Oilers/Plant Tenders (HHC) Civil Service Practice Exam

What method is commonly used for lubricating turbine-generator reduction gear surfaces?

1. Gravity Feed Lubrication

2. Pressure Circulation Lubrication

3. Manual Lubrication

4. Splash Lubrication

The correct answer is: Pressure Circulation Lubrication

Pressure circulation lubrication is the commonly used method for lubricating turbine-generator reduction gear surfaces due to its ability to ensure a consistent and adequate supply of lubricant to all necessary components. This method employs a pump to circulate lubricant under pressure throughout the system, which helps maintain a steady flow and allows for precise control over the lubrication process. This technique is particularly effective in high-speed or high-load applications, such as those found in turbine-generators, where maintaining proper lubrication is critical for reducing wear and preventing overheating. The pressure circulation system also enables the lubricant to reach hard-to-access areas, providing comprehensive coverage and minimizing the risk of oil starvation. In contrast to other methods, pressure circulation lubrication reduces the likelihood of lubricant breakdown and contamination, thus extending the life of both the lubricant and the machinery involved. The ability to monitor and adjust lubricant flow further enhances the reliability and performance of the gear systems in turbine-generators.