GASCO Exit Exam • Set 13 Question 14 of 30

Why should the temperature of cofferdam and liquid domes be maintained above +5°C

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Direct Answer

Option D: If inner full temperature drops to sub-zero temperatures, it can suffer structural damage

The correct answer is If inner full temperature drops to sub-zero temperatures, it can suffer structural damage. This complies with established gas tanker operational standards, thermodynamics, and the IGC Code safety requirements.

All Options

To ensure no heat transfers from seawater through outer hull

To equal The Teperatures of the containment system and insulation spaces

to ensure space is warm for inner hull inspection

If inner full temperature drops to sub-zero temperatures, it can suffer structural damage (Correct Answer)

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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Q1 The vapour remains in a __________ state till the condensation process is over. Q2 pressure is commonly used for measuring vacuum and pressures. Q3 __________ is the standard measurement of atmospheric pressure, with respect to 760 mm or 29.90 Inches of mercury. Q4 The effect of layering made up of two vapours or gases with different densities is called as____________ Q5 Onboard an LNG tanker with NO 96 containment system what will typically happen if a minor membrane leak(crack) occurs below the cargo level? Q6 The grade of steel used for inner hull construction is designed so to withstand Q7 Identify the odd one. Each main cargo pump electric motor is protected from certain faults. Which of the following is an exception? Q8 Why does the cofferdam heating system have two sets of heating coils? Q9 In an LNG carrier two types of cargo pumps are fitted in each cargo tank. Identify them by name. Q10 What are the two types ur heating medium which may be used for the typical cofferdam heating system onboard LNG carers?