I'm worried because I don't see mine blinking. How do I check if it's working?
Foam is both a liquid and a gas. I would classify it as primarily a liquid as it flows and handles like a liquid and will conform to the shape of its container. Foam contains gas contained in pockets formed by liquid surface tension. Because foam contains so many tiny bubbles there is an insulation property as well. There are two methods of creating foam. A chemical reaction like acid and baking soda for example. The CO2 gas produced in the reaction not only propells the foam from the portable extinguisher but also fills the bubbles which make up the foam. Other chemicals are added to the dry mix which enhance the durability of the foam. These older style chemical reaction extinguishers consisted of an open top container of acid placed in a container packed with the powered chemical. To activate this extinguiser on inverted the extinguisher and the chemical mixed forcing the mixture out from the extingisher. (This is an obsolete style of extinguisher) high volume foam production is done by mechanical means. Water pumped through the fire hose is passed through what is called a proportioner. Liquid foam concentrate is added in specific quantity to the water in the propertioner. this mixed solution is then passed to the fire nozzel. Depending on the nozzel style aurrounding air is mixed with teh foam mixture to aireate it. Other types like AFFF (Aqueous Film Forming Foam) are applied with a standard nozzel and form a thin light foam not the large fluffy stuff you may be thinking of. Protein based foam concentrates are used to make this fluffly foam and require special applicator nozzels to whip up the foam mixture with air. This heavier foam is denser and has a greater insulation and heat resistance than the lighter AFFF.
OH wow!! That's scary! Well the scariest thing that happened to me was when I was walking to my friends house which was 3 miles, and it was getting dark! There was no street lights on the road so I turned on the flash light feature on my phone. (which didn't have any service where I lived otherwise I would've called her!) I passed this certain house and this guy yelled out WHAT ARE YOU DOING?! and I thought he was talking to someone else. He hopped into his truck and started HUNTING ME DOWN TWICE!!! It scared the living daylights out of me! The first time he hunted me down I hid in the bushes (there was this drive way and it was wooded. The second time he hunted me down I hid under a bridge! and that's what happened! He didn't do anything after that! I told my friend when I got to her place and she laughed at me :( :( I was very shaky too!
