Question 1 of 270705eccefa0bacbc34ba4d46d02

The internal feed pipe in a D-type marine boiler __________.

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Question 1 of 27070
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The internal feed pipe in a D-type marine boiler __________.

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🔍 Key Concepts

• Function of the internal feed pipe in a D-type marine boiler steam drum • How feedwater should enter the drum to protect boiler circulation and drum metal • Difference between mechanical distribution, circulation guidance, and deaeration

💭 Think About

• Think about what happens if cold feedwater is dumped directly into the steam drum without any internal piping or distribution—what problems could occur? • In a D-type boiler, where are the downcomers located, and how does feedwater entry affect natural circulation between downcomers and risers? • Which option describes a function that is most critical to boiler efficiency and protection every time feedwater enters the drum, not just occasionally?

✅ Before You Answer

• Match the choice to physical location of the internal feed pipe relative to the normal water level in the steam drum. • Decide whether the primary job is mixing/distribution, directing flow to circulation paths, or removing dissolved gases. • Ask: which description best aligns with how designers prevent thermal shock and ensure stable water/steam separation inside the drum?