If one side fuel tank is low during flight, how does crossfeed help?

If one side fuel tank is low during flight, how does crossfeed help?

• A. Crossfeed isolates the low tank and prevents fuel flow from the other side.
• B. Fuel can be drawn from the opposite side via crossfeed to balance and feed engines.
• C. Engine will automatically shut down.
• D. Crossfeed is not used.

Answer: (B)

Crossfeed moves fuel between the left and right main tanks, so if one side is low you can draw from the other side to keep both engines supplied. By opening the crossfeed, the engine-driven pumps can pull fuel from the opposite tank, maintaining a steady fuel supply and helping balance the fuel load in the aircraft. This prevents fuel starvation on the engine that’s feeding from the low side and helps keep the aircraft’s weight distribution reasonable. The opposite options don’t fit: crossfeed doesn’t isolate the low tank; it’s used to share fuel. It doesn’t automatically shut down an engine, and it is indeed used when one side is low.

Crossfeed moves fuel between the left and right main tanks, so if one side is low you can draw from the other side to keep both engines supplied. By opening the crossfeed, the engine-driven pumps can pull fuel from the opposite tank, maintaining a steady fuel supply and helping balance the fuel load in the aircraft. This prevents fuel starvation on the engine that’s feeding from the low side and helps keep the aircraft’s weight distribution reasonable.

The opposite options don’t fit: crossfeed doesn’t isolate the low tank; it’s used to share fuel. It doesn’t automatically shut down an engine, and it is indeed used when one side is low.