Examples of flammable and combustible liquids frequently encountered at hazmat incidents are ______ and ______ fuel.

• A. Water and ethanol
• B. Gasoline and diesel
• C. Acetone and toluene
• D. Methanol and kerosene

Answer: (B)

Understanding the distinction between flammable and combustible liquids is key here. Flammable liquids have flash points below 100°F (37.8°C), while combustible liquids have flash points at or above 100°F. Gasoline fits the flammable category with a flash point far below that threshold, whereas diesel fits the combustible category with its higher flash point. This pairing—gasoline and diesel fuel—covers the two main fuel types you’re most likely to encounter at hazmat incidents, since these are the primary fuels transported and spilled in many real-world scenarios. The other options either include non-flammable substances (like water) or mix solvents with fuels in a way that doesn’t as clearly illustrate the standard fuel examples you’d expect at hazmat scenes.