General Studies · Engine Components
What is the primary function of top piston rings (compression rings) in an internal combustion engine?
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1To scrape oil from the cylinder walls back into the sump
- 2To create lubrication channels along the piston skirt
- 3To seal the combustion chamber and prevent leakage of high-pressure gases✓
- 4To increase the structural weight of the piston head assembly
Correct answer
To seal the combustion chamber and prevent leakage of high-pressure gases
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