What is the 'dead man' fueling valve used for in fueling operations?

• A. The fueling control valve that shall be held open by hand during fueling
• B. A safety valve that acts automatically
• C. An emergency shutoff valve located elsewhere
• D. A valve that should be closed during fueling

Answer: (A)

During fueling, the dead-man valve is a manual control that must be held open by the person fueling. It acts as a safety interlock, allowing fuel to flow only while the operator is actively keeping the control pressed. If the operator releases it, the valve closes and fueling stops, which helps prevent spills, overfills, or a fire near the fueling area. This isn’t an automatic safety valve, nor an emergency shutoff located elsewhere, and it isn’t supposed to be kept closed during fueling—the flow is controlled by keeping the valve open by hand.