🔍 Key Concepts

• 46 CFR regulations for tank vessels and cargo definitions • Difference between flammable liquids and combustible liquids in U.S. maritime regulations • How flash point temperature is used to classify liquid cargoes

💭 Think About

• Look at which answer choice actually mentions the temperature at which a liquid gives off enough vapor to ignite, and compare that idea with your memory of the regulatory definition of a flammable liquid. • Ask yourself: in the regulations, are flammable liquids defined by flash point, by vapor pressure, or by sustained combustion? Which of these is actually used for tank vessel cargo classification? • Think about how 80°F (27°C) relates to the common cutoff temperature used in regulations to separate flammable from combustible liquids.

✅ Before You Answer

• Verify which option correctly connects flash point (not sustained combustion) with the term flammable liquid. • Check if Reid vapor pressure is really used to define flammable vs. combustible, or if it’s used for a different cargo classification. • Confirm the temperature threshold used in 46 CFR to distinguish flammable liquids from combustible liquids and see which choice best matches that regulatory cutoff.