Question 255General Subjects - QMED
70% to passPermanent centrifugal pump shaft damage due to erosion, corrosion, and wear at the stuffing box is usually prevented by _______________.
Awearing rings
Binternally flooded lantern rings
Crenewable sleeves
Da hardened sprayed metal coating
AI Explanation
The correct answer is C) renewable sleeves. Renewable sleeves are the most effective way to prevent permanent centrifugal pump shaft damage due to erosion, corrosion, and wear at the stuffing box. These sleeves are designed to be easily replaced when worn, protecting the underlying pump shaft from the harsh environment. In contrast, the other options like wearing rings, internally flooded lantern rings, or hardened coatings may not provide the same level of protection or ease of replacement.
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