OCTCO/OCTF Exit Exam • Set 4 Question 20 of 30

Pyrophoric oxidation occurs when loading:

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Direct Answer

Option D: Chemical cargoes

Pyrophoric iron sulphide oxidation occurs when pyrophoric scale (formed by hydrogen sulphide reacting with rust in low-oxygen conditions) is exposed to oxygen when loading or ventilating tanks.

All Options

Light crude oils

Sour crude oils

Refined products

Chemical cargoes (Correct Answer)

Detailed Explanation & Context

Pyrophoric iron sulphide oxidation occurs when pyrophoric scale (formed by hydrogen sulphide reacting with rust in low-oxygen conditions) is exposed to oxygen when loading or ventilating tanks.

Relevant Framework: STCW 2010 Manila Amendments • DG Shipping E-Learning & Exit Exam Standards • Oil and Chemical Tanker Cargo Operations (OCTCO/OCTF).

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