Tankerman · Safety — Inert Gas
The purpose of an inert gas system on a tanker is to:
- AIncrease the cargo pumping rate
- BKeep the oxygen content of cargo tanks too low to support combustion✓ Correct
- CCool the cargo
- DRemove water from the cargo
Explanation
Inert gas reduces the oxygen in the tank atmosphere below the level that supports combustion, so even with hydrocarbon vapor present the mixture cannot ignite.
Authority: Tank Vessel Safety (USCG topic)
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