OCTCO/OCTF Exit Exam • Set 5 Question 2 of 30
Inert gas is introduced to cargo tank to:
✓
Direct Answer
Option C: To exclude oxygen and thus prevent fire or explosion.
Inert gas (with low oxygen content <5% from the generator and <8% in the tank) is supplied to cargo tanks to displace oxygen and render the atmosphere non-flammable.
All Options
A
Lower the LEL of cargo vapor.
B
To make the cargo vapors a lean mixture of hydro carbons
C
To exclude oxygen and thus prevent fire or explosion.
(Correct Answer)
D
Cool down the cargo
Detailed Explanation & Context
Inert gas (with low oxygen content <5% from the generator and <8% in the tank) is supplied to cargo tanks to displace oxygen and render the atmosphere non-flammable.
Relevant Framework: STCW 2010 Manila Amendments • DG Shipping E-Learning & Exit Exam Standards • Oil and Chemical Tanker Cargo Operations (OCTCO/OCTF).
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