🔍 Key Concepts

• Piston ring seating and why new rings must "bed in" to the cylinder liner • Difference in hardness between chromium and bronze and which material will wear first • Purpose of adding a softer metal insert into a very hard ring face

💭 Think About

• Think about what happens during the initial run‑in period of a new or overhauled engine: what needs to happen between the ring and the liner for good compression and sealing? • Chromium is very hard and wear resistant—if you add a softer bronze strip to the face, which surface (bronze, chrome, or liner) will adjust its shape first, and how does that help the ring do its job? • Which answer choice describes a functional result of letting a softer material conform quickly to the cylinder wall?

✅ Before You Answer

• Compare which is harder: chrome vs. bronze and what that implies about wear and conforming to shape • Ask: is the main goal here to protect the hard ring, protect the liner, improve lubrication, or help the ring conform to the liner? • Eliminate any choice that describes an effect that would more logically come from an oil groove or surface finish, rather than from inserting a softer metal into the ring face.