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Foam > Ch 2 > Flashcards

Ch 2 Flashcards

1
Q

How does foam prevent/extinguish fire

A

Separate
Cools
Suppresses

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2
Q

How many categories of mechanical concentrators are there

A

2

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3
Q

What class is ordinary combustibles

A

A

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4
Q

What class is flammible/combustibles

A

B

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5
Q

What is needed to produce a foam blanket

A

Foam
Water
Air
Mechanical aeration

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6
Q

What solvents can be used on hydrocarbon fires

A

Polar

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7
Q

What is a key characteristic when choosing a foam

A

Expansion

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8
Q

What refers to an increase volume of solution

A

Expansion

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9
Q

What are the 3 types of foam expansion

A

Low
Med
High

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10
Q

What is the low ratio

A

Up to 20 parts

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11
Q

What is medium ratio

A

20-200 parts

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12
Q

What is high ratio

A

200-1000 parts

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13
Q

What is the normal storage temp range

A

35-120

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14
Q

Who established corrosion rates for class A

A

NFPA

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15
Q

What is the NFPA for Class A foam

A

1150

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16
Q

Using foam and dry chemicals as a mix is commonly referred to as

A

Multiagents

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17
Q

Where are cart mounted units commonly found

A

Industrial facilities

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18
Q

What is the primary concern of finished foam

A

Impact

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19
Q

What areas should be avoided for discharge

A

Rivers
Lakes
Streams

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20
Q

What does decomposition of foam result in

A

Consumption of oxygen

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21
Q

What is a measure of determining stability of foam

A

Rate of drain

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22
Q

What foam is thick and viscous

A

AR-AFFF

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23
Q

What is Clas A foam a formulation of

A

Hydrocarbon surfactants

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24
Q

What is best for developing long lasting class A foam

A

Small bubbles of consistent size

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25
Q

Class A foam does not adhere to surfaces above what temp

A

212

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26
Q

What percent do most foam nozzles produce stabil foam

A

1

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27
Q

What percent is class A mixed in portions of

A

0.1-1%

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28
Q

What percent are fire attack nozzles at

A

0.2-0.5

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29
Q

What percent for exposure protection

A

0.5-1%

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30
Q

What percent for air aspirating nozzles

A

0.3-1%

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31
Q

What percent for compressed air systems

A

0.2-0.5%

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32
Q

What is the most common agent used at a structure fire

A

Water

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33
Q

What foam is most beneficial for rapid fire extinguishment when water supply is low

