GASCO Exit Exam • Set 2 Question 22 of 30

What is 'gassing up' in gas carrier operations?

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Direct Answer

Option A: Replacing inert gas in cargo tanks with cargo vapor before initial cool-down

Gassing up involves displacing inert gas with cargo vapor to prepare tanks for cool-down. Per IGC Code requirements, this process prevents the formation of explosive mixtures and ensures the cargo remains within specification, avoiding contamination by inert gas components before the cryogenic loading phase begins.

All Options

Replacing inert gas in cargo tanks with cargo vapor before initial cool-down (Correct Answer)

Pumping bilge water out

Injecting air into cargo tanks

Venting excess gas into atmosphere

Detailed Explanation & Context

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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More Questions in GASCO Set 2

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Q1 What safety valve is fitted on cargo lines to relieve thermal expansion of trapped liquid? Q2 What type of cargo compressor is commonly used in LPG reliquefaction plants? Q3 What emergency signal activates the shipwide ESD during cargo operations? Q4 What publication provides detailed safety guidelines for Tanker Safety in gas operations? Q5 How frequently must operational drills and practical checks for regulatory compliance and STCW code requirements be conducted for Advanced Liquefied Gas Tanker? Q6 What documented record must be maintained on board following completion of tasks related to regulatory compliance and STCW code requirements in Advanced Liquefied Gas Tanker? Q7 What is the primary function of the cargo vaporizer on an LNG carrier? Q8 Which type of independent tank is spherical in shape and self-supporting? Q9 What is 'gassing up' in gas carrier operations? Q10 What risk occurs if water vapor is present inside an LPG cargo system before loading cargo?