GASCO Exit Exam • Set 14 Question 26 of 30
On an Lng tanker during the initial stage of cooling down operation, prior discharging why is it necessary to open the main loading valves of the forward and the aft cargo tanks?
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Direct Answer
Option D: to purge the vapor which remains at both ends of the liquid header
The correct answer is to purge the vapor which remains at both ends of the liquid header. This complies with established gas tanker operational standards, thermodynamics, and the IGC Code safety requirements.
All Options
A
to ensure liquid flow into the forward and aft cargo tanks
B
to increase the pressuree in the cargo tanks before discharging
C
to clean anhy impurities in the pipelines before discharging
D
to purge the vapor which remains at both ends of the liquid header
(Correct Answer)
Detailed Explanation & Context
The correct answer is to purge the vapor which remains at both ends of the liquid header. 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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