BrainStuff Classics: How Do Fire Extinguishers Work?
Back when Lexus opened its doors. One of the first dealers made an important observation. Lexus wasn't in the car business. They were in the people business. They needed to be helpful. Respectful and compassionate to treat people liked guest. Now when people need this most lexus will continue to do what they've always done. Take care of people. I visit Lexus. Dot Com slash people first to find out what Lexus is doing for their guest and for our communities. Welcome to brainstorm production of iheartradio. Hey Rain Stuff. Unlearn vocal bomb and this is a classic episode from our previous Christian. Sager the fire. Extinguisher is an amazing piece of simple equipment. That can help you smother fire. Should it happen to get a little out of control in this episode? We explain how they work. And what kinds work for. What kinds of fires stuff it's Christian? Sager let's talk about fire. Fires the result of a chemical combustion reaction typically between oxygen and some sort of fuel like wood or gasoline for the reaction to occur? The fuel has to reach its ignition temperature for would that's about five hundred degrees. Fahrenheit or two hundred and sixty degrees Celsius the heat decomposes some of the woods cellulose and the decomposed stuff is released as volatile gases like a compound hydrogen carbon and oxygen when the gas is hot enough. It's molecules break. Apart the atoms recombine with oxygen to form water carbon dioxide and other products. The heat keeps the fuel at the ignition temperature so it keeps burning as long as there is fuel and oxygen so there you have it fire. The result of extreme heat oxygen and fuel. But what about fire extinguishers they remove at least one of these elements from the equation? Fire extinguishers are metal cylinders filled with water or smothering material. And when you depress a lever at the top. The material is expelled by high pressure. Kind of like an aerosol can imagine a fire extinguisher cut in half. Okay that Plastic Siphon Tube leads from the bottom of the fire suppressant reservoir to the top of the extinguisher. A spring mounted valve blocks the passageway from the Siphon to the nozzle and at the top of the cylinder. There is a smaller cylinder filled with compressed. Gas Liquid Carbon Dioxide for example a release valve keeps the compressed gas from escaping. When you pull out the safety pin and depressed the operating lever it pushes on an actuator. Rod. The Rod presses the spring mounted valves down to open up the passage to the nozzle the bottom of the waiting. Rod has a sharp point which pierces the gas cylinder release valve the compressed gas escapes applying downward pressure on the fire. Suppressant material this drives the material up the Siphon and out the nozzle the proper way to use the extinguisher is to aim directly at the fuel not the flames and spray in a sweeping motion. There are three main types of extinguisher. A water extinguisher can put out things like burning wood paper or cardboard but it doesn't work well on electrical fires or fires involving inflammable liquids in an electrical fire. Water may conduct the current. Which could electrocute you. Water will only spread an inflammable liquid making the fire worse. Then there's the carbon dioxide extinguisher the co two is kept in a pressurized liquid form when the container is opened the co two forms. A gas this gas is heavier than oxygen so it depletes the oxygen surrounding the fuel. The extinguisher is common in restaurants because it won't contaminate cooking equipment or food. The most popular extinguisher material is the dry chemical extinguisher. These cylinders contain foam or powder typically made of sodium by carbonate also known as Baking Soda Potassium or mono ammonium phosphate. Baking Soda starts to decompose at only one hundred and fifty eight degrees Fahrenheit or seventy Celsius and when it decomposes it releases. Co Two the CO two along with the installation of the foam smothers. Fire the best way to tell which fire extinguisher you have. And which fires is best suited to fight is to look at the rating? All fire extinguishers have an A. B. or C. rating a class. A fire extinguisher works best against fires involving paper. Wood plastic and textiles a class. B Fire Extinguisher can put out flammable liquid fires. You know things like cooking oil gasoline paint or oil and a class. C Extinguisher is your go to for live electrical fires. Each extinguisher will have a number by the letter indicating the size of the fire that it can tackle but please be careful. Most fire extinguishers contain a small amount of suppressant. You can use it up in seconds. That's why they're only effective on relatively small fires to put out a big fire. You need more equipment like a fire engine as well as trained professionals but for the blazes that can pop up in your house. A fire extinguisher can be a lifesaver. Today's episode was written by Ben Bullen and produced by Tyler. Clang for more on this and lots of other topics visit has two forks dot com. Green stuff is production of radio for more podcasts. From iheartradio fits the iheartradio APP apple podcasts. Or wherever you listen to your favorite shows hi. I'm Laura Vendor Kim. I'm the host of the before breakfast. Podcast and the author of several time management books. I'm also the host of hurt media's newest podcast the new corner office in this show we share strategies for thriving in the new world of work. One where the location and ours are more flexible than in the past. Listen over that First Cup of coffee and I promise you'll learn something useful. Listen to the new corner office. Every weekday on the iheartradio APP apple podcasts. Or wherever you get your podcasts.