Engine_2014 : Steam Plants - 1423/1951
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| Excessive thrust bearing wear in a main propulsion turbine rotor should FIRST become apparent by __________ . |
| A) rubbing noises when jacking over the main unit |
| B) metal particles in the lube oil purifier |
| C) an intermittent vibration when changing speed |
| D) taking rotor position indicator readings |
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