Which statement about the inert gas system...

🔍 Key Concepts

• Inert gas system purpose – what the IG system is trying to achieve inside cargo tanks • How boiler load affects both the quality (oxygen content) and quantity (volume) of flue gas • What actually happens in the scrubber – which things it removes from flue gas and which things it does NOT change

💭 Think About

• Think about what an inert gas system needs most: low oxygen, large volume, or both? Under what boiler load is that realistically obtained? • Consider what processes are used to reduce oxygen in flue gas: is the scrubber designed to chemically remove oxygen, or mainly to cool and wash out contaminants? • Relate very light boiler load to combustion quality: does light load generally give you more or less complete combustion, and what does that do to oxygen content and flue gas volume?

✅ Before You Answer

• Verify what the scrubber is specifically designed to remove from the flue gas (e.g., soot, sulfur compounds, cooling water, but what about oxygen?). • Check how boiler load influences both the volume of flue gas produced and the oxygen concentration in that gas. • Consider standard operating practices: are soot blowers prohibited whenever IG is running, or only under certain conditions?

Which statement about the inert gas system is TRUE?

Flue gas with excessive oxygen content is de-oxygenated in the scrubber.

Boiler soot blowers should never be used when the IG system is operating.

The boiler will produce the best quality of flue gas for the IG system when the boiler load is very light.

The boiler will produce the most quantity of flue gas for the IG system when the boiler load is very light.

🔍 Key Concepts

💭 Think About

✅ Before You Answer