Question 4651 Deck General

The correct answer is B) hydrostatic pressure. Bulkheads that form part of the tanks on a Mobile Offshore Drilling Unit (MODU) must be stiffened to withstand the hydrostatic pressure exerted by the liquid contents of the tank. This is a key structural requirement to ensure the integrity and safety of the MODU's tank system. The other options are incorrect because they do not directly relate to the primary design consideration for tank bulkheads on a MODU. Deck loads, dynamic forces, and over-pressurization may be factors in the overall MODU design, but hydrostatic pressure is the critical consideration for the stiffening of the tank bulkheads.