Answer:
Explanation:
Fuel tankers and powder tankers should be grounded before removing product to prevent static electricity from building up, which can potentially cause sparks that may ignite flammable vapors or powders. The process of transferring fuel or powder creates friction, which can cause static electricity to accumulate on the tank's surface. When the accumulated charge becomes large enough, it can create a spark, leading to an explosion or fire. By grounding the tanker, any accumulated charge is safely discharged to the ground, minimizing the risk of a hazardous incident.