Oilers/Plant Tenders (HHC) Civil Service Practice Exam

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How is the temperature of automotive-type bearings usually controlled?

By using a pressure-feed oil system
By using air cooling systems
By using lower viscosity oils
By limiting usage time

The correct answer is: By using a pressure-feed oil system

Automotive-type bearings are typically controlled in temperature through the use of a pressure-feed oil system. This method is effective because it ensures a consistent flow of lubricating oil to the bearings, which not only provides lubrication but also aids in dissipating heat generated during operation. The oil absorbs heat from the bearings and carries it away, maintaining optimal operating temperatures. A pressure-feed oil system allows for regulated delivery of oil directly to where it’s needed most, minimizing the risk of overheating that can occur due to friction. This is particularly important in high-speed applications, where temperatures can rise quickly if not managed properly. Although other methods, such as air cooling or adjusting oil viscosity, can influence temperature, they may not provide the same level of direct and sustained control as a pressure-feed system. Therefore, utilizing such a system is crucial for maintaining the longevity and performance of automotive bearings.