Engine_2014 : Steam Plants - 1379/1951
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| An unusual vibration in the main propulsion turbine unit, accompanied by a rumbling sound in the reduction gear, could be caused by __________ . |
| A) overloading of the condenser |
| B) a carryover from the boiler |
| C) a reduction in condenser vacuum |
| D) a labyrinth seal failure |
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