Question 4645 Deck General

The correct answer is C) stiffeners. Reinforcing frames attached to a bulkhead on a Mobile Offshore Drilling Unit (MODU) are called stiffeners. Stiffeners are structural members that are used to reinforce and strengthen bulkheads, decks, and other surfaces on a vessel to prevent buckling or deformation under loads. The other answer choices are incorrect because: A) Brackets are used to connect and support other structural members, but they are not the reinforcing frames themselves. B) Intercostals are transverse framing members that run between longitudinal members, not reinforcing frames attached to a bulkhead. D) Side longitudinals are longitudinal framing members running along the sides of the vessel, not the reinforcing frames on a bulkhead.