GASCO Exit Exam • Set 4 Question 29 of 30
What does the term boil off mean
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Direct Answer
Option B: Natural vapourization of LNG in the cargo tank
Boil-Off Gas (BOG) is the continuous natural vaporization of cryogenic liquefied gas (like LNG at -161.5°C) caused by ambient heat ingress through the cargo tank insulation.
All Options
A
Cargo vapour space in insulation spac
B
Natural vapourization of LNG in the cargo tank
(Correct Answer)
C
Cargo tank vapour pressuree during voyag
D
Excess steam dumped from the boiler
Detailed Explanation & Context
Boil-Off Gas (BOG) is the continuous natural vaporization of cryogenic liquefied gas (like LNG at -161.5°C) caused by ambient heat ingress through the cargo tank 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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