Engine_2014 : Electricity - 843/2299
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| How is the seating the brushes on a DC motor commutator first accomplished? |
| A) a file for cutting the approximate curvature followed by sandpaper for the final fit |
| B) using fine sandpaper on a deenergized machine between the brush and the commutator to establish the proper curvature |
| C) emery paper for the initial cut and crocus cloth for the finishing cut |
| D) course lapping compound, followed by a medium and then a fine grade |
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