The adjustable spherically seated self-aligning bearing housings used in main turbines are provided with oil deflector rings. The function of these rings is to __________.

Correct Answer: Option A — prevent the external leakage of oil out of the bearing housing

Adjustable spherically seated bearing housings feature oil deflector rings designed to act as physical barriers, preventing the external leakage of lubricating oil out of the housing and keeping contaminants from entering the bearing assembly.