Oilers/Plant Tenders (HHC) Civil Service Practice Exam

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What occurs if the gland to the pump is over-tightened?

The pump efficiency decreases
The pump runs noisily
The seal may break
The packing wears out quickly

The correct answer is: The packing wears out quickly

When the gland of a pump is over-tightened, various issues can arise, with one significant consequence being that the packing tends to wear out quickly. Over-tightening creates excessive pressure on the packing material, which can lead to premature degradation. Packing is designed to create a seal and allow for some movement while preventing leaks, but when it is compressed too much, it is subjected to excessive friction and heat. This situation shortens the lifespan of the packing material due to increased wear and can require more frequent replacements. Additionally, while other options highlight potential problems that may arise from over-tightening, the accelerated wear of the packing is particularly noteworthy because it directly impacts maintenance schedules and operational efficiency. Understanding how the gland affects the packing is essential for maintaining the reliability and longevity of a pump system.