Question 684Steam Plants - Assistant Engineer

The correct answer is C) Pressure lubricated. Pressure lubricated bearings can carry the highest unit loading compared to the other options. This is because pressure lubrication provides a continuous supply of lubricant to the bearing surfaces, which helps maintain a thick oil film that can withstand higher loads without failure. In contrast, ring lubricated, disk lubricated, and oil whip lubricated bearings rely on less effective methods of lubricant delivery, limiting their ability to support higher unit loads. The other options are less effective at maintaining a stable lubricant film under high loads. Ring lubricated and disk lubricated bearings rely on surface tension and rotation to distribute the lubricant, which may not be sufficient for the highest unit loads. Oil whip lubrication is a less common and less reliable method that is not suitable for the highest loading conditions.