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Keith's Cards > IFSTA(5th)-Chapter 6 > Flashcards

IFSTA(5th)-Chapter 6 Flashcards

(78 cards)

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0
Q

NFPA 10

A

Std. for Portable Fire Extinguishers

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1
Q

Portable Fire Extinguishers are designed to b used on _______ fires.

A

incipient or early growth

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2
Q

extinguishing agents work by at least one of the following mechanisms

A

smothering
cooling
interrupting the chemical reaction
saponification

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3
Q

NFPA 1901

A

Std. for Automotive Fire Apparatus

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4
Q

NFPA 1901 requires _____ approved port. fire extinguishers with ______ .

A

2

mounting brackets

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5
Q

NFPA 1901 requires at least a rating of ______ for a dry chemical extinguisher and a _______ rating for a CO2 extinguisher.

A

80 B:C

10 B:C

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6
Q

NFPA 1901 also requires one ______ water extinguisher for class A fires.

A

2.5 gallon or larger

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7
Q

Water Extinguishers r 4

A

class A fires

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8
Q

AFFF is for ____

A

class A or B fires

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9
Q

Halon 1211 and Halon 1301 r 4

A

class B or C fires

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10
Q

Clean Agent FE-36 is for _____

A

class A, B, or C fires

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11
Q

CO2 is used for _____

A

class B or C fires

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12
Q

Dry Chemical Extinguishers r 4 ___

A

class B or C fires

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13
Q

Multi-purpose dry chem. is for ___

A

class A, B, or C fires

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14
Q

Dry Powder is used for _____

A

class D fires

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15
Q

Wet Chemicals such as Potassium Acetate are used for _____ .

A

class K fires

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16
Q

4 different dry chemical agents

A

sodium bicarbonate
potassium bicarbonate
potassium chloride
ammonium phosphate

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17
Q

Multi-Purpose Dry Chem. agent

A

monoammonium phosphate

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18
Q

extinguishing agents primary method of extinguishment

A

water - cooling
CO2/Foam/Wet Chem/Dry Powder - O2 depletion
clean agent/dry chem - interrupts chemical reaction

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19
Q

3 expelling mechanisms

A

manual pump
stored pressure
pressure cartridge

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20
Q

Class A extinguishing agents

A

water
class A foam or AFFF
clean agents
dry chemical

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21
Q

Class B extinguishing agents

A 
CO2
class B foam (AFFF for example)
dry chemical
halon
clean agents
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22
Q

