Answer :
Final answer:
A Pressurized Water Fire Extinguisher is used primarily for Class A fires, which involve ordinary combustibles like wood and paper. It is not effective for Class B, C, D, or K fires. Therefore, the correct answer is Class A.
Explanation:
Understanding PW Fire Extinguishers
A PW (Pressurized Water) Fire Extinguisher is specifically designed for tackling fires involving ordinary combustible materials such as wood, paper, and textiles, categorized under Class A fires.
Classes of Fires
Here's a brief overview of fire classes:
- Class A: Fires involving solid materials like wood and paper.
- Class B: Fires involving flammable liquids like gasoline and oils.
- Class C: Fires involving electrical equipment.
- Class D: Fires involving combustible metals.
- Class K: Fires involving cooking oils and fats.
Given that PW extinguishers work primarily on Class A fires, they should not be used on Class B, C, D, or K fires as they can worsen these types of situations.
Therefore, the answer to the question is:
- Class A.
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