Which statement about boil-off vapour is correct on a liquefied gas tanker?
Direct Answer
Option C: vapour generated by heat entering a refrigerated cargo
Boil-off gas (BOG) is continuously generated as ambient heat ingress crosses the thermal insulation barrier into refrigerated liquefied gas cargo. Under the IGC Code, managing this evolving vapour requires strict tank pressure monitoring, reliquefaction, or combustion in shipboard boilers or engines.
All Options
Detailed Explanation & Context
Boil-off gas (BOG) is continuously generated as ambient heat ingress crosses the thermal insulation barrier into refrigerated liquefied gas cargo. Under the IGC Code, managing this evolving vapour requires strict tank pressure monitoring, reliquefaction, or combustion in shipboard boilers or engines.
Relevant Framework: STCW 2010 Manila Amendments • DG Shipping E-Learning & Exit Exam Standards • Liquefied Gas Tanker Cargo Operations (LGTCO/LGTF).
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