explain how a fire estinguisher works
2007-06-30 19:45:38 · 7 answers · asked by chazel27 1 in Science & Mathematics ➔ Chemistry
Basically by supressing the amount of ractive agents in a fire. When something is burning it requires an oxidizing (oxigen)agent and fuel. A fire extinguisher has an agent (CO2, water, halon or a dry chemichal) under preasure in a sturdy cillynder container, that when deployed, diminishes the amount of oxigen that comes in contact with the fuel (whatever is burninng) Like puting a blanket on top of a fire (but much more effective. Different types of fire require different extinguishers, and they are rated A (solids like trash or wood), B (liquid fuels like gasoline or oil), C (electrical, the agent is not conductive), and D (flamable metals)
2007-06-30 19:52:42 · answer #1 · answered by ΛLΞX Q 5 · 2⤊ 0⤋
Fire extinguishers are sturdy metal cylinders filled with water or a smothering material. When you depress a lever at the top of the cylinder, the material is expelled by high pressure, similar to the way material is forced out of an aerosol can.
In this extinguisher, a plastic siphon tube leads from the bottom of the fire-suppressant reservoir to the top of the extinguisher. A spring-mounted valve blocks the passageway from the siphon to the nozzle. At the top of the cylinder, there is a smaller cylinder filled with a compressed gas -- liquid carbon dioxide, for example. A release valve keeps the compressed gas from escaping.
2007-07-01 02:56:36 · answer #2 · answered by Anonymous · 0⤊ 1⤋
a fire extinguisher is basicly foam in a bottle. when it is sprayed out, it takes the oxygen away from the fire. so without oxygen, a fire wouldnt be possible. therefore, stopping the fire. thats why something you see it come out as a white thick form, instead of the fog.
2007-07-01 02:51:07 · answer #3 · answered by blah 2 · 0⤊ 0⤋
Pressure is stored inside the cylinder, with the agent. When you squeeze the handle, the propellant and the agent sprays out the hose.
2007-07-01 02:49:19 · answer #4 · answered by Anonymous · 0⤊ 0⤋
It contains a mixture of two chemicals which release CO2 on reacting.
2007-07-01 02:59:40 · answer #5 · answered by ag_iitkgp 7 · 0⤊ 1⤋
http://home.howstuffworks.com/fire-extinguisher.htm
2007-07-01 04:00:24 · answer #6 · answered by Yash 2 · 1⤊ 0⤋
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2007-07-01 02:49:45 · answer #7 · answered by help_me7 1 · 2⤊ 0⤋