What is the purpose of the scraper rings?

• A. To scrape carbon deposits from the sides of the cylinders.
• B. To secure the piston in the cylinder.
• C. To seal oil.
• D. To cool the piston.

Answer: (A)

The scraper rings are there to wipe excess lubricating oil off the cylinder walls as the piston moves. By scraping this oil away and returning it to the crankcase, they prevent oil from burning in the combustion chamber, which helps keep the cylinder clean and reduces carbon buildup on the sides. They don’t secure the piston, their primary role isn’t sealing oil, and they aren’t a cooling feature for the piston.