UPMSP Vocational Automobile Practice Questions - Uttar Pradesh UPMSP Intermediate (Class 12) Vocational Automobile - Code 214 Exam

What is the main function of the oil control ring fitted on an engine piston?

To scrape excess lubricating oil off the cylinder wall and return it to the oil sump To seal high-pressure combustion gases inside the combustion chamber To increase engine compression ratio during the intake stroke To connect the piston directly to the crankshaft pin

Correct Answer:

To scrape excess lubricating oil off the cylinder wall and return it to the oil sump

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