GASCO Exit Exam • Set 10 Question 25 of 30
In a membrane class LNG tanker, why is the cargo tank pressure increased from 20 mbar g to 150 mbar g at the end of operation?
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Direct Answer
Option C: To purge all equipment and pipelines thoroughly
In Gaztransport & Technigaz NO 96 membrane containment systems, Invar membranes and perlite insulation boxes maintain cargo containment and thermal insulation.
All Options
A
To overcome back pressuree from the vent lin
B
To speed up the inerting process
C
To purge all equipment and pipelines thoroughly
(Correct Answer)
D
To test the tanks prior to aerating
Detailed Explanation & Context
In Gaztransport & Technigaz NO 96 membrane containment systems, Invar membranes and perlite insulation boxes maintain cargo containment and thermal insulation.
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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