Answer / Awdhesh Kumar Gautam

Cylinder lubrication on a main engine involves several components such as piston rings, cylinder liner, and crankcase oil. Here is a brief explanation:
1. Oil Ring: A metal ring placed around the piston to scrape oil from the cylinder wall and transfer it to the crankcase
2. Scraper Ring: A metal ring located above the oil ring that removes excess oil from the cylinder wall
3. Piston Ring: A ring-shaped component that separates the combustion chamber from the crankcase and helps in sealing the cylinder
4. Cylinder Liner: The inner part of the cylinder that is coated with a lubricant to reduce friction between the piston and the cylinder wall

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