CHEMCO Exit Exam • Set 1 Question 3 of 30
What test is performed on tank bulkhead surfaces to detect microscopic hydrocarbon residues before loading sensitive chemical cargoes?
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Direct Answer
Option D: Wall Wash Test (WWT)
The Wall Wash Test (WWT) is a critical procedure outlined in the P&A Manual. It uses specific solvents to detect and quantify microscopic residues on tank surfaces, ensuring tanks are clean for sensitive cargoes.
All Options
A
Hydrostatic pressure test
B
Magnetic particle test
C
Ultrasonic thickness test
D
Wall Wash Test (WWT)
(Correct Answer)
Detailed Explanation & Context
The Wall Wash Test (WWT) is a critical procedure outlined in the P&A Manual. It uses specific solvents to detect and quantify microscopic residues on tank surfaces, ensuring tanks are clean for sensitive cargoes.
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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