Questions and Answers
What is the benefit of Class A foam?
Which type of foam contains a surface-active agent that produces a fast-spreading film?
Class B foam is used for which type of fire?
How does foam extinguish flammable liquid fires?
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Which type of nozzle is used most commonly with fluoroprotein foam?
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Which type of foam is particularly well suited for gasoline spills?
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Which type of nozzle is most commonly used to apply aqueous film-forming foam?
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To batch mix 3 percent foam into a 500 gallon water tank, how much foam concentrate should be added to the tank?
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Which device mixes foam concentrate in the water stream in the proper percentage?
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Which type of foam is effective on polar solvents?
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What is the correct operating pressure for an in-line foam educator?
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Adding foam concentrate to a fire apparatus tank is called ____.
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Which type of foam is made from animal by-products?
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What is high-expansion foam particularly used for?
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The low surface tension of Class A foam affects its extinguishing properties by ________.
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Which foam application method is best for a pool of flammable liquid on open ground?
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Which foam application method is best for an open-top storage tank fire?
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Study Notes
Class A Foam
- Reduces surface tension of water, enhancing water's ability to penetrate and suppress fires.
Fluoroprotein Foam
- Contains surface-active agents that create a fast-spreading film, effective on flammable liquid fires.
Class B Foam
- Specifically designed for flammable liquid fires, providing effective suppression in incidents involving such materials.
Foam Mechanism
- Extinguishes flammable liquid fires by separating the fuel from the flames, preventing re-ignition.
Nozzle Types
- Aerating Nozzle: Commonly used with fluoroprotein foam for effective dispersal.
- Adjustable Fog Nozzle: Most effective for applying aqueous film-forming foam.
Aqueous Film-Forming Foam
- Best suited for gasoline spills, providing rapid coverage and suppression.
Mixing Foam
- To achieve a 3% foam solution in a 500-gallon tank, 15 gallons of foam concentrate is required.
Foam Mixing Devices
- Proportioner mixes foam concentrate with water in the correct ratios, ensuring effective application.
Alcohol Resistant Foam
- Effective on polar solvents, critical in combating fires involving complex chemical compositions.
In-line Foam Educator Pressure
- Operates best at 200 psi, ensuring optimal mixing and delivery of foam.
Batch Mixing
- The process of adding foam concentrate to a fire apparatus, essential for maintaining foam supply during operations.
Protein Foam
- Made from animal by-products, highlighting the natural origins of some foam types.
High-Expansion Foam
- Particularly useful for flooding large enclosed areas, providing rapid suppression in extensive spaces.
Low Surface Tension Impact
- Allows deeper water penetration into fuels, enhancing extinguishing effectiveness of Class A foam.
Foam Application Methods
- Sweep (Roll-On): Best for flammable liquid pools on open ground, laying a blanket of foam to suppress fire.
- Bank Shot (Bank-Down): Most effective for fires in open-top storage tanks, allowing foam to flow onto the fuel surface.
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Description
Test your knowledge with these flashcards from FF2 Chapter 17. This quiz focuses on the properties and benefits of various types of fire-fighting foams. Enhance your understanding of fire safety equipment and techniques.
