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A PW (Pressurized Water) Fire Extinguisher may be used on which class(es) of fire(s)?

A. Class A
B. Classes B & C
C. Classes D & K

Answer :

Final answer:

A Pressurized Water fire extinguisher is designed to be used on Class A fires, which involve ordinary combustibles like wood and paper. It is not suitable for Class B or C fires due to the risk of spreading flammable liquids or causing electrical issues. Therefore, option A is the correct answer.


Explanation:

Understanding Pressurized Water Fire Extinguishers


A Pressurized Water (PW) fire extinguisher is primarily used for extinguishing class A fires, which involve ordinary combustibles such as wood, paper, and cloth. Class A fires are best tackled with water because it effectively cools down the burning materials.


To clarify the categories of fire extinguishers:



  • Class A: Ordinary combustibles (wood, paper, cloth)

  • Class B: Flammable liquids (gasoline, oils)

  • Class C: Electrical fires (equipment and wiring)

  • Class D: Combustible metals (magnesium, titanium)

  • Class K: Cooking oils and fats


Using a PW extinguisher on classes B and C can be unsafe, as it may cause the fire to spread, especially with flammable liquids. Class D fires require special extinguishing agents because of the reactive nature of the metals involved, and class K fires necessitate extinguishers specifically designed for cooking oils.


Thus, the correct choice is:



  2. A. Class A


Learn more about Fire Safety here:

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