Class 2 (2nd Engineer) SC&S 📅 Jan 2023

Exam Question

(a) Sketch the cross-section of a bulk carrier with either deep or shallow double bottom showing the type of framing used

(b) Describe the corrosion problems experienced with ballast tanks

Reference Answer

(a) Mid-ship section of bulk carrier:
(b) (i) Corrosion problems in ballast tanks are significant and arise due to various factors:
Galvanic corrosion occurs due to the interaction between dissimilar metals, accelerated by the seawater environment and differential aeration.
Sulphate-reducing bacteria in river mud can cause localized pitting, leading to penetration of the bottom shell.

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