Final answer:
In the event of an electrical power loss, wing anti-ice valves on an aircraft are designed to fail-safe to the closed position to prevent inadvertent operation and conserve resources.
Step-by-step explanation:
When electrical power is lost in an aircraft, the wing anti-ice valves are typically designed to fail-safe to the closed position. This is a standard safety measure to prevent the inadvertent operation of the anti-icing system, which could lead to system malfunctions or unnecessary depletion of resources, such as bleed air, when the power is off.
The systems' design ensures that the icing protection is not activated without proper electrical control signals, which only occur when the aircraft systems detect the need for anti-icing measures and power is available to operate the anti-ice systems safely and effectively.