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CHEMCO Exit Exam • Set 9 Question 16 of 30

Why is it the potential for volumetric losses is greater where COW is performed?

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Direct Answer

Option C: During COW, the cargo is being formed into a high pressure spray and partially atomised

During Crude Oil Washing (COW), the cargo is sprayed at high pressure, creating atomization. Partial atomization means some droplets remain larger, increasing the potential for volumetric losses due to splashing and adherence to tank surfaces, as per ISGOTT guidelines.

All Options

A
During COW, the cargo is being formed into a low pressure spray and completely atomised
B
During COW, the cargo is being formed into a high pressure spray and completely atomised
C
During COW, the cargo is being formed into a high pressure spray and partially atomised (Correct Answer)
D
During COW, the cargo is being formed into a low pressure spray and partially atomised

Detailed Explanation & Context

During Crude Oil Washing (COW), the cargo is sprayed at high pressure, creating atomization. Partial atomization means some droplets remain larger, increasing the potential for volumetric losses due to splashing and adherence to tank surfaces, as per ISGOTT guidelines.

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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