Aviation Boatswain’s Mate – Fuels (ABF) Practice Exam

Freezing point is the temperature at which a liquid becomes a solid. At this boundary, the molecules lose enough energy to arrange into a solid structure, and the liquid begins to solidify. For aviation fuels, this is the point where waxy components start to crystallize and the fuel can begin to lose flow. It is not the temperature where a liquid vaporizes or boils (that’s the boiling point), and it’s more than just the moment solids first appear in the liquid—freezing point is the temperature at which the liquid transitions into a solid phase.