im am hgyegbsdn xshishit
which gas helps to make the foam that firefighters use
Carbon Dioxide is the most common gas in fire extinguishers.
The same air that we breathe !!
fire retardants used in the foam are trimethyltrimethylene glycol and hexylene glycol.
It's Carbon Dioxide (CO2)
The foam is not gas, but chemicals that prevent the fuel source in a fire from receiving the oxygen needed to sustain a fire.
Air is the gas most commonly used to create the foam that firefighters use. Most commonly, the foam is generated by adding a small amount (1%-5%) of foaming agent into the water flow coming from the fire engine. This is done by either injecting it into the water stream with a small metering pump, or with a foam eductor which draws the foam into the water stream using a venturi. A foam play pipe, or Foam nozzle is used on the end of the water line which is designed to draw air into the stream of water, and creates the foam. More recently air compressors (CAFS - Compressed Air Foam System) are being added to some newer fire apparatus which injects air directly into the water stream. This allows for even less water to be used in firefighting, and produces a more consistant foam.
No. Fire extinguishers use a dry powder to smother the fire. Firefighters use two types of foam that can be broken down into more categories. A class "A" foam is actually a type of soap. It is used to break up water tension so that water can seep into the ground and/or fuel better. A class "B" foam is used to make a blanket that smothers gasoline or diesel type fires.
AFFF or aqueous fire fighting foam is a chemical agent that is added to water usually at a rate of about 300:1 (300gal water for 1gal foam concentrate) this mixture is then mixed with the outside air as it exits the nozzle and creates a blanket of foam that suffocates the fire.
Yeah because it makes it wet ;)
well the tank that holds the foam is compressed with co2 but what actually makes the foam is the nozzle it acts as an aerator and thus making the liquid into foam ----------------------------------------- Air is the most simple example of gas used in foam fire extinguishers.
Most firefighting foams use regular air. Before air is introduced, the liquid foam product is proportioned into water either ahead of time or as it flows through the fire house. Air is mixed with the foam/water solution either at the nozzle or by using an air compressor (Compressed-Air Foam System(CAFS))