An electric motor bearing is running hotter than normal and emitting a grinding noise. After inspection, you find the grease has become dry and crumbly. What has most likely occurred?
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A
The grease was over-applied, causing churning heat
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B
The base oil has bled out of the thickener, leaving behind a dried soap structure
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C
The bearing has been contaminated with water, washing out the grease
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D
The NLGI grade was too high for the operating speed