Final answer:
The Wing and Engine Anti-Ice valves fail in the position that they were last set when electrical power is lost on an airplane.
Step-by-step explanation:
When electrical power is lost on an airplane, the Wing and Engine Anti-Ice valves fail in the position that they were last set. This means that if the valves were open before the power loss, they will remain open. If the valves were closed, they will stay in the closed position.
This is because the Wing and Engine Anti-Ice valves are controlled by electric motors that require electrical power to operate. When the power is lost, the motors stop working and the valves stay in their current position.
For example, if the Wing and Engine Anti-Ice valves were open when the power was lost, ice protection would still be active even without electrical power. On the other hand, if the valves were closed, ice protection would not be active.