During mobile fueling, in what order should grounding wires be removed?

• A. In reverse order of grounding
• B. In order of connection
• C. All at once
• D. From the closest to the nozzle

Answer: (A)

During mobile fueling, the important protection is maintaining a continuous ground path to dissipate any static electricity that can build up as fuel flows. Grounding wires create that safe path, and removing them in reverse order of how they were connected preserves that path as long as possible. If you take off the first-connected ground first, you risk breaking the grounding path too soon, which can leave the system momentarily ungrounded and increase the chance of a static discharge or spark during disconnection. So, you start with the grounding connection that was connected last, and work backward to the first one that was connected. This approach minimizes the risk of static ignition and keeps the fueling operation safer until everything is fully disconnected.