Class C extinguishing agents

A

dependent on what is burning. first, de-energize electrical source

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23
Q

Class D extinguishing agents

A

dry powders

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24
Class K extinguishing agents
wet chemicals
25
Conductivity
ability of a substance to conduct an electrical current.
26
Alloy
mixture of two or more metals (or a metal and a non-metal) that are fused/dissolved into each other to enhance the properties of the base metal.
27
APW extinguishers
air pressurized water extinguishers
28
Water Mist stored pressure extinguishers use ________ as the agent and produces a ______ instead of a solid stream. They are ______ to use on class C fires.
de-ionized water fine mist safe
29
AFFF
aqueous film-forming foam when combined with water it forms a complete vapor barrier over fuel spills and fires. highly effective on hydrocarbon fuels. ineffective on polar solvents (flammable liquids that r water-soluble). AKA "light water"
30
Air-Aspirating Foam Nozzle
designed to provide aeration to provide the highest quality foam
31
AFFF can be applied by
raining down | deflection
32
EPA
environmental protection agency
33
5 facts about "clean agents"
are discharged as a rapidly evaporating liquid that leaves no residue. are non-conductive so they can be used on class A, B, and C fires. pressurized with argon gas. approved by the EPA. are designed to specifically replace Halon 1211.
34
4 examples of clean agents
HCFC-hydrochloroflourocarbon HFC-hydrofluorocarbon PFC-perflourocarbon FIC-flouroidiocarbon
35
CO2 is stored under ______ as a liquified gas ready for release at any time.
it's own pressure
36
CO2 discharges at _____ temp.
subzero
37
2 reasons not to touch a CO2 horn during discharge
static electricity builds up | subzero temp.
38
Dry chemicals are mixed with _____ during manufacture to prevent caking.
small amounts of additives that make them resistant to moisture
39
Corrosive Materials
gas, liquid, or solid material that can burn, irritate, or destroy human skin and can severely corrode steel.
40
Cartridge-Operated extinguishers
employ a pressure cartridge that pressurizes the tank after a plunger is pushed.
41
2 types of cartridge-operated extinguishers
``` CO2 dry nitrogen(for freezing temps) ```
42
Wheeled dry chem extinguishers must have their _____ before the extinguisher is pressurized.
hoses deployed
43
Wheeled dry chem extinguishers have ______ nozzle reaction.
significant
44
Dry powder is applied _______
gently and in sufficient depth to create a smothering blanket.
45
What extinguishing agent when applied to class D fires causes a violent reaction, intensifies combustion, and causes bits of molten material to spatter?
water
46
performance capability
the # on an extinguisher
47
UL
underwriters laboratories inc.
48
Class A ratings
1A-40A | A=1.25gallons of water would b required
49
Class B ratings
``` 1B-640B B=1 square foot of a class B fire that a non- expert can extinguish. ```
50
For an extinguisher to be rated for Class C fires, the extinguishing agent must be _______ .
non-conductive
51
Extinguishers are classified for their _______ .
intended use
52
Wood cribs
water used to extinguish fires in these cribs determine class A ratings
53
Class D extinguishers are not given a _______ and _______ be used on any other class fire.
rating | cannot
54
2.25 square feet
minimum surface area of a cooking fire that must be extinguished to meet the minimum criteria for a class K rating.
55
Class of Fire Symbols
``` A=green triangle B=red square C=blue circle D=yellow star K=black hexagon ```
56
Extinguishers suited for______ are identified by combinations of letters and numbers.
more than 1 class of fire
57
8 factors to selecting the proper fire extinguisher
``` class of fire rating of extinguisher hazards to be protected size and intensity if fire atmospheric conditions life hazards/operational concerns ease of handling availability of trained personnel ```
58
Operate an extinguisher from _____ the fire and your exit.
between
59
4 checks of an extinguisher prior to immediate use
is it pressurized weight(is the agent inside?) hose/nozzle in place external condition
60
Approach fires from ____wind.
up
61
PASS
pull aim squeeze sweep
62
After an extinguisher has been completely discharged, _____ .
lay it on its side
63
How often must extinguishers be inspected?
at least annually
64
3 factors that affect the value of an extinguisher
serviceability accessibility ease of use
65
8 checks for a fire extinguisher inspection
``` in proper location and accessible. nozzle/horn for cracks/obstructions/dirt/grease. extinguisher cylinder for damage. legible operating instructions. check locking pin/tamper seal. full of agent and fully pressurized. inspection tag current. condition of hose/fittings. ```
66
29 CFR 1910.157 Subpart "L" (c) (5)
required employers to remove all obsolete extinguishers by January 1982
67
Halogenated Agents
halogenated hydrocarbons that contain carbon plus one or more elements from the halogen series.
68
Halogenated Agents are usually installed to protect _______ .
highly sensitive computer equipment
69
Halon
generic term for halogenated hydrocarbons
70
Halon fire extinguishers are ______ allowed.
no longer
71
Halogenated Agents extinguish fire by ______ .
interrupting the chemical chain reaction
72
halogenated vapor is ______ .
non-conductive
73
Halons _____ leave any residue.
do not
74
Halon 1211
bromochlorodifluoromethane. | replaced by FE-36 hexaflouropropane.
75
Halon 1311
bromotrifluoromethane. | replaced by FE-241 chlorotetrafluoroethane and FM-200 heptafluoropropane.
76
Do not use _______ in unvented, confined spaces because they might decompose and create toxic components.
halogenated agents
77
3 most common fire extinguishers
ABC AB BC

Keith's Cards (37 decks)

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