To reduce the possibility of a fire, you should?

• A. Leave your engine running while refueling
• B. Gently 'drag' the brakes when the vehicle is in motion
• C. Touch the fuel hose nozzle against the filler pipe before filling up with fuel
• D. Drive back to your home terminal immediately if you notice a fuel leak after having taken a rest break

Answer: (C)

Static electricity can build up on you and the vehicle when you refuel, and a spark could ignite fuel vapors. Touching the fuel hose nozzle against the filler pipe before you start filling provides a grounding path, allowing any charge to dissipate safely. This reduces the chance of a spark formed as fuel begins to flow.

Leaving the engine running would create an ignition source while fueling, which is risky. The other actions shown don’t address the ignition risk from static electricity and aren’t effective safety measures for fueling. If you ever notice a fuel leak, the right response is to stop fueling and address the leak before continuing.