A

Class A

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34
Q

What are the 2 types of class B foam

A

Synthetic

Protein

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35
Q

What type of protein is class B foam made from

A

Animal

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36
Q

What is synthetic class B foam made from

A

Mixture of flurosurfactants

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37
Q

What foam is the exception when being stored together

A

Milspec

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38
Q

How long does it take protein based foam to degrade

A

2-8 days

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39
Q

How long does it take synthetic foam to degrade

A

20-40 days

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40
Q

Above what temp does class B foam break down

A

150

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41
Q

What are examples of polar solvents

A

Alcohol
Ketones
Esters

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42
Q

What is the primary reason class A foams are not recommended on class B fires

A

No fuel resistance

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43
Q

What is class B foam proportioned at

A

1-6%

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44
Q

What percent is used on hydrocarbons

A

3%

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45
Q

What percent is used on polar solvents

A

6

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46
Q

What percent is high expansion foam typically used at

A

1-2.5%

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47
Q

What should the discharge rate of foam be equal to

A

10% of area of spill

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48
Q

What type of foam is well suited for sub surface injection

A

Fluroprotein

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49
Q

How long does fluroprotein foam maintain its alcohol resistance

A

About 15

50
Q

What type of foam is completely synthetic

A

AFFF

51
Q

What is the storage temp range of AFFF *****

A

25-120°

52
Q

What is the temp AFFF is affected by

A

Above 140

53
Q

What percent is AR-AFFF used at for depths less than 1 inch

A

1%

54
Q

What percent is AR-AFFF used at for polar solvents more than 1 inch

A

3%

55
Q

What concentrate is NOT designed for premixing

A

AR-AFFF

56
Q

Where is high expansion foam nit recommended for use

A

Outside

57
Q

What concentrate is meant for use on class A or B fires

A

Emulsifiers

58
Q

What method uses a foam eductor

A

Induction

59
Q

What method uses a pump or bladder

A

Injection

60
Q

What depth emulsifiers be used

A

Less than 1in thick

61
Q

What system is uses on apparatuses

A

Injection

62
Q

What is the simplest form of mixing foam

A

Batch mix

63
Q

What form is used to mix within apparatus

A

Batch mix

64
Q

How many times can a premix be used

A

1

65
Q

What tanks are foam friendly

A

Polly
Fiberglass
Stainless steel

66
Q

What is the NFPA for apparatus

A

1901

67
Q

How much does foam weigh per gallon

A

9lbs

68
Q

How many gallons are in bulk containers

A

250-450

69
Q

What is the tank capacity on tenders

A

1500-8000

70
Q

What is the tank capacity on pumpers

A

20-200

71
Q

What is the tank capacity on ARFF

A

Up to 600

72
Q

What is the tank capacity on fixed mount tanks

A

In excess of 3000

73
Q

What is typically a viscous foam

A

AR-FFFP

74
Q

What is viscosity affected by

A

Temp

75
Q

Polar solvent foam will work on what other type fires

A

Hydrocarbon

76
Q

Fluroprotein foam will not extinguish what type of fire

A

Polar solvent

77
Q

What foams are used for multiagent attacks

A

AFFF

FFFP

78
Q

What foams have a lethal affect on fish

A

Class A

79
Q

What class of foam continues to wet as it drains

A

A

80
Q

What is high expansion foam used for

A

Flooding confined spaces

81
Q

What is the amount of liquid that drains from the bubble mass affected by

A

Expansion Ratio

82
Q

What drainage rate does wet, class A foam have

A

Fast

83
Q

What drainage rate does dry class A foam have

A

Slow

84
Q

What 2 adjustments are strongly needed for medium finished foam

A

Air

Concentrate

85
Q

What type of materials absorb water

A

Fibrous

86
Q

What nozzle is used to apply AFFF and FFFP concentrates

A

Fog nozzle

87
Q

What fuels is Mil-spec foams only uses on

A

Simple Hydrocarbon

88
Q

What type of foam does not reduce oxygen levels

A

Synthetic

89
Q

How do AR foams protect the finished foam

A

Creates a Membrane between the fuel and finished foam

90
Q

What foams are referred to as smart foams

A

AR

91
Q

Gasoline blended with above what percent of oxygen or ethanol require AR foam

A

10%

92
Q

What is the proper percent for Class B foam regardless of which type of fuel they are used on

A

3%

93
Q

What foams are virtually nonexistent

A

Protein

94
Q

What foam is non compatable with dry extinguishing agents

A

Protein

95
Q

What foam is only used on hydrocarbon fires

A

Protein

96
Q

What foam flows across fuel surfaces rapidly

A

Fluroprotein

97
Q

What percent is FFFP foam used on hydrocarbon fuels

A

3%

98
Q

What percent is FFFP used on polar solvent fuels

A

6%

99
Q

What is created when AR-AFFF is applied to polar solvent fuels

A

A membrane

100
Q

What is vapor-mitigating foam designed for sole use on

A

Unignited spills of hazmat

101
Q

When is a slow draining foam blanket desired

A

Long term vapor suppression

102
Q

What foam is commonly batch mixed

A

Class A

103
Q

How does alcohol resistance foam protect the finished foam

A

Providing a membrane

104
Q

What is new multipurpose foam eductucted at

A

3%

105
Q

What is the application rate for a spill that is 1000 sqft

A

200gpm

106
Q

What light hydrocarbons can AR-AFFF be injected into

A

Gasoline
Kerosene
Jet fuel

107
Q

What is added to class A foam that improves absorption

A

Nonfoaming
Ionic
Nonionic surfactants

108
Q

Where is regular protein found

A

Fixed fire suppression systems

109
Q

What are the types of protein used in foam

A

Hooves
Horn
Feathers meal

110
Q

What is the drop test for a barrel

A

5ft

111
Q

What is the drop test for a pail

A

4ft

112
Q

What concentrates have temp storage range of 35-120

A

UL listed

113
Q

What is a Halon substitute

A

Foam

114
Q

What foams tend to be fast drainers that spread rapidly across liquid fuel surfaces

A

AFFF

FFFP

115
Q

What surfaces over 212 does class A foam not adhere to

A

Vertical

116
Q

What conditions strongly influence the course of a wildland fire

A

Density
Composition
Climate
Moisture

117
Q

What devices is 1% AR foam applied with

A

Type 3

118
Q

What is fluoroprotein foam a combination of

A

Protein

Synthetic

119
Q

What is the most commonly used foam

A

AFFF

120
Q

What concentrate has more film forming foam

A

Mil-spec

Foam (1 decks)

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