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Question
The function of a second ring is that it is a
Options:
A .  Back up compression ring which will work in place of the top ring when it is broken
B .  Compression ring and aids the top ring in sealing and cooling
C .  Back up oil control ring which will work in place of the bottom ring when it is broken
D .  Cushion ring which prevents piston slap and knock
Answer: Option B

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