Fire Extinguishers Flashcards by Phillip Celaya

Portable fire extinguishers are the most common…

Fire protection appliances

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

Incipient or early growth stage

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How many classes of fire extinguishers are there?

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Before selecting the appropriate extinguisher you must…

Determine what is burning

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Name the 5 classes of fires

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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Know examples of Class A fires…

Paper
Plastic
Wood
Rubber…

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Class A fires can be easily extinguished with ____ based agents

Water

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Know examples of Class B fires…

Alcohol
Gasoline
Duhhhhhh

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Agents used to extinguish Class B fires…

CO2
Dry Chemical
Class B Foam

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

They will not conduct electricity

CO2
Halon

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

Class A or B fire

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Be able to list some combustible metals…

Lithium
Magnesium
Potassium
Sodium

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What are 2 common uses of magnesium?

Wheels and transmissions

Some metal box springs

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What is an indication of a magnesium fire?

Bright white light emitting during the combustion process

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Name some things that fall under a class K fire…

Veg oils

Animal fats

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2 types of Class K extinguishment are…

Wet chemical systems

Portable fire extinguishers

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

Smothering
Cooling
Chain breaking
Saponification

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

Water
CO2
Foam
Clean agents
Dry Chemical
Wet Chemical
Dry Powder

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

Manual pump
Stored pressure
Pressure cartridge

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Pump type H2O extinguishers are commonly used in…

Wildland firefighting

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What is “PW” when referring to fire extinguishers?

Pressurized water

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What are stored pressure H2O extinguishers useful for?

All types of small class A fires

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

Air or nitrogen

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

Surface tension

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

30-40

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

Water mist stored pressure use deionized water as agent | Safe on Class C fires

Wet chemical extinguishers are designed for what class of fires?

Class K

Wet chemical extinguishers are _____ based with a low __

Potassium | Low ph

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

Saponification

What does AFFF stand for?

Aqueous film forming foam

AFFF extinguishes flames with what method?

Suppression

The stored pressure on AFFF cans comes form ___ or ____

Air or nitrogen

How should you apply AFFF to a fire?

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

Clean agent extinguishers are designed to replace...

Halogenated extinguishing agents

Clean agent extinguishers rapidly evaporate and leave no ____

Residue

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

Class A, B, C

What are the 2 ways that CO2 extinguishers come?

Handheld and wheeled

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

Class B, C

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

Liquified gas | Gas

CO2 is discharge through a rubber or plastic ____

Horn

How does CO2 put out a fire?

Displacing O2 and smothering

What is the reach of a CO2 extinguisher?

3-8 Feet

True/False Dry chemical and dry powder are the same thing

FALSE

What are dry chemical extinguishers used for? (Classes)

Class A, B, C

What is the most common extinguisher used today?

Dry chemical

What are the 2 types of dry chemical extinguishers?

Regular B, C rated | Multipurpose A, B, C rated

True/False Dry chemical agents are nontoxic

TRUE

Dry chemical agents may be mildly ___ to all surfaces

Corrosive

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

Visibility | Respiratory problem

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

Cartridge operated | Stored pressure

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

200 psi

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

CO2 or Nitrogen

Dry powder extinguishers are designed for class __ fires

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

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

Shovel or scoop

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

Creates a smothering blanket over the metal

How should you apply dry powder to a fire?

Gently to avoid breaking the crust the forms over the metal

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

Performance capacity

Fire extinguisher ratings are determined by the ____ ___

Underwriters Laboratories

Class A extinguishers are rated from ____ ___ through ___ ___

1A through 40A

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

1 1/4 gallons | 2 1/2 gallons

Class B extinguishers | Ratings from ___ through ___

1B through 640B

Class B extinguishers are rated based on...

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

A class C extinguisher confirms that it will not...

Conduct electricity

Class D extinguisher testing is based on...

The metal being tested

Class D instructions will be located...

On the faceplate of the extinguisher

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

Alkaline

What 4 things should you inspect before using an extinguisher?

External condition Hoze/nozzle Weight Pressure gauge

What does PASS stand for?

Pull Aim Squeeze Sweep

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

NFPA 10 | 1 time

Where can you check for the last inspection?

Inspection tag

Recharge an extinguisher if it is deficient by...

10 percent

Where will you find the extinguisher weight?

Stamped on the neck

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

Monthly

When should you clean an extinguisher?

After each use

TFD hydrostatically tests our extinguishers every ___ years

The hydrostatic test results must be fixed to the...

Extinguisher shell

Fire Extinguishers Flashcards

(77 cards)