What is foaming agent in fire extinguisher?
FOAM: A fire fighting foam is simply a stable mass of small air-filled bubbles, which have a lower density than oil, gasoline or water. Foam is made up of three ingredients - water, foam concentrate and air. When mixed in the correct proportions, these three ingredients form a homogeneous foam blanket.
What type of foam is Afff?
CHEMGUARD Aqueous Film-Forming Foam Concentrates (AFFF) combine fluoro- and hydrocarbon-surfactant technologies to provide superior fire and vapor suppression for Class B, hydrocarbon fuel fires.
What is AFFF foam used for?
Aqueous Film Forming Foam (AFFF) is a fire suppressant used to extinguish flammable liquid fires such as fuel fires. AFFF is often used in shipboard and shore facility fire suppression systems, fire fighting vehicles, and at fire training facilities.
Is AFFF foam hazardous?
AFFF constitutes a U.S. Occupational Safety and Health Administration hazardous material because of its physical hazards, such as skin and eye irritation. Discharge of wastewater and runoff containing AFFF on land, at sea, or to surface water bodies is also subject to regulation under the Clean Water Act.
Is AFFF foam alcohol resistant?
CHEMGUARD Alcohol Resistant Aqueous Film-Forming Foam Concentrates (AR-AFFF) combine fluoro- and hydrocarbon-surfactant technologies to provide superior fire and vapor suppression for Class B, polar solvent and hydrocarbon fuel fires. The foam blanket blocks oxygen supply to the fuel. ...
Is Afff Class B foam?
Class B Foam (also called AFFF): Used to extinguish Class B materials, which include gasoline, oil, and jet fuel.
How long is AFFF foam good for?
between 20-25 years
Does Class A foam cause cancer?
Chemical-based firefighting foam has been sold for decades because of its effectiveness in extinguishing jet fuel and petroleum fires. However, it may cause various types of cancer — most notably kidney, testicular, and pancreatic cancer — in firefighters who were regularly exposed to the foam.
Why do firefighters use foam instead of water?
Class A foams are used to lessen the surface tension of water, which improves the wetting and saturation of water used to fight Class A fires, which are fueled by ordinary combustibles.
What is alcohol resistant foam?
Aqueous film forming foam - Alcohol resistant concentrate. The acronyme AFFF ARC are often found in different forms such as AFFF-AR or AR-AFFF and are also known as "alcohol foam", "alcohol resistant foam" or "polar solvent foam".
What does class A foam do?
Class A Foam is specially formulated to make water more effective for firefighting. The surfactants in Class A foam significantly reduce water's surface tension and, when mixed with air, create a superior foam blanket that surrounds fuels with a thick layer of water.
What is the difference between Class A and B foam?
The basic difference is how the foams react to carbon: Class A attracts it; Class B repels it. As a carbon-loving solution, Class A foam soaks into solid, combustible materials by breaking down the surface tension of the water. ... Class B foam, on the other hand, repels carbon.
Which is an advantage of compressed air foam?
Because foam is a more efficient extinguishing agent than water, it allows firefighters to extinguish the fire quicker, which decreases their exposure time. Second, the high energy of a CAF stream provides a longer reach, allowing firefighters to operate farther away from the incident in a safer location.
Which type of foam proportioner relies on the Venturi effect?
National Foam Proportioners utilize the water flowing through them to produce a venturi effect that induces foam concentrate into the water stream. Line Proportioners are venturi devices that introduce foam concentrate into a flowing stream of water at a controlled proportioning rate.
What are the two basic types of medium and high expansion foam generators?
|Term 4 ways that firefighting foam extinguishes or prevents fire:||Definition separating cooling smothering penetrating|
|Term What are the two types of medium and high expansion foam generators?||Definition Water-aspirating type nozzle // mechanical blower generator|
Which type of foam contains a surface active agent?
Film Forming Fluoroprotein - FFFP: A foam concentrate composed of protein and film forming fluorinated surface-active agents, which makes it capable of forming a water solution film on the surface of a flammable liquid and conferring a fuel shedding property to the finished foam blanket. See also Oleophobic.
Which of the following is determined by the rate at which natural bacteria can degrade foam?
Which factor is important when choosing the appropriate foam proportioner?
Factors to consider in selecting a foam proportioner include solution flow requirements, intended use, and: available water pressure. Which of the following proportioning methods depends on the Venturi Principle to draw foam through a hose connected to the foam concentrate container and into the water stream?
What are Mil Spec concentrates?
ARCTIC™ U.S. TYPE 6 (6%) MIL-SPEC AFFF foam concentrate from SOLBERG® is a synthetic foam concentrate used to effectively extinguish Class B hydrocarbon fuel fires at 6% solution.
Which type of foam proportioner is directly attached to the pump panel outlet or connected at some point in the hose lay?
The in-line eductor is the most common type of foam proportioner used in the fire service (Figure 3). This eductor is designed to be either directly attached to the pump panel discharge or connected at some point in the hose lay.
Why are propane tanks an extreme risk to firefighters quizlet?
Why are propane tanks an extreme risk to firefighters? The tanks will explode when sufficiently heated.
Which is an advantage of compressed air foam quizlet?
Compressed air foam provides quicker knockdown times and minimizes FF exposure to immediately dangerous to life and health (IDLH) environments. The increased drain time of the CAFS allows water to be used more effectively while fire fighting. Due to its high-surface tension, water tends to run off of surfaces.
What is a disadvantage of using fog nozzles to apply fire fighting foam?
What is a disadvantage of using fog nozzles to apply fire fighting foam? Operator error is more likely to produce lower quality foam.
Which type of foam is the most popular synthetic foam?
What is necessary when applying fire fighting foam?
foam solution and water must be premixed and allowed to rest before application. foam concentrate, water, and air must be mixed in the correct ratio. What is likely to cause poor quality fire fighting foam to be produced?
What should firefighters do if the fire begins to spread uncontrollably when they are applying foam?
What should firefighters do if the fire begins to spread uncontrollably when they are applying foam? At an incident involving flammable liquids or gases, firefighters should immediately retreat to a safe location: if the sound of escaping gas starts to get louder.
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- Is Class A foam AFFF?
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- What is a foam blowing agent?
- What type of foam system injects air and foam into a fire pump?
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