Cross-feeding refers to engines receiving fuel from which of the following?

• A. Engines receive fuel from other tanks
• B. Cross-feed is used to fuel the engines
• C. Fuel is pumped from the ground to the aircraft
• D. Venting fuel to the atmosphere is performed during cross-feed

Answer: (A)

Cross-feeding means supplying an engine with fuel drawn from a different tank than its own. In multi-tank aircraft, each engine usually draws from its dedicated main tank, but a cross-feed line and valve allow fuel to be routed from other tanks to that engine’s feed line when needed—such as to balance fuel, handle a low tank, or keep both engines running if one tank is low or inoperative. This is why the correct description is engines receiving fuel from other tanks.

The other statements don’t fit because cross-feed is not about refueling from the ground, isn’t about venting fuel to the atmosphere, and isn’t simply a general description of fueling engines without specifying that the source is another tank.