Question 372General Subjects - Assistant Engineer
70% to passWhat should be done if localized scoring is discovered on a pump shaft sleeve during routine maintenance inspection?
AReassemble the pump and set the governor to obtain a slower speed.
BReassemble the pump and provide more water leak off for lubrication.
CCheck for parallel alignment of the sleeve radial face to the sleeve bore.
DCorrect the cause of scoring and install a new shaft sleeve.
AI Explanation
The correct answer is D) Correct the cause of scoring and install a new shaft sleeve. The reasoning behind this is that localized scoring on a pump shaft sleeve indicates there is an issue with the pump's operation or maintenance that needs to be addressed. Simply reassembling the pump or adjusting the speed or lubrication (as in answers A and B) would not resolve the underlying problem causing the scoring. Instead, the root cause of the scoring should be identified and corrected, and the scored shaft sleeve should be replaced with a new one to prevent further damage to the pump. Answer C is incorrect because checking the alignment would not directly address the scoring issue.
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