Which term describes fuel routing to supply an engine from any feasible tank?

• A. Jettison
• B. Hot Refueling
• C. Separation/Isolation
• D. Crossfeeding

Answer: (D)

Crossfeeding describes routing fuel from one or more tanks to an engine, allowing the engine to be fed from any feasible tank. In aircraft with multiple fuel tanks, crossfeed valves and lines let you pull fuel from a different tank than the one normally feeding the engine. This provides redundancy and helps manage fuel balance and supply if the primary tank is unavailable, empty, or if the engine needs to be fed from an alternate source for balance or fault reasons.

Jettison is about dumping fuel overboard, which is unrelated to feeding the engine. Hot refueling involves refueling with the engines running, not about selecting a different tank to feed the engine. Separation/Isolation refers to keeping tanks and their feeds separate to prevent crossflow, not to routing fuel to the engine from any tank.