What term is used for the fuel that remains in the tanks and lines after draining?

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Prepare for the ASA Aviation Maintenance Technician General Test. Utilize flashcards and multiple-choice questions with hints and explanations. Ace your exam!

Multiple Choice

What term is used for the fuel that remains in the tanks and lines after draining?

Explanation:
Residual fuel is the fuel that remains in the tanks and lines after draining. Even after draining, small amounts cling to walls, stay in small-diameter lines, and sit in sumps and cavities where gravity and flow can’t pull every drop out. This leftover isn’t intended for flight use and isn’t counted as usable fuel, though it’s still flammable and must be handled safely. Taxi fuel and takeoff fuel describe planned amounts for specific flight phases, not leftovers from draining, while usable fuel refers to the portion that can actually be consumed in flight.

Residual fuel is the fuel that remains in the tanks and lines after draining. Even after draining, small amounts cling to walls, stay in small-diameter lines, and sit in sumps and cavities where gravity and flow can’t pull every drop out. This leftover isn’t intended for flight use and isn’t counted as usable fuel, though it’s still flammable and must be handled safely. Taxi fuel and takeoff fuel describe planned amounts for specific flight phases, not leftovers from draining, while usable fuel refers to the portion that can actually be consumed in flight.

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