Question

How is the flow of whole oil concerning the filter in a by-pass system of oil filtration?

(a) Passes the filter

(b) Doesn’t pass the filter

(c) Partially passes the filter

(d) The oil flow is not related to the filter

This question was posed to me in semester exam.

Origin of the question is Lubrication and Lubricants in portion Lubrication and Lubricants of Automotive Engine Design

Answer 1

Correct choice is (b) Doesn’t pass the filter

To explain I would say: In the bypass system the whole oil doesn’t pass through the filter at the same time. Most of the oil without being filtered goes to the bearings whereas the rest passing through the filter is cleaned out and returned to the sump.