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What are the 5 classes of fire?
Classes A, B, C, D, K
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What does PASS mean for a fire extingusher?
- Pull Pin
- Aim Nozzle
- Squeese Trigger
- Sweep Flames
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How is the numerical rating for a fire extinguisher established?
Based on the size of the fire that the particular fire may extinguish
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What are some extinguishing agents? (7)
- Water
- CO2
- Dry chemical
- Wet chemical
- Dry powder
- foam
- Halogenated agents
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Why is water used to extinguish fires?
- cheap
- absorbes lots of heat
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What is a class A fire?
Normal Combustable materials
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What is a class B fire?
Flammable liquids
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What is a class C fire?
Electrical
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What is a class D fire?
combustable metals
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What is a class K fire?
Cooking oils and fats
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How is the numerical classification of fire extinguishers extablished for a class A extinguisher?
- 1-40A
- 5.5L:1
- If an extingusher can put out the same fire as 5.5L of water it is rated 1A
- If an extingusher can put out the same fire as 11L of water it is rated 2A
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How is the numerical classification of fire extinguishers extablished for a class C extinguisher?
- 1-640B
- Is based on the sq ft. of area the extinguisher can put out by an untrained person
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What test must a class C extinguishing agent pass?
It must not conduct electricity
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What are the symbols on the fire extingusher letters A, B, C, D, K?
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