Fires fueled by such substances as gasoline, oil, grease, etc. would be classified as:

Fires fueled by substances like gasoline, oil, and grease are classified as Class B fires. Class B fires involve flammable liquids and gases, which can ignite and produce significant flames due to their volatility. This category includes combustible liquids such as paints, solvents, and petroleum-based products, all of which can spread fires rapidly and require specific fire suppression methods.

To properly extinguish Class B fires, it is crucial to use fire extinguishers labeled for this class, which typically contain foam, dry chemical agents, or CO2. Water is not effective because it can spread the burning liquid and exacerbate the fire.

Understanding the different classes of fires is essential for effective fire prevention and response strategies. Each class has unique characteristics requiring tailored firefighting approaches to prevent hazards safely and efficiently.