To which pumps does the motive flow line route fuel?

The motive flow line is designed to route fuel to both the primary jet pump and the transfer jet pumps in the T-6 aircraft’s fuel system. This configuration allows for effective fuel management by ensuring that fuel is directed to multiple locations where it can be utilized efficiently for engine operation.

The primary jet pump plays a crucial role in maintaining fuel flow from the wing tanks to the engine, while the transfer jet pumps help move fuel between different tanks within the system, especially during flight maneuvers where fuel levels may vary. By routing fuel to both the primary and transfer jet pumps, the motive flow line ensures that the system has adequate fuel delivery and can respond effectively to the demands of flight.

In contrast, the other options either limit the routing of fuel to a single point or do not encompass the necessary components that are part of the fuel system's operational requirements. This inclusion of multiple pumps in the correct answer underscores the importance of redundancy and flexibility in the fuel system design.