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TFD BC > Fire Extinguishers > Flashcards

Fire Extinguishers Flashcards

1
Q

Portable fire extinguishers are the most common…

A

Fire protection appliances

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2
Q

What stage/s are fire extinguishers intended to be used on?

A

Incipient or early growth stage

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3
Q

How many classes of fire extinguishers are there?

A

5

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4
Q

Before selecting the appropriate extinguisher you must…

A

Determine what is burning

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5
Q

Name the 5 classes of fires

A 
Class A- Ordinary combustibles
Class B- Flammable liquids
Class C- Energized electrical
Class D- Combustible metals
Class K- Grease fires (Power point says "Grease laden equipment)
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6
Q

Know examples of Class A fires…

A

Paper
Plastic
Wood
Rubber…

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7
Q

Class A fires can be easily extinguished with ____ based agents

A

Water

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8
Q

Know examples of Class B fires…

A

Alcohol
Gasoline
Duhhhhhh

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9
Q

Agents used to extinguish Class B fires…

3

A

CO2
Dry Chemical
Class B Foam

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10
Q

Class C extinguishers have a special property that allows them to be effective on electrical fires…

A

They will not conduct electricity

CO2
Halon

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11
Q

Once power is turned off on a Class C fire, it becomes…

A

Class A or B fire

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12
Q

Be able to list some combustible metals…

A

Lithium
Magnesium
Potassium
Sodium

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13
Q

What are 2 common uses of magnesium?

A

Wheels and transmissions

Some metal box springs

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14
Q

What is an indication of a magnesium fire?

A

Bright white light emitting during the combustion process

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15
Q

Name some things that fall under a class K fire…

A

Veg oils

Animal fats

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16
Q

2 types of Class K extinguishment are…

A

Wet chemical systems

Portable fire extinguishers

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17
Q

What are the 4 methods that fire extinguishers use to put out a fire?

A

Smothering
Cooling
Chain breaking
Saponification

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18
Q

What are the 7 types of fire extinguishers listed in the power point?

A 
Water
CO2
Foam
Clean agents
Dry Chemical
Wet Chemical
Dry Powder
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19
Q

What are the 3 types of expelling methods for fire extinguishers?

A

Manual pump
Stored pressure
Pressure cartridge

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20
Q

Pump type H2O extinguishers are commonly used in…

A

Wildland firefighting

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21
Q

What is “PW” when referring to fire extinguishers?

A

Pressurized water

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22
Q

What are stored pressure H2O extinguishers useful for?

A

All types of small class A fires

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23
Q

With a stored pressure H2O extinguisher, the 2 gases that supply pressure are ___ or ____

A

Air or nitrogen

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24
Q

You can add a class A foam to a PW can to reduce ___ ___

A

Surface tension

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25
Q

The straight stream on a PW can have a range of __ to __ feet.

A

30-40

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26
Q 
What is the difference between water mist stored pressure and regular stored pressure?
What other class of fire can it be used on?
A

Water mist stored pressure use deionized water as agent

Safe on Class C fires

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27
Q

Wet chemical extinguishers are designed for what class of fires?

A

Class K

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28
Q

Wet chemical extinguishers are _____ based with a low __

A

Potassium

Low ph

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29
Q

Wet chemical extinguishers combine with oils to make a soapy surface which is known as…

A

Saponification

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30
Q

What does AFFF stand for?

A

Aqueous film forming foam

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31
Q

AFFF extinguishes flames with what method?

A

Suppression

32
Q

The stored pressure on AFFF cans comes form ___ or ____

A

Air or nitrogen

33
Q

How should you apply AFFF to a fire?

A

Don’t spray directly on spill, rain the agent down or deflect from a nearby object

34
Q

Clean agent extinguishers are designed to replace…

A

Halogenated extinguishing agents

35
Q

Clean agent extinguishers rapidly evaporate and leave no ____

36
Q

Clean agent extinguishers can be used on what class fire/s?

