GASCO Exit Exam • Set 6 Question 30 of 30

On each LNG cargo tank two relief valves are fitted. Identify the correct combination of "set pressure" (lifting pressure) and "reseating pressure" for these valves.

✓

Direct Answer

Option A: 250 mbar and 220 mbar

The correct answer is 250 mbar and 220 mbar. This complies with established gas tanker operational standards, thermodynamics, and the IGC Code safety requirements.

All Options

250 mbar and 220 mbar (Correct Answer)

50 mbar and 20 mbar

2.5 bar and 2.2 bar

500 mbar and 200 mbar

Detailed Explanation & Context

The correct answer is 250 mbar and 220 mbar. This complies with established gas tanker operational standards, thermodynamics, and the IGC Code safety requirements.

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 6

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Q1 Onboard an LNG tanker, why is forced boil - off required out during loaded passage? Q2 If there is an interruption at the end of cooldown before loading, what is the recommended measure to be taken? Q3 What does the pressurizing the insulation spaces with nitrogen and maintaining a slightly higher pressure than the atmospheric pressure prevent? Q4 Can ballast operations take place during custody transfer measurement? Q5 What is the medium used for inerting cargo tanks? Q6 What is the main reason for a membrane class LNG tanker to retain a small quantity of cargo ("heel") during ballast passage? Q7 Which equipment Is used for evacuating the Insulation spaces? Q8 Safety is dependent on orderliness and cleanliness. Order may be maintained by______. Q9 Oxygen in the atmosphere of the tank is used up when iron is converted into oxides during the corrosion process. ---------------i in the tanks prior to entry. Q10 gas pressurizes the liquid out of the soda acid type- water extinguisher through the dip tube.