CHEMCO Exit Exam • Set 7 Question 22 of 30
Introducing inert gas into a tank already inert with the object of further reducing the oxygen or hydrocarbon content to prevent combustion if air enters the tank is called
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Direct Answer
Option A: purging
Purging involves introducing inert gas to further reduce oxygen and hydrocarbon levels below the flammable range, especially after initial gas freeing. This is a critical safety measure to prevent ignition if air ingress occurs, as per ISGOTT.
All Options
A
purging
(Correct Answer)
B
gas freeing
C
gas dispersion
D
bonding
Detailed Explanation & Context
Purging involves introducing inert gas to further reduce oxygen and hydrocarbon levels below the flammable range, especially after initial gas freeing. This is a critical safety measure to prevent ignition if air ingress occurs, as per ISGOTT.
Relevant Framework: STCW 2010 Manila Amendments • DG Shipping E-Learning & Exit Exam Standards • Advanced Training for Chemical Tanker Cargo Operations (CHEMCO).
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