GASCO Exit Exam • Set 6 Question 19 of 30
What is the main reason for a membrane class LNG tanker to retain a small quantity of cargo ("heel") during ballast passage?
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Direct Answer
Option D: For cold maintenance of the cargo tanks
In Gaztransport & Technigaz NO 96 membrane containment systems, Invar membranes and perlite insulation boxes maintain cargo containment and thermal insulation.
All Options
A
To ensure easy starting of cargo pump at loading port
B
To reduce the consumption of heavy fuel oil on passage
C
To avoid bottom of the cargo tank come into contact with oxygen
D
For cold maintenance of the cargo tanks
(Correct Answer)
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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