Question 4693 Deck General

The correct answer is C) plating. Stiffeners are typically attached to the plating of a bulkhead on a Mobile Offshore Drilling Unit (MODU) to provide additional reinforcement and resist the fluid head pressure. The plating is the primary structural component that needs to be stiffened, as it is the surface that directly experiences the fluid pressure. Attaching stiffeners to the plating helps distribute the load and prevent deformation or failure of the bulkhead. The other options are incorrect because brackets and penetrations are not the primary structural components that require stiffening, and framing, while important, is not the specific component that stiffeners are attached to in this case.