🔍 Key Concepts

• Difference between flash point and fire point in fuel testing • Meaning of ignition temperature compared to the point where vapor just flashes briefly • Why safety regulations care about the lowest temperature at which flammable vapor is produced

💭 Think About

• Ask yourself: at which temperature does the oil only momentarily flash when exposed to a flame, and at which temperature will it continue to burn? • Which term is used in regulations and safety data sheets (SDS) to describe how easily a fuel will start to burn from an external flame source? • Which of these terms refers to the fuel itself self-igniting without an external flame source?

✅ Before You Answer

• Identify which term means the lowest temperature where vapor forms that can ignite briefly • Separate the idea of momentary flash from sustained burning • Remember that ignition temperature involves self‑ignition without an external flame source—verify which choice matches that concept