Which statement best describes how transfer valves operate?

Which statement best describes how transfer valves operate?

• A. They are automatically controlled by tank low level sensors, requiring no pilot input
• B. They require manual operation by the flight crew
• C. They operate only during refueling
• D. They are powered by an independent power source

Answer: (A)

Transfer valves are controlled by the fuel management system, not by the pilot. They respond to signals from tank level sensors and the fuel balancing logic to move fuel as needed to keep the aircraft balanced and within safe limits. In normal operation, this happens automatically, so no direct cockpit input is required from the crew for routine transfers. The valves are not powered by a separate, independent power source; they operate as part of the aircraft’s electrical/fuel control system with automatic commands. They don’t operate only during refueling, since ongoing balancing during flight helps maintain the correct fuel distribution.

Transfer valves are controlled by the fuel management system, not by the pilot. They respond to signals from tank level sensors and the fuel balancing logic to move fuel as needed to keep the aircraft balanced and within safe limits. In normal operation, this happens automatically, so no direct cockpit input is required from the crew for routine transfers. The valves are not powered by a separate, independent power source; they operate as part of the aircraft’s electrical/fuel control system with automatic commands. They don’t operate only during refueling, since ongoing balancing during flight helps maintain the correct fuel distribution.