Fire extinguishers contain different chemicals, depending on the application. Handheld extinguishers, which are commonly sold at hardware stores for use in the kitchen or garage, are pressurized …
A dry chemical fire extinguisher is a fire extinguisher designed to put out fires of several types. They contain chemicals that can smother flames and coat fuel with a thin layer of dust. That helps extinguish fires on the spot.
How Does a Fire Extinguisher Work? – SelectSafety.net
Heat. The purpose of a fire extinguisher is to break this process by removing or blocking one of these three elements. Once this happens, the fire will either extinguish immediately or burn out. To remove heat, a fire extinguisher can smother the fire. To remove oxygen, the fire extinguisher can smother it as well.
To discharge the chemical in most cases, pull the safety pin. Next, point the hose at the flames and squeeze the handle to release the fire-fighting chemical. Replace the hose if you notice cracks or it is too fragile to bend easily. If an extinguisher comes with a safety tie, ensure that the pin is secured to it.
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What chemicals are in a fire extinguisher?
Fire extinguishers contain different chemicals, depending on the application. Handheld extinguishers, which are commonly sold at hardware stores for use in the kitchen or garage, are pressurized with nitrogen or carbon dioxide (CO2) to propel a stream of fire-squelching agent to the fire. The active material may be a powder such as potassium …
Why don’t fire extinguishers use CO2?
In these situations, fire extinguishers use different materials–ones that flood a protected compartment with a fire-fighting gas. CO2 works well, but is fatal at the concentrations necessary to extinguish a fire, and so cannot be used where people will be present.
How does a handheld fire extinguisher work?
Handheld extinguishers, which are commonly sold at hardware stores for use in the kitchen or garage, are pressurized with nitrogen or carbon dioxide (CO2) to propel a stream of fire-squelching agent to the fire.
How do HFCS extinguish fires?
HFCs extinguish fires in a manner similar to CO2 or N2 –by absorbing heat and reducing the concentration of oxygen. Even so, several different companies are marketing such HFCs as CHF3, C2HF5, and C3HF7 for a variety of applications.
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TYPES OF FIRE AND FIRE EXTINGUISHERS | WHICH FIRE EXTINGUISHER TO BE USED ON WHICH CLASSES OF FIRE Video Answer
Reference:
https://www.usfa.fema.gov/
https://en.wikipedia.org/wiki/Fire_extinguisher