Engineering · Diesel — Liner Wear
Cylinder liner wear is normally greatest:
- AAt the bottom of the stroke
- BOnly at mid-stroke
- CUniformly along the entire liner
- DNear the top of ring travel (top dead center), where pressure, temperature, and poor lubrication coincide✓ Correct
Explanation
Maximum wear occurs near the top ring reversal point, where combustion pressure is highest, temperatures break down the oil film, and acidic/corrosive products concentrate. Liners are measured (gauged) at intervals to track ovality and wear.
Authority: Modern Marine Engineer's Manual; engine wear
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