Q1
(a) Sketch the cross-section of a bulk carrier with either deep or shallow double bottom showing the type of framing used.
(b)
(i) Describe the corrosion problems experienced with ballast tanks.
(ii) State how such tanks are protected against extensive corrosion.
Reference Answer
### (a) Cross-Section of a Bulk Carrier A bulk carrier is designed with a single deck, double bottom, hopper side tanks, and topside wing tanks. This configuration creates smooth, self-stowing cargo holds and provides adequate space for segregated ballast. The framing is typically a combination system. **Key Structural Features Shown in the Cross-Section:** * **Double Bottom:** Comprises inner and outer bottom plating. It is longitudinally framed to resist hogging and sagging stresses. The space is used for ballast water and contains solid plate floors (transversely) and longitudinal girders for strength.
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