CHEMCO Exit Exam • Set 4 Question 28 of 30
Back flow of inert gas is prevented by:
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Direct Answer
Option B: The deck water seal
The deck water seal is a critical safety device in inert gas systems. It provides a liquid barrier that prevents the backflow of flammable cargo vapors into the inert gas generating plant or the ship's atmosphere, as mandated by ISGOTT.
All Options
A
An isolating valve
B
The deck water seal
(Correct Answer)
C
A valve provided in the scrubber
D
The deck mechanical non-return valve
Detailed Explanation & Context
The deck water seal is a critical safety device in inert gas systems. It provides a liquid barrier that prevents the backflow of flammable cargo vapors into the inert gas generating plant or the ship's atmosphere, as mandated by 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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