Oilers/Plant Tenders (HHC) Civil Service Practice Exam

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What is the typical shape of journal bearings?

Rectangular
Cylindrical
Conical
Square

The correct answer is: Cylindrical

The typical shape of journal bearings is cylindrical. Journal bearings are designed to support rotating shafts and provide a smooth surface for the shaft to rotate against. The cylindrical shape allows for uniform distribution of load and reduces friction between the shaft and the bearing surface, which is essential for efficient operation in machines. This design also facilitates lubrication, as the cylindrical shape can accommodate oil or other lubricants more effectively, ensuring that the shaft moves smoothly and there is less wear and tear over time. In contrast, the other shapes like rectangular, conical, and square are not commonly used for this application because they do not provide the same level of support, even load distribution, or efficient lubrication as cylindrical bearings do.