🔍 Key Concepts

• Cylinder liner wear mechanisms such as abrasive wear, corrosive wear, and scuffing • Effects of fuel quality on combustion residues, deposits, and acidity • Relationship between combustion conditions (air supply, compression, injection pressure) and liner lubrication

💭 Think About

• For each option, ask: does this change make the environment at the liner surface cleaner/smoother, or dirtier/harsher? • Think about which factor is most likely to introduce hard particles or corrosive products that directly attack the liner surface. • Consider which options primarily affect engine efficiency versus which directly affect contamination or attack on metal surfaces.

✅ Before You Answer

• For each choice, decide whether it would increase or decrease combustion cleanliness inside the cylinder. • Ask which option would most likely increase abrasive or corrosive material between piston rings and liner. • Verify which change would most strongly overwhelm the lubricant film on the liner surface.