Steamfitter Safety Practice Exam

Can a class B fire be extinguished using a dry chemical fire extinguisher?

Yes, it is effective No, it cannot Only if the fire is small Only with water-based extinguishers

Correct Answer:

Yes, it is effective

Explanation:

A class B fire involves flammable liquids such as gasoline, oil, or solvents. Using a dry chemical fire extinguisher is effective for extinguishing class B fires because these extinguishers typically use agents like sodium bicarbonate or potassium chloride, which work by smothering the fire and interrupting the chemical reaction that fuels it. These agents can quickly suppress flames and prevent re-ignition, making them a suitable choice for handling flammable liquid fires. Understanding the use of different types of extinguishers and their effectiveness on various classes of fires is crucial for maintaining safety in environments where flammable materials are present.

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