🔍 Key Concepts

• Flashpoint definitions for flammable vs combustible liquids • Typical flashpoint ranges for common petroleum products like gasoline, lube oil, and benzene • Difference between gases, flammable liquids, and combustible liquids in marine safety rules

💭 Think About

• Which of the choices is normally a GAS at normal temperature and pressure, and therefore not a liquid? • Which listed liquids are known to ignite very easily at low temperatures (very low flashpoint) and are therefore considered flammable rather than combustible? • Which option is a heavier petroleum product with a higher flashpoint, meaning it needs more heat before it gives off enough vapor to ignite?

✅ Before You Answer

• Identify which substance is a liquid at room temperature under normal conditions • Recall that flammable liquids have a lower flashpoint than combustible liquids • Eliminate any choice that is commonly handled as a gas or as a highly volatile flammable liquid, not as a combustible liquid