How does a fire extinguisher control fire?
In the heat of a fire, it releases a cloud of carbon dioxide that smothers the fire. That is, the gas drives oxygen away from the fire, thus stopping the chemical reaction.
How does a fire extinguisher work class 8?
The electrical fires are extinguished by using carbon dioxide gas fire extinguisher. 1)Carbon dioxide is denser than air and forms a layer around the burning substance.It covers the fire like a blanket due to which fresh air cannot reach the burning substance.
What is inside a fire extinguisher?
It releases a blanket of CO2 gas that keeps air from the fire. A dry-powder extinguisher (2) contains sodium bicarbonate, which smothers a fire. A soda-acid extinguisher (3) contains sodium carbonate and a flask of acid. If the flask is broken, a chemical reaction releases a stream of frothy water.
How can you tell if a fire extinguisher is still good?
Most fire extinguishers come with a pressure gauge that indicates the pressure level of the internal contents. If the gauge needle falls too low (you can tell if it is outside the green zone on the gauge), you know it’s time to replace your extinguisher.
When should you use a fire extinguisher?
You should only consider using a fire extinguisher if all members of your home have been alerted to the fire and the fire department has been called. Also, make sure you are safe from smoke and that the fire is not between you and your only escape route.
How much space is needed around a fire extinguisher?
NFPA recommends one 2-A fire extinguisher for every 3,000 square feet. OSHA requires employees to have access to an extinguisher within 75 feet. Employees should have access to a fire extinguisher within either 30 or 50 feet, depending on the hazard in question and the rating of the extinguisher (see below).
Can you move a fire extinguisher?
Transporting fire extinguishers is simple. Fire extinguishers contain chemicals at very high pressure. Transporting them involves moving slowly and cushioning the extinguishers so there is no risk of explosion or of accidentally activating the trigger mechanism.