Difference between revisions of "Fire extinguisher"
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| − | A '''fire extinguisher''' is a handheld, typically cylindrical, device used to extinguish small [[fire]]s. Such devices contain a fire-suppressive agent, | + | [[File:FireExtinguisherABC.jpg|thumb|right|A fire extinguisher]]A '''fire extinguisher''' is a handheld, typically cylindrical, device used to extinguish small [[fire]]s. Such devices contain a fire-suppressive agent, either under constant pressure or with the ability to quickly pressurize, and are used by spraying this suppressive agent over the base of a fire, smothering the fire. Modern extinguishers are almost always under constant pressure, but some (especially older types) use a chemical reaction to create a propellant gas. This kind must be turned upside-down when used to create the needed pressure. Fire extinguishers are generally used in an emergency, and should not be wasted on routine, controlled fires (such as a [[campfire]]). |
Modern fire extinguishers are rated for the types of fires they are effective against: | Modern fire extinguishers are rated for the types of fires they are effective against: | ||
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The steps in correct use of a fire extinguisher can be remembered by the acronym P.A.S.S.: Pull, Aim, Squeeze, Sweep. | The steps in correct use of a fire extinguisher can be remembered by the acronym P.A.S.S.: Pull, Aim, Squeeze, Sweep. | ||
| − | == See | + | == See also == |
* [[Fire safety]] | * [[Fire safety]] | ||
* [[Emergency links]] | * [[Emergency links]] | ||
| − | + | [[Category:Fire Fighting]] | |
| − | + | [[Category:Safety]] | |
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| − | [[Category : Safety | ||
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Latest revision as of 00:48, June 28, 2016
A fire extinguisher is a handheld, typically cylindrical, device used to extinguish small fires. Such devices contain a fire-suppressive agent, either under constant pressure or with the ability to quickly pressurize, and are used by spraying this suppressive agent over the base of a fire, smothering the fire. Modern extinguishers are almost always under constant pressure, but some (especially older types) use a chemical reaction to create a propellant gas. This kind must be turned upside-down when used to create the needed pressure. Fire extinguishers are generally used in an emergency, and should not be wasted on routine, controlled fires (such as a campfire).
Modern fire extinguishers are rated for the types of fires they are effective against:
- Class A: ordinary flammable solids, such as wood and paper.
- Class B: flammable liquids, such as grease, oil, and gasoline.
- Class C: electrical fires.
- Class D: flammable metals, such as titanium or magnesium.
The steps in correct use of a fire extinguisher can be remembered by the acronym P.A.S.S.: Pull, Aim, Squeeze, Sweep.