How long does the weighted rod in the pickup valve provide minimum fuel regardless of orientation?

The correct value for how long the weighted rod in the pickup valve provides minimum fuel regardless of orientation is indeed 60 seconds. This design feature ensures that in the event of a momentary loss of fuel due to changes in the aircraft's orientation, such as during maneuvers or certain flight attitudes, the weighted rod allows for a stable fuel supply for a limited period of time.

This 60-second period is critical for maintaining engine operation during those transitional phases when the fuel might otherwise be temporarily unavailable. It allows pilots to manage their energy and execute maneuvers without immediate concern for fuel starvation.

Other options would not reflect the designed effectiveness of the system. The rationale behind the 60-second duration corresponds to operational considerations, permitting pilots adequate time to address any configuration changes or to stabilize their flight path following an abrupt movement.