Explain why a flammable-materials safety cabinet should be grounded.

• A. To prevent the build-up of a static charge.
• B. To improve ventilation of the cabinet.
• C. To add weight to the cabinet.
• D. To prevent rust on the cabinet.

Answer: (A)

Grounding a flammable-materials safety cabinet is about removing static electricity safely. Static charges can build up on the metal surface when liquids are poured, lids are opened, or containers are moved inside the cabinet. If those charges discharge as a spark in the presence of flammable vapors, they can ignite them. Providing a path to earth lets those charges flow away instead of dumping into a spark, dramatically reducing ignition risk. This is why grounding is a standard safety practice for storing flammable materials. It isn’t about improving ventilation, adding weight, or preventing rust, which do not address the danger of static-induced ignition.