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TASCO Exit Exam • Set 5 Question 25 of 30

Acidic solutions are formed in cargo tanks of tankers

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Direct Answer

Option C: when sulphur compounds in oil cargoes react with water

When sulfur compounds inherent in crude oil react with moisture or water introduced into the cargo tanks, they form acidic solutions (like sulfuric acid), which significantly increase the rate of corrosion of the tank structure.

All Options

A
when sulphur compounds in oil cargoes react with hydrocarbon gas
B
when sulphur compounds in oil cargoes react with oxygen
C
when sulphur compounds in oil cargoes react with water (Correct Answer)
D
when sulphur compounds in oil cargoes react with chemicals

Detailed Explanation & Context

When sulfur compounds inherent in crude oil react with moisture or water introduced into the cargo tanks, they form acidic solutions (like sulfuric acid), which significantly increase the rate of corrosion of the tank structure.

Relevant Framework: STCW 2010 Manila Amendments • DG Shipping E-Learning & Exit Exam Standards • Advanced Training for Oil Tanker Cargo Operations (TASCO).

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