GASCO Exit Exam • Set 14 Question 23 of 30

Onboard an LNG carrier, why should CO2 which may freeze be removed prior to cool down?

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Direct Answer

Option B: at 60 °C CO2 freex=zes to form a powder which can block line components

The correct answer is at 60 °C CO2 freex=zes to form a powder which can block line components. This complies with established gas tanker operational standards, thermodynamics, and the IGC Code safety requirements.

All Options

oxygen in the CO2 can form an explosive mixture with LNG

at 60 °C CO2 freex=zes to form a powder which can block line components (Correct Answer)

to increase cargo carrying capacity

to prevent corrosive effect of CO2 / lng mixtur

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 14

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Q1 Which cargo tank level measuring system is commonly used as a primary system? Q2 Liquefied gas carriers are normally loaded or unloaded through__________situated amidships. Q3 What test is carried out to ensure that all stripping / spray pumps are operational? Hint: this test is is often done after leaving the loading port as it is allows time for installation of an auxiliary cargo pump should it be necessary. Q4 What is the approximate temperature desired on board on LNG tanker, for the output from the forcing vaporizer? Q5 What is the purpose of having a cofferdam heating system? Q6 Which of the following options is an exception in a typical LNG boil off gas reliquefication plant? Q7 After extinguishing a paint locker fire using the fixed CO2 system, the next immediate action is for the space to be Q8 Smoke detectors, the correct answer is, Q9 which of the following conditions can contribute to accidents ? Q10 If the concentration of the fuel is less than 5% LNG vapors cannot burn because of inadequate___________