GASCO Exit Exam • Set 1 Question 28 of 30
What is the function of the secondary barrier in an LNG containment system?
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Direct Answer
Option D: Contain cargo leakage for a specified period if the primary barrier fails
Under the IGC Code, a secondary barrier prevents cold liquid reaching the ship hull structure if the primary barrier leaks.
All Options
A
Prevent seawater entry into ballast tanks
B
Provide structural strength to the main deck
C
Hold engine exhaust gas
D
Contain cargo leakage for a specified period if the primary barrier fails
(Correct Answer)
Detailed Explanation & Context
Under the IGC Code, a secondary barrier prevents cold liquid reaching the ship hull structure if the primary barrier leaks.
Relevant Framework: STCW 2010 Manila Amendments • DG Shipping E-Learning & Exit Exam Standards • Advanced Training for Liquefied Gas Tanker Cargo Operations (GASCO).
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