If you’ve ever driven behind a fuel tanker, you’ve probably noticed a small metal chain dragging along the asphalt. Most people never give it a second thought. Some assume it’s outdated, others think it’s there to steady the truck — but the truth is far more important.
That little chain is a lifesaver.
Tanker trucks, especially those hauling gasoline, diesel, or industrial chemicals, are built with safety as their first priority. As the truck rolls down the highway, the liquid inside is constantly sloshing and shifting, creating friction. Combine that with the truck’s tires rubbing against the road, and you get one dangerous byproduct: static electricity.....
