🔍 Key Concepts

• Function of compression rings in a diesel or gasoline engine cylinder • How chrome plating wears on a stainless steel ring during normal operation • What a normal wear pattern looks like versus abnormal or damaging wear

💭 Think About

• Think about what the compression ring is rubbing against every stroke and which materials are actually in contact. • Ask yourself: over time, will the chrome layer completely disappear, stay perfect and untouched, or show a controlled, even wear pattern? • Consider what kind of surface condition would still seal well, control oil, and avoid excessive cylinder wear.

✅ Before You Answer

• Compare each choice to what would be considered normal, uniform wear rather than damage or failure. • Eliminate any option that suggests progressively worsening or deepening damage to the ring surface. • Look for the choice that best reflects a stable, serviceable appearance over the ring’s operating life, not just when brand new.