GASCO Exit Exam • Set 15 Question 10 of 30

On an lng tanker why do we need to maintain vapor arm connected to shore even after completion of discharging until just before sailing?

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Direct Answer

Option B: to manage tank pressuree in case of ship gas burning failur

The correct answer is to manage tank pressuree in case of ship gas burning failur. This complies with established gas tanker operational standards, thermodynamics, and the IGC Code safety requirements.

All Options

to increase tank pressuree by getting gas from shor

to manage tank pressuree in case of ship gas burning failur (Correct Answer)

to drain remaining liquid to shor

to ensure proper sequence before disconnection

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 15

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Q1 How is the cool down of cargo tanks done? Q2 What is the normal in service operating pressure difference between the primary and secondary insulation spaces? Q3 For the membrane class LNG carrier, during drying operation what is the recommended differential pressure between primary insulation space and cargo tank? Q4 On an lng tanker, during discharging why should stripping pumps be started at a minimum of 0.5m? Q5 On an lng tanker, during discharging which of the following is not a reason for opening the cargo discharge valve to about 10-20% before starting of cargo pump? Q6 Why is energy transfer calculated during lng cargo transfer and not just volume of transfer? Q7 Onboard lng carrier, what is the maximum allowable filling limit as per the IMO/ IGC regulation? Q8 Onboard a LNG tanker, with NO 96 containment system, which valves are used to maintain the pressure within the primary and secondary insulation spaces? Q9 On an lng tanker, during discharging which of the following is not required to ensure the optimum performance of a main cargo pump? Q10 On an lng tanker why do we need to maintain vapor arm connected to shore even after completion of discharging until just before sailing?