10 Special Agent Extinguishing Systems Flashcards
1
Q
For a special. Agent system to be considered effective or successful it must do what
A
Completely extinguish the fire
2
Q
Different types of special agent systems
A
Dry chem Wet chem Clean agent Co2 Foam
3
Q
Class of fire normally involving commercial kitchens, deep fryers and food prep areas where oil and grease can ignite
A
Class k
4
Q
The method class k extinguishers work, agent turns fats and oils into a soapy form that extinguishes fire
A
Saponification
5
Q
When is a dry chem system used
A
Whenever rapid extinguishment is required and reigniting is unlikely
6
Q
Dry chem systems are commonly found where
A
Flammable liquid storage areas Dip tanks Paint spray booths Commercial cooking areas Kitchens Exhaust ducts
7
Q
Dry chem system consisting of storage tanks expellant storage tanks heat detection and activating system, piping and nozzles
A
Fixed system
8
Q
Two types of fixed system
A
Local application
Total flooding
9
Q
Type of fixed dry chem system that discharges agent onto specific surface like cooking area. Most common type
A
Local application
10
Q
Type of fixed dry chem system that introduces a thick concentration of agent into a closed area like a spray booth
A
Total flooding
11
Q
Dry Chen system is not recommended for what type of area
A
Sensitive electrical equipment, because of the mess
12
Q
Aka ordinary dry chem, effective against class b and c fires
A
Sodium bicarbonate
13
Q
When evaluated against an equal weight of co2, sodium bicarbonate is how many times more effective on class b fires
A
Twice
14
Q
Sodium bicarbonate in systems is treated to be water repellant and
A
Free flowing
15
Q
Aka multipurpose dry chem (pale yellow in color) effective on class a,b,c fires
A
Monoammonium phosphate
16
Q
How does monoammonium phosphate behave on class a fires
A
It melts forming a solid coating to smother fire
17
Q
Dry powders are designed for what type of fire
A
Class d
18
Q
True false no single agent is effective against all combustible metals
A
True
19
Q
Sodium bicarbonate based Sargent with additives to enhance flow. Designed specifically for sodium, potassium, and sodium potassium alloy fires
A
Na-x
20
Q
Na-x forms a cake like crust on the metal and is rated up to what temp
A
1400f
21
Q
Sodium chloride (salt) based agent intended for use on magnesium, sodium and potassium fires and is applied slowers to bury the materials involved
A
Met-L-x
22
Q
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
A
LITH-x
23
Q
Any number of inert gasses compressed to force extinguishing agents from an extinguisher, nitrogen is most common
A
Expellant gas
24
Q
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
A
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
