Oilers/Plant Tenders (HHC) Civil Service Practice Exam

Where is the oil introduced in collar thrust bearings?

1. At the center of the shaft

2. Between collars at the periphery of the shaft

3. At the base of the bearing

4. In the oil reservoir

The correct answer is: Between collars at the periphery of the shaft

In collar thrust bearings, oil is introduced between the collars at the periphery of the shaft. This is essential for providing the necessary lubrication and reducing friction between the moving parts of the bearing. Proper lubrication at this location helps to maintain a thin film of oil, which is crucial for preventing wear and tear on the surfaces that come into contact with each other, particularly when the shaft is subjected to axial loads. The introduction of oil at the periphery ensures that it can effectively reach the areas where it is needed most, maintaining the overall efficiency and longevity of the bearing. In contrast, introducing oil at the center of the shaft or at the base of the bearing would not direct the lubricant to the critical contact surfaces effectively. Similarly, while oil reservoirs may store oil for the bearing system, they do not directly indicate where the oil is introduced in the context of collar thrust bearings. Thus, the correct understanding of how and where oil is introduced is vital for the proper functioning of these bearings in various applications.