Which statement is TRUE concerning insulating flanges?

Correct Answer: Option A — They should be inspected and tested periodically to ensure that the insulation is clean and in good condition.

Insulating flanges prevent electrical arcing between the vessel and the shore facility by breaking the metallic continuity of the cargo hose. Per 33 CFR 154, these must be maintained, clean, and tested periodically to ensure their dielectric integrity remains effective in preventing stray current ignition during cargo transfer.