Fire Extinguishers Flashcards

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1
Q

Class A

A

Ordinary combustibles

extinguished with water
class A foam
dry chemical
Green triangle

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2
Q

Class B

A

Flammable liquids

Extinguished with CO2
Dry chemical
Class B foam
Red square

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3
Q

Class C

A

Electrical

Turn power source off
Treat as Class A or B
Blue circle

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4
Q

Class D

A

Metals

Use dry powder to extinguish
Do not use dry chemical
Yellow star

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5
Q

Class K

A

Combustible cooking liquids

Extinguish with wet chemical
Portable extinguishers
Black octagon

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6
Q

Smothering
chain breaking
saponification

A

Smothering- Excludes oxygen

chain breaking- Interrupts chemical chain reaction

saponification- Forms oxygen excluding foam

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7
Q

Mechanisms to expel

Manual pump
Stored pressure
Pressure cartridge

A

Manual pump- physical pressure forces agent out nozel

Stored pressure- compressed Air or inert gas forces agent out nozzle

Pressure cartridge- external expelling forces agent out nozzle

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8
Q

Types of extinguishers

Pump type
Stored pressure
Water misted store pressure
Wet chemical
Aqueous film forming foam
Clean agent
A
Pump type- use in class A
Stored pressure- small class a fires
Water misted store pressure-class C
Wet chemical- class K
Aqueous film forming foam-class B
Clean agent- smothers A and B
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9
Q

CO2 extinguisher

A

Class B and C fires
dispersed by wind
limited reach

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10
Q

Dry chemical

A

Regular- B:C rated
Multipurpose- A:B:C rated
May react chemically with others
Non toxic
May reduce visibility may create respiratory problem
Cartridge operated and stored pressure
Steps- knock down flames then smother area

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11
Q

Dry powder

A

Class D metals
No single agent works on all metals
Creates smothering blanket
Steps- cover fire w powder, leave undisturbed

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12
Q

Class A ratings

A

1-A through 40-A

1-A 5L of water
2-A 10L of water

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13
Q

Class B ratings

A

1-B through 640-B

BasedOn the approximate square foot area of a flammable liquid fire a non-expert can extinguish

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14
Q

Class C ratings

A

Not extinguishing compatibility test

Tester to determine nonconductivity

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15
Q

Class D ratings

A

No Numerical rating

Based on type of combustible metal

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16
Q

Class K

A

No numerical rating

Based on capability of saponifying cooking oils

17
Q

3 types of multipurpose class extinguishers

A
Class abc 
class ab 
class bc
18
Q

2main goals of extinguishers

A

Minimize risk to life and property

effectively extinguish fire

19
Q

Factors determing type of wxtinguisher

A
Fuel classification 
rating
 life hazards 
training 
atmosphere 
conditions 
ease of handling 
operational concerns
20
Q

PASS

A

Pick up
approach
squeeze
sweep

21
Q

Factors determining value

A

Serviceability
Accessibility
Simplicity