Questions and Answers
What are the components of the Fire Tetrahedron?
Heat, fuel, oxygen, chemical chain reaction
Which of the following materials are involved in a Class A Fire? (Select all that apply)
How are Class A Fires extinguished?
With water or AFFF
What type of materials does a Class B Fire involve?
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How are Class B Fires extinguished?
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What should be done with a Class C Fire?
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What dangers are associated with Class D Fires?
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Which combustible metals are involved in Class D Fires? (Select all that apply)
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Study Notes
Fire Tetrahedron
- Composed of four essential elements: heat, fuel, oxygen, and chemical chain reaction.
- All elements must be present for a fire to ignite and sustain.
Class A Fire
- Involves ordinary combustibles: wood, cloth, textiles, and paper products.
- Extinction methods include water delivered in a straight stream or fog pattern.
- Deep-seated fires may require aqueous film forming foam (AFFF) for effective suppression.
Class B Fire
- Pertains to flammable liquids like gasoline, diesel, jet fuels, and various oils.
- Extinguished with AFFF or potassium bicarbonate (PKP).
- Must be cautious with flammable gases; never extinguish without securing the gas flow first.
Class C Fire
- Involves energized electrical fires; must be treated with care.
- Use Carbon Dioxide or water spray, maintaining a safe distance.
- Best practice is to de-energize the electrical source and manage as a Class A fire if safe to do so.
Class D Fire
- Concerns combustible metals, including magnesium and titanium.
- Risk of small explosions when water is applied; water should not be used for suppression.
- Best approach is disposal overboard or special dry powder extinguishing agents.
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Description
This quiz focuses on the essential concepts and definitions related to the four classes of fire, including the Fire Tetrahedron and specifics for Class A and Class B fires. Prepare to enhance your knowledge about fire safety and extinguishing methods with these informative flashcards.