A

Class A, B, C

37
Q

What are the 2 ways that CO2 extinguishers come?

A

Handheld and wheeled

38
Q

CO2 is most effective for what class of fire/s?

A

Class B, C

39
Q

CO2 is stored as a ___ ___ and converts to ___ when discharged

A

Liquified gas

Gas

40
Q

CO2 is discharge through a rubber or plastic ____

41
Q

How does CO2 put out a fire?

A

Displacing O2 and smothering

42
Q

What is the reach of a CO2 extinguisher?

43
Q

True/False

Dry chemical and dry powder are the same thing

44
Q

What are dry chemical extinguishers used for? (Classes)

A

Class A, B, C

45
Q

What is the most common extinguisher used today?

A

Dry chemical

46
Q

What are the 2 types of dry chemical extinguishers?

A

Regular B, C rated

Multipurpose A, B, C rated

47
Q

True/False

Dry chemical agents are nontoxic

48
Q

Dry chemical agents may be mildly ___ to all surfaces

49
Q

Dry chemical agents may produce a cloud which may reduce ____ and create a ____ ____

A

Visibility

Respiratory problem

50
Q

Dry chemical handheld units can either be ___ ____ or ___ ___

A

Cartridge operated

Stored pressure

51
Q

A constant pressure of ____ psi is maintained in the agent storage tank for dry chemical extinguishers

52
Q

For dry chemical extinguishers, both cartridge and stored pressure will use what 2 gases?

A

CO2 or Nitrogen

53
Q

Dry powder extinguishers are designed for class __ fires

54
Q

Is there a single agent that will put out all combustible metal fires?

55
Q

Some powdered agents are designed to be used with an extinguisher, others are designed to be applied with a….

A

Shovel or scoop

56
Q

How do dry powder agents put out a class D fire?

A

Creates a smothering blanket over the metal

57
Q

How should you apply dry powder to a fire?

A

Gently to avoid breaking the crust the forms over the metal

58
Q

Class A and B extinguishers are also rated according to their ___ ___

A

Performance capacity

59
Q

Fire extinguisher ratings are determined by the ____ ___

A

Underwriters Laboratories

60
Q

Class A extinguishers are rated from ____ ___ through ___ ___

A

1A through 40A

61
Q

Class A Extinguishers
For 1A rating ___ gallons of water is required
For 2A rating ___ gallons of water is required

A

1 1/4 gallons

2 1/2 gallons

62
Q

Class B extinguishers

Ratings from ___ through ___

A

1B through 640B

63
Q

Class B extinguishers are rated based on…

A

The approximate square footage of liquid a non expert can extinguish with one full extinguisher

64
Q

A class C extinguisher confirms that it will not…

A

Conduct electricity

65
Q

Class D extinguisher testing is based on…

A

The metal being tested

66
Q

Class D instructions will be located…

A

On the faceplate of the extinguisher

67
Q

Class K extinguishers have a wet chemical agent containing an ____ mixture

68
Q

What 4 things should you inspect before using an extinguisher?

A

External condition
Hoze/nozzle
Weight
Pressure gauge

69
Q

What does PASS stand for?

A

Pull
Aim
Squeeze
Sweep

70
Q

NFPA ___ requires extinguishers to be inspected at least __ time/s each year

A

NFPA 10

1 time

71
Q

Where can you check for the last inspection?

A

Inspection tag

72
Q

Recharge an extinguisher if it is deficient by…

A

10 percent

73
Q

Where will you find the extinguisher weight?

A

Stamped on the neck

74
Q

How often should you shake dry chemical extinguisher to loosen the agent?

75
Q

When should you clean an extinguisher?

A

After each use

76
Q

TFD hydrostatically tests our extinguishers every ___ years

77
Q

The hydrostatic test results must be fixed to the…

A

Extinguisher shell

TFD BC (26 decks)

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