Oilers/Plant Tenders (HHC) Civil Service Practice Exam

Which statement about centrifuges in a lubrication system is accurate?

1. Centrifuges are generally used to filter recirculating oil

2. Centrifuges only clean the bearings

3. Centrifuges are used exclusively in hydraulic systems

4. Centrifuges serve as a heat exchanger

The correct answer is: Centrifuges are generally used to filter recirculating oil

Centrifuges are specifically designed to separate particles from fluids, and in the context of a lubrication system, they are effectively utilized to filter recirculating oil. By using centrifugal force, these devices can remove contaminants such as dirt, metal shavings, and sludge from the oil, ensuring that only clean, lubricated oil circulates within the system. This filtration capability is crucial for maintaining the overall performance and longevity of machinery by preventing wear and tear on components due to dirt and debris. The other statements are less accurate: the second statement overlooks the broader application of centrifuges, as they filter oil throughout the entire lubrication system and not just the bearings. The third statement incorrectly limits the use of centrifuges to hydraulic systems, while they are also commonly found in various lubrication systems. Lastly, while heat exchangers serve a vital function in managing temperatures, a centrifuge does not fulfill this role; instead, it focuses on the separation of contaminants from the oil. Thus, the correct choice emphasizes the crucial role of centrifuges in filtering recirculating oil for effective lubrication system maintenance.