Which class of fire involves flammable liquids?

• A. Class A
• B. Class B
• C. Class C
• D. Class D

Answer: (B)

The correct answer is B, and Class B fires specifically involve flammable liquids and gases. This classification includes materials such as gasoline, oil, paints, and solvents that can ignite and spread rapidly. Understanding the characteristics of Class B fires is crucial for firefighters as these types of fires require specific extinguishing agents. For example, water is not suitable for extinguishing Class B fires because it can cause the burning liquid to spread, exacerbating the situation. Instead, extinguishing agents like foam, dry chemical, or carbon dioxide are effective for suppressing Class B fires by cutting off the oxygen supply or inhibiting the chemical reactions involved in combustion.

The other classes of fire do not pertain to flammable liquids. Class A fires involve ordinary combustibles such as wood, paper, and cloth. Class C fires are associated with energized electrical equipment, and Class D fires involve combustible metals like magnesium or sodium. Therefore, recognizing the nature of the materials involved in each fire class is key to ensuring effective firefighting strategies.