Question

In by pass type filter arrangement, only a small portion of the lubricating oil is passed through the filter and the remaining lubricating oil is directly supplied to the bearings by the oil pump at pre-set pressure.

(a) True

(b) False

I have been asked this question in an interview.

My question is based upon Classification of Lubricating System in portion Engine Friction and Lubrication of IC Engine

Answer 1

The correct answer is:

(a) True

In a bypass-type filter arrangement, only a small portion of the lubricating oil is passed through the filter, while the majority of the oil is directly supplied to the bearings by the oil pump at a pre-set pressure. This system helps ensure continuous lubrication even if the filter is clogged or during cold start conditions when full filtration might not be necessary.