Questions and Answers
Class C fires involve:
Stored-pressure water extinguishers are used on Class _____ fires.
When in position to attack the fire, what is the first step that should be taken when using a portable fire extinguisher?
Class K fires involve:
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A portable fire extinguisher must be labeled with the:
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Which statement about using a portable fire extinguisher is accurate?
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Which statement about using a portable fire extinguisher on an incipient stage fire is accurate?
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_____ is an example of a Class D fuel.
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Which factor should be considered when selecting the appropriate type of extinguisher to use on a given fire?
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Which material is a Class A combustible material?
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Class A portable fire extinguishers are rated from 1-A through 40-A based upon the amount of water and:
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In a(an) _____ extinguisher, compressed air or inert gas within the container forces the agent out of the extinguisher nozzle when the operator presses the handle.
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An empty portable fire extinguisher should be:
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The air-aspirating foam nozzle used with an aqueous film forming foam (AFFF) extinguisher produces:
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Where is a Class K fire likely to be found?
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A _____ extinguisher should be used in areas with highly sensitive computer equipment because it will cause less damage to the equipment than other extinguishers.
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Which extinguisher would be effective for use on a burning puddle of gasoline at a vehicle incident?
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Which is a Class D combustible material?
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Every portable fire extinguisher must...
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Study Notes
Fire Classes and Extinguishers
- Class C Fires involve energized electrical equipment, combustible liquids and gases, regular combustibles like wood, and combustible metals.
- Class A Fires are extinguished using stored-pressure water extinguishers, specifically rated for this class.
- Class K Fires are related to cooking oils and fats.
Portable Fire Extinguisher Usage
- The first step in using a portable fire extinguisher is to pull the pin and break the wire or seal.
- Portable fire extinguishers require labels with letters/symbols showing their class ratings.
- Wind can affect the effectiveness of extinguishing agents, limiting their reach after expulsion.
Safety and Technique
- It’s crucial to operate at a distance to avoid scattering solid fuels and penetrating liquid fuel surfaces.
- One portable extinguisher should be used at a time for liquid fuel fires to enhance safety measures.
Material Classifications
- Class D fuels include combustible materials such as magnesium, which require specific extinguishing agents.
- Class A combustibles consist of organic materials like wood, which need specific types of extinguishers rated from 1-A to 40-A based on their performance in testing.
Extinguisher Types and Features
- Stored-pressure extinguishers utilize compressed air or inert gas to expel the agent when the handle is pressed.
- Aqueous film forming foam (AFFF) extinguishers produce higher quality foam with air-aspirating nozzles, suitable for fighting various fire classes.
Specialized Extinguishers
- Clean agent extinguishers are less damaging to sensitive computer equipment, making them ideal for areas with such technology.
- For gasoline fires specifically, a Aqueous Film Forming Foam (AFFF) extinguisher is the most effective option.
Maintenance and Handling
- An empty fire extinguisher should be laid on its side rather than standing upright or sent back to the manufacturer, indicating readiness for refill or disposal.
Key Environments for Fires
- Class K fires commonly occur in restaurants, highlighting the need for specialized extinguishers in the culinary environment.
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Description
Test your knowledge on fire safety with these flashcards focused on Class C fires and portable fire extinguishers. The quiz covers essential definitions and concepts from Chapter 6 of the 7th edition, helping you prepare for fire safety situations effectively.
