Question

What is the function of an oil scraper ring in an engine?

(a) Retain compression

(b) Lubricate cylinder walls

(c) Maintain vacuum

(d) Reduce piston wear

The question was asked in a job interview.

My question comes from Parts of an IC Engine Cylinder and Liner in division Internal Combustion Engines of Automobile Engineering

Answer 1

The correct choice is (b) Lubricate cylinder walls

To explain I would say: Oil scraper rings lubricate cylinder walls. Lubricating oils are most important for an engine because it reduces the friction between walls and other parts and it also works as a cooling agent.