Oilers/Plant Tenders (HHC) Civil Service Practice Exam

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Why is spacing the joints of packing rings important?

  1. To improve heat dissipation

  2. To ensure equal wear

  3. To facilitate maintenance

  4. To prevent leaks

The correct answer is: To prevent leaks

Spacing the joints of packing rings is primarily important to prevent leaks. When packing rings are installed, they create a seal that is essential for containing fluids under pressure within pumps and valves. If the joints in the packing rings are aligned, gaps can be formed which may allow the fluid to escape, leading to leaks. Properly spacing the joints breaks the continuity of these gaps around the circumference, which helps maintain a tight seal and minimizes the possibility of leakage. Additionally, while the other factors listed can influence packing ring function collectively, they do not hold the same significance regarding leak prevention. For example, while equal wear and maintenance facilitation may improve the longevity and ease of service of packing rings, they are secondary to the fundamental necessity of preventing leaks in maintaining system integrity.