GASCO Exit Exam • Set 1 Question 4 of 30
What is the function of Boil-Off Gas (BOG) on an LNG carrier?
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Direct Answer
Option D: It is generated due to heat ingress and can be used as fuel or re-liquefied
Boil-Off Gas (BOG) forms when cargo absorbs ambient heat. Modern gas carriers use BOG in dual-fuel propulsion engines or re-liquefy it back into the cargo tanks.
All Options
A
It is dumped directly into seawater
B
It must be vented continuously into the atmosphere
C
It is used to extinguish boiler fires
D
It is generated due to heat ingress and can be used as fuel or re-liquefied
(Correct Answer)
Detailed Explanation & Context
Boil-Off Gas (BOG) forms when cargo absorbs ambient heat. Modern gas carriers use BOG in dual-fuel propulsion engines or re-liquefy it back into the cargo tanks.
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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