Never Realized This: Why Tanker Trucks Have That Extra Chain Hanging at the Back

The Purpose of the Extra Chain
The chain acts as a grounding device. As the truck moves, friction between the liquid inside and the tank, as well as the truck’s movement over the road, generates static electricity. With flammable liquids like fuel, even a tiny spark can cause a fire or explosion.

The chain drags along the ground, giving the …

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