🔍 Key Concepts

• Carefully count the piston rings shown in the cross‑section and notice their different positions and thicknesses. • Identify which ring looks like an oil scraper ring (often lower on the piston skirt and sometimes shaped or ported differently). • Look closely at the upper part of the piston/crown area for any bolted joint or separate piece that would indicate a replaceable crown.

💭 Think About

• How many rings are actually shown at the top of the piston, and are they all the same type, or is one located separately lower on the skirt? • Does any ring appear designed to control oil on the cylinder wall rather than just seal compression? What visual features suggest that? • Can you see a clear separation line, fastening bolts, or other features between the crown and the rest of the piston that would prove the crown is a separate, replaceable part? Or is it one solid piece?

✅ Before You Answer

• Before choosing an answer, physically count each ring in the illustration and note its vertical location. • Confirm whether there is only one distinct oil-control (scraper) ring or none at all by its unique placement or design. • Verify if the crown is clearly a separate, fastened component (with a joint/bolts) or if the piston appears to be a single casting, since this determines whether a ‘replaceable crown’ is accurate.