Tennessee Wastewater Operator Practice Exam

What causes most bearing failures on turbine or centrifugal blowers?

1. Insufficient lubrication

2. Too much grease

3. Dust and dirt accumulation

4. Low ambient temperatures

The correct answer is: Too much grease

Most bearing failures on turbine or centrifugal blowers can primarily be attributed to insufficient lubrication. Bearings require a consistent and adequate supply of lubricant to minimize friction and wear. When lubrication is inadequate, it leads to increased friction, overheating, and ultimately, bearing failure. While excessive grease can lead to problems as well, such as overfilling, which can create pressure issues or even cause seals to fail, it does not account for the majority of bearing failures. Effectively, ensuring proper lubrication, rather than simply over-greasing, is crucial in maintaining the longevity and efficiency of bearings in blowers. This is why understanding the lubrication needs specific to the equipment is vital for preventing bearing failure.