OSHA 30 Hour Construction Program Practice Test

What classification is given to fires involving flammable liquids?

1. Class B

2. Class A

3. Class C

4. Class D

The correct answer is: Class B

Fires involving flammable liquids are classified as Class B fires. This classification is specifically designated for fires that involve combustible liquids, such as gasoline, oil, and solvents. Class B fires require special fire suppression methods because traditional water extinguishing methods are ineffective and could exacerbate the problem by spreading the flammable liquid. The appropriate extinguishing agents for Class B fires typically include foam, dry chemical, or carbon dioxide extinguishers, which work to smother the flames or interrupt the chemical reaction. Understanding this classification is crucial for safety protocols and fire response strategies in construction and industrial settings, where flammable liquids are often present.