You asked: How does a fire extinguisher work chemistry?

Most fire extinguishers work by separating the fuel from the oxygen. The oxygen comes from the air. It is the same oxygen we breathe. Since the oxygen has to be in contact with the fuel, if you can coat the fuel with something that keeps the oxygen away, the fire will go out.

How does a fire extinguisher basically work?

Basically, there are two types of fire extinguishers: those with internal stored pressure and those where a cartridge system is used to deliver pressure. … When you press the lever on the top of the extinguisher, a valve inside is forced open, releasing the pressurized gas and extinguishing agent through the nozzle.

What are the three basic steps to take during a fire emergency?

Fire – Reporting

  • Close the door to the room where the fire is located. This will confine the fire to a smaller area.
  • Activate the closest fire alarm system. …
  • Phone 2111 to report the location of the fire. …
  • Extinguish or Evacuate. …
  • Do not re-enter the building, until:

How much pressure is in a fire extinguisher?

An extinguisher needs enough charge so that when it is discharged, there is an ample amount of dry chemical with a velocity sufficient enough to propel the chemical 10-20 feet. The range of a properly charged extinguisher is between 185-205 p.s.i. This value is displayed on the pressure gauge.

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Do fire extinguishers expire?

Even if there’s no expiration date, it won’t last forever. Manufacturers say most extinguishers should work for 5 to 15 years, but you might not know if you got yours three years ago or 13. … If it falls anywhere else, the extinguisher is unreliable and should be serviced or replaced.

What is fire starvation?

Starvation is the process of depriving the fire of fuel, i.e. combustible materials. … Smothering is the process of depriving the fire of the oxygen needed to sustain the combustion process.

Tame a raging fire