This type of proportioner is especially useful when ther is low water pressure or when a separate motor and concentrate pump is not available. Type built into fire apparatus

Around the pump proportioner

103

Disadvantages of a prune the pump proportioner

Pump dedicated solely to foam operation
Can't take advantage of incoming pressure, anything over 10 psi water inlet and concentrate won't enter pump

104

Proportion in system consisting of foam concentrate tanks connected to both water supply and foam solution lines in the system. Small amount of water pumped into concentrate tanks

Pressure proportioning system

105

Proportioner consists of two positive displacement rotary gear pumps mounted pt the same shaft. One for concentrate other for water.

Coupled water motor pump proportioner

106

Type of proportioner used in fixed systems. Limited to two sizes both at 6% foam.

Coupled water motor pump proportioner

107

Two types of gpm flow from coupled water motor pump proportioner

60-180 gpm
200-1000 gpm

108

What class extinguishers receive a number to indicate extinguishing capacity

Class a and b

109

Class a extinguishers are rated from 1a to

40a

110

Class b extinguishers are rated from 1b to

640 b

111

Class b extinguisher ratings are based on the approximate area in square feet of

2 inches of heptane in a 8 inch deep pan
A 10 b can extinguish 10 square feet

112

No numerical rating is Given to class c extinguishers, instead they are tested for

Electrical non conductivity

113

What is the rating given for class d extinguishers

There is no rating given, it Gary's based on extinguishing agent

114

In the pictorial system of extinguisher labeling, blue indicates the type of fire it can be used for. What indicates inability to use

Absent picture or blacked/ grey picture with red line through it

115

Letter symbol for class a extinguisher

Green triangle

116

Letter symbol for class b extinguisher

Red square

117

Letter symbol for class c extinguisher

Blue circle

118

Letter symbol for class d extinguishers

Yellow star

119

Letter symbol for class k extinguishers

Black hexagon

120

Maximum size of water can considered portable

5 gallon

121

Frequently used dry chem agents for portable extinguishers

Sodium bicarbonate
Potassium bicarbonate
Monoammonium phosphate (multi purpose)
Urea potassium bicarbonate
Potassium chloride

122

Type of extinguisher that contains expellant gas and extinguishing agent in a single chamber. Pressure forces agent thorough siphon tube

Stored pressure extinguisher

123

Type of extinguisher that expels agent by manual pump operating

Pump operated extinguisher

124

Occupancy in which the amount of ordinary combustibles present a small expected fire. School church assembly hall

Light hazard occupancy

125

Occupancy hazard in which amount of combustible would create incipient fire of moderate size. Parking garages, mercantile, light manufacturing

Ordinary hazard occupancy

126

Occupancy hazard where amount of combustibles present a rapidly spreading fire. Auto repair, paint shops, flammable liquid storage

Extra hazard occupancy

127

Fire extinguisher requirement for light hazard

2a per 3000 ft2

128

Fire extinguisher requirement for ordinary occupancy hazard

2a per 1500 ft2

129

Fire extinguisher requirement for extra hazard occupancy

4a per 1000 ft2

130

In all occupancies, the maximum travel distanced to a class a extinguishers is

75 ft

131

Determination point of class b spill for being "with" or "without depth"

Less than 1/4" is without
More than 1/4" is with depth

132

Maximum recommended travel distance to a class d extinguishers

75 ft

133

In areas where class k fires are likely the maximum travel distance to an extinguisher is

30 ft

134

Extinguishers less than 40 lbs should be how high off the ground.

Top of extinguisher not more than 5 ft above floor

135

Extinguishers greater than 40 lbs except wheeled types should be mounted how high above floor

Top of extinguisher No more than 3.5 ft above floor

136

Clarence from bottom of extinguishers to the floor should never be less than

4 inches

137

What types of antifreeze can't be used in stainless extinguisher bodies

Ethylene glycol and calcium chloride

138

Antifreeze cannot be added to what type of extinguisher

AFFF extinguishers

139

While monthly extinguisher inspections is the property owners responsibility, who's responsibility is it to verify this is taking place

Responsibility of jurisdiction fire inspector