Questions and Answers
Portable fire extinguishers are often suitable for more than one class of fire.
True
Class C extinguisher agents are capable of conducting electricity.
False
A portable fire extinguisher should be used only for the fire type or types of which it is intended.
True
Water in water-based agents cannot be used on a Class C fire until the electricity has been shut off.
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When using an Aqueous film forming foam (AFFF) extinguisher, the operator should apply foam directly on the fuel.
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Clean agent extinguishers should not be used to extinguish fires in energized electrical equipment.
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Dry chemical agent application may result in a cloud of airborne particulates that may reduce visibility and create respiratory problems.
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Any dry powder extinguishing agent can be used on any combustion metal.
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Dry powder extinguishing agent should be applied gently to avoid breaking the crust that may form over burning metal.
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When using a portable fire extinguisher, the operator should approach a fire from the leeward side.
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Study Notes
Portable Fire Extinguishers
- Portable fire extinguishers are versatile and can be suitable for multiple classes of fire.
- Important to use extinguishers only for the fire types they are designed to address.
Class C Extinguishers
- Class C extinguisher agents do not conduct electricity, making them safe for use on electrical fires.
- Water-based agents, including water itself, should not be used on Class C fires unless the electricity is shut off first.
Aqueous Film Forming Foam (AFFF)
- AFFF extinguishers require the operator to apply foam gently, avoiding direct application; it should rain down or deflect off objects.
Clean Agent Extinguishers
- Clean agent extinguishers are safe for use on energized electrical equipment as they are nonconductive.
Dry Chemical Agents
- The application of dry chemical agents can reduce visibility due to airborne particulates and may pose respiratory hazards.
- Not all dry powder extinguishing agents are suitable for all types of combustible metals; specific agents are needed for specific metals.
- The application of dry powder should be done carefully to maintain any crust that forms on burning metal, preventing further ignition.
Fire Approach Techniques
- Operators should approach fires from the upwind side to ensure safety, keeping the wind at their back.
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Description
Test your knowledge of fire extinguisher safety and classifications with these true/false flashcards from Chapter 6, Section B of Essentials of Fire Fighting. Learn about the types of extinguishers and their appropriate uses to enhance your firefighting skills.
