Which sensor controls the opening of the transfer valves?

Which sensor controls the opening of the transfer valves?

• A. Tank low level sensors
• B. Altitude sensors
• C. Temperature sensors
• D. Engine vibration sensors

Answer: (A)

Fuel balancing relies on the fuel quantity sensing network, and the transfer valves respond to what the tanks report. When a tank’s fuel level falls below its preset low limit, the low-level sensor in that tank sends a signal that opens the transfer valves, allowing fuel from another tank to flow in. This automatic transfer keeps tanks from emptying and helps maintain the correct fuel distribution and center of gravity. Other sensors—altitude, temperature, and engine vibration—monitor different parameters and do not control the transfer valves, so they don’t drive this fuel-balancing action.

Fuel balancing relies on the fuel quantity sensing network, and the transfer valves respond to what the tanks report. When a tank’s fuel level falls below its preset low limit, the low-level sensor in that tank sends a signal that opens the transfer valves, allowing fuel from another tank to flow in. This automatic transfer keeps tanks from emptying and helps maintain the correct fuel distribution and center of gravity. Other sensors—altitude, temperature, and engine vibration—monitor different parameters and do not control the transfer valves, so they don’t drive this fuel-balancing action.