Question

The ball and roller bearings are lubricated to reduce friction and wear between the sliding parts of the bearing.

(a) True

(b) False

This question was addressed to me at a job interview.

The question is from Classification of Lubricating System in section Engine Friction and Lubrication of IC Engine

Answer 1

The correct answer is:

(a) True

Ball and roller bearings are lubricated primarily to reduce friction and wear between the rolling elements and the bearing surfaces. Proper lubrication ensures smooth operation, prevents metal-to-metal contact, and extends the life of the bearings by minimizing heat generation and wear.