🔍 Key Concepts

• Dissimilar metals in seawater systems and how they affect corrosion and wastage • What shipyards are normally asked to inspect vs. fully replace on CuNi (copper‑nickel) piping during a dry‑docking • How a chief engineer balances cost, risk, and access when writing shipyard items

💭 Think About

• Think about which option shows you are proactively checking the most vulnerable parts of the CuNi system without assuming everything is fine or demanding a complete unnecessary renewal. • Ask yourself: in real life, would you usually request total replacement of all components, or targeted inspection/removal of sections that are most likely to suffer hidden damage? • Which choice reflects good maintenance practice: ignoring a system because it hasn’t failed yet, replacing everything regardless of condition, or inspecting areas where internal corrosion/erosion is likely but not visible externally?

✅ Before You Answer

• Make sure the option you pick shows active inspection or verification, not just assuming no problem exists. • Check whether the item describes something that is practical and commonly specified in a dockyard work list, rather than an extreme ‘replace everything’ approach. • Verify that the choice considers internal condition of CuNi piping in seawater service, which may not be visible until sections are opened or removed.