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

IFSTA(5th)-Chapter 6 Flashcards

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
Q

Class K extinguishing agents

A

wet chemicals

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25
Q

Conductivity

A

ability of a substance to conduct an electrical current.

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26
Q

Alloy

A

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.

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27
Q

APW extinguishers

A

air pressurized water extinguishers

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28
Q

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.

A

de-ionized water
fine mist
safe

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29
Q

AFFF

A

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 ā€œlight waterā€

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30
Q

Air-Aspirating Foam Nozzle

A

designed to provide aeration to provide the highest quality foam

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31
Q

AFFF can be applied by

A

raining down

deflection

32
Q

EPA

A

environmental protection agency

33
Q

5 facts about ā€œclean agentsā€

A

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
Q

4 examples of clean agents

A

HCFC-hydrochloroflourocarbon
HFC-hydrofluorocarbon
PFC-perflourocarbon
FIC-flouroidiocarbon

35
Q

CO2 is stored under ______ as a liquified gas ready for release at any time.

A

itā€™s own pressure

36
Q

CO2 discharges at _____ temp.

37
Q

2 reasons not to touch a CO2 horn during discharge

A

static electricity builds up

subzero temp.

38
Q

Dry chemicals are mixed with _____ during manufacture to prevent caking.

A

small amounts of additives that make them resistant to moisture

39
Q

Corrosive Materials

A

gas, liquid, or solid material that can burn, irritate, or destroy human skin and can severely corrode steel.

40
Q

Cartridge-Operated extinguishers

A

employ a pressure cartridge that pressurizes the tank after a plunger is pushed.

41
Q

2 types of cartridge-operated extinguishers

A 
CO2
dry nitrogen(for freezing temps)
42
Q

Wheeled dry chem extinguishers must have their _____ before the extinguisher is pressurized.

A

hoses deployed

43
Q

Wheeled dry chem extinguishers have ______ nozzle reaction.

A

significant

44
Q

Dry powder is applied _______

A

gently and in sufficient depth to create a smothering blanket.

45
Q

What extinguishing agent when applied to class D fires causes a violent reaction, intensifies combustion, and causes bits of molten material to spatter?

46
Q

performance capability

A

the # on an extinguisher

47
Q

UL

A

underwriters laboratories inc.

48
Q

Class A ratings

A

1A-40A

A=1.25gallons of water would b required

49
Q

Class B ratings

A 
1B-640B
B=1 square foot of a class B fire that a non- expert can extinguish.
50
Q

For an extinguisher to be rated for Class C fires, the extinguishing agent must be _______ .

A

non-conductive

51
Q

Extinguishers are classified for their _______ .

A

intended use

52
Q

Wood cribs

A

water used to extinguish fires in these cribs determine class A ratings

53
Q

Class D extinguishers are not given a _______ and _______ be used on any other class fire.

A

rating

cannot

54
Q

2.25 square feet

A

minimum surface area of a cooking fire that must be extinguished to meet the minimum criteria for a class K rating.

55
Q

Class of Fire Symbols

A 
A=green triangle
B=red square
C=blue circle
D=yellow star
K=black hexagon
56
Q

Extinguishers suited for______ are identified by combinations of letters and numbers.

A

more than 1 class of fire

57
Q

8 factors to selecting the proper fire extinguisher

A 
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
Q

Operate an extinguisher from _____ the fire and your exit.

59
Q

4 checks of an extinguisher prior to immediate use

A

is it pressurized
weight(is the agent inside?)
hose/nozzle in place
external condition

60
Q

Approach fires from ____wind.

61
Q

PASS

A

pull
aim
squeeze
sweep

62
Q

After an extinguisher has been completely discharged, _____ .

A

lay it on its side

63
Q

How often must extinguishers be inspected?

A

at least annually

64
Q

3 factors that affect the value of an extinguisher

A

serviceability
accessibility
ease of use

65
Q

8 checks for a fire extinguisher inspection

A 
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
Q

29 CFR 1910.157 Subpart ā€œLā€ (c) (5)

A

required employers to remove all obsolete extinguishers by January 1982

67
Q

Halogenated Agents

A

halogenated hydrocarbons that contain carbon plus one or more elements from the halogen series.

68
Q

Halogenated Agents are usually installed to protect _______ .

A

highly sensitive computer equipment

69
Q

Halon

A

generic term for halogenated hydrocarbons

70
Q

Halon fire extinguishers are ______ allowed.

71
Q

Halogenated Agents extinguish fire by ______ .

A

interrupting the chemical chain reaction

72
Q

halogenated vapor is ______ .

A

non-conductive

73
Q

Halons _____ leave any residue.

74
Q

Halon 1211

A

bromochlorodifluoromethane.

replaced by FE-36 hexaflouropropane.

75
Q

Halon 1311

A

bromotrifluoromethane.

replaced by FE-241 chlorotetrafluoroethane and FM-200 heptafluoropropane.

76
Q

Do not use _______ in unvented, confined spaces because they might decompose and create toxic components.

A

halogenated agents

77
Q

3 most common fire extinguishers

Keith's Cards (37 decks)

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