It covers the burning material, pushing out air - which the fire needs to 'breathe'. Essentially - it suffocates the fire.
Because that is what the Dry powder (or Dry Chem.) is made for.
Dry powder essentially "suffocates" a fire by displacing the oxygen necessary to maintain the flame. Which takes out one of the three vital things a fire needs, heat, oxygen and fuel.
If it is a fire caused by petrol, use powder to extinguish it.
a dry powder
wind
ALL fire extinguishers are designed to put out fires. A Dry extinguisher uses a powder or gas rather than a liquid, and cuts off the oxygen to the fire. They can be used in freezing conditions where a water type extinguisher would be useless.
To put out a sodium fire, you can use a Class D fire extinguisher specifically designed for metal fires. Never use water, as it can react violently with sodium and worsen the situation. Additionally, you can smother the fire with sand or dry powder to deprive it of oxygen.
A dry powder fire extinguisher is mostly recommended for use in vehicles and in the home. So basically they are usually used for small fire emergencies.
yes, but it will eventually dry out on its own
treatment for breathing in fire extinguisher power
Sodium chloride dry powder
dry sand or powder