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Answer :
Final answer:
Dry chemical extinguisher is the recommended fire extinguisher for gasoline fires in confined spaces without respiratory protection, hence correct answer is 3) Dry chemical extinguisher.
Explanation:
Dry chemical extinguishers, specifically those labeled as ABC extinguishers, are effective for suppressing fires involving flammable liquids, such as gasoline. They contain a dry chemical powder that works by interrupting the chemical reaction of the fire. It is suitable for Class B (flammable liquids) and Class C (electrical) fires.
In this scenario, a dry chemical extinguisher is preferable over water (APW) or carbon dioxide extinguishers because it can be used on flammable liquid fires without the potential risk of spreading the fire due to the nature of the extinguishing agent. Additionally, it does not displace oxygen like carbon dioxide, which is crucial in a confined space. Class K dry-type extinguishers are designed for fires involving cooking oils and fats, so they are not the most appropriate choice for a gasoline fire.
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