The purpose of the piston rings is to?

Question

A. prevent the piston from moving up and down too fast in the cylinder B. prevent the connecting rod from disconnecting from the piston C. from a seal between the piston and the cylinder D. allow oil to built up on the cylinder walls

Answer 1

D.

Answer 2

"C"

Answer 3

C

Typically the piston rings are thought of as the top two rings that are used to form a seal between the piston and the cylinder. The lower rings usually are oil rings used to allow oil to move up the cylinder walls, but I've also heard them called out as "piston" rings