Pyrophoric oxidation occurs when loading:
Direct Answer
Option B: Sour crude oils
Pyrophoric oxidation, specifically of iron sulphides, occurs when tanks that have carried sour crude oils are exposed to air. These sulphides, formed from hydrogen sulphide in the cargo, react exothermically with oxygen, posing a significant fire hazard as detailed in ISGOTT.
All Options
Detailed Explanation & Context
Pyrophoric oxidation, specifically of iron sulphides, occurs when tanks that have carried sour crude oils are exposed to air. These sulphides, formed from hydrogen sulphide in the cargo, react exothermically with oxygen, posing a significant fire hazard as detailed in ISGOTT.
Relevant Framework: STCW 2010 Manila Amendments • DG Shipping E-Learning & Exit Exam Standards • Advanced Training for Chemical Tanker Cargo Operations (CHEMCO).
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