When transferring flammable liquids, what precaution prevents static electricity buildup between containers?

• A. Bonding wire between the containers
• B. Grounding strap between the containers
• C. Vent vapors to the atmosphere
• D. Refrigerate the containers

Answer: (A)

Static electricity from liquid flow can create a spark risk when transferring flammable liquids. Bonding the containers with a wire ties their conductive surfaces together, equalizing their electrical potentials so there’s no sudden voltage difference that could arc as connections are made or broken. This direct conductive path between the containers prevents a charge buildup that could ignite vapors. Grounding to earth helps dissipate charge but doesn’t ensure the containers share the same potential, so bonding between them is the essential precaution. Venting vapors and refrigeration don’t address the electrical discharge risk between containers.