When an aircraft is refueling, the 362AF-8 hydrant control valve opens by using the?

The correct choice indicates that the 362AF-8 hydrant control valve opens using a pneumatic deadman system. In the context of aircraft refueling, a pneumatic deadman serves as a safety mechanism. It requires a continuous pressure from an operator to keep the valve in the open position. If the operator releases the pressure, the valve automatically closes, preventing any accidental fuel spills or releases. This safety feature is critical, especially in high-stakes scenarios such as aircraft refueling where the risk of fire and environmental hazards is significant.

While other systems like hydraulic deadman and pneumatic systems can have specific applications, the pneumatic deadman is widely recognized in aviation fuel transfer systems for its reliability and safety, ensuring that the hydrant control valve operates effectively while prioritizing safety throughout the refueling process.