单选题Which of the following actions should be taken if during a routine maintenance inspection of a centrifugal pump, localized scoring on a pump shaft sleeve is detected?（）ACorrect the cause of the scoring and repair the sleeve or replace with a new oneBReassemble the unit and provide more water leak off for proper lubricationCCheck for parallel alignment of the sleeve radial faces to the sleeve boresDReassemble the unit and adjust the governor to obtain a slower speed
单选题
Which of the following actions should be taken if during a routine maintenance inspection of a centrifugal pump, localized scoring on a pump shaft sleeve is detected?（）
A
Correct the cause of the scoring and repair the sleeve or replace with a new one
B
Reassemble the unit and provide more water leak off for proper lubrication
C
Check for parallel alignment of the sleeve radial faces to the sleeve bores
D
Reassemble the unit and adjust the governor to obtain a slower speed
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