What is the purpose of fuel cross-feed in multi-tank systems?

What is the purpose of fuel cross-feed in multi-tank systems?

• A. Balance fuel and prevent engine starvation by allowing transfer between tanks.
• B. Increase fuel pressure through cross connections.
• C. Isolate tanks to prevent any transfer.
• D. Improve fuel density by mixing fuels during transfer.

Answer: (A)

Fuel cross-feed is used to keep the engine fed and to keep fuel distribution balanced across the aircraft’s tanks. The cross-feed line and valve let fuel move from one tank to another or directly to the engine as needed. If one tank runs low or cannot deliver enough fuel, cross-feed allows fuel from another tank to be transferred to the engine, preventing starvation and maintaining a steady fuel supply. It also helps manage the aircraft’s center of gravity by using fuel from whichever tank is most appropriate to keep the weight evenly distributed. This is why it’s about ensuring continuous fuel delivery and balanced load, not about increasing pressure or preventing transfer or mixing fuels for density reasons.

Fuel cross-feed is used to keep the engine fed and to keep fuel distribution balanced across the aircraft’s tanks. The cross-feed line and valve let fuel move from one tank to another or directly to the engine as needed. If one tank runs low or cannot deliver enough fuel, cross-feed allows fuel from another tank to be transferred to the engine, preventing starvation and maintaining a steady fuel supply. It also helps manage the aircraft’s center of gravity by using fuel from whichever tank is most appropriate to keep the weight evenly distributed. This is why it’s about ensuring continuous fuel delivery and balanced load, not about increasing pressure or preventing transfer or mixing fuels for density reasons.