Oilers/Plant Tenders (HHC) Civil Service Practice Exam

Is oil usually used to lubricate the bearings of a modern centrifugal blower?

1. Yes

2. No

3. Only in some models

4. Only in older models

The correct answer is: No

In most modern centrifugal blowers, oil is generally not used to lubricate the bearings. Instead, they often rely on grease or sealed bearings that do not require regular maintenance. This is due to advancements in bearing technology, which have improved the efficiency and durability of these components. Grease can provide longer-lasting lubrication under operational conditions, while sealed bearings reduce the need for maintenance by keeping contaminants out and minimizing lubrication loss. Thus, stating that oil is not typically used for lubrication in modern centrifugal blowers accurately reflects the prevailing engineering practices focused on reliability and low maintenance requirements.