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| Q.2 | If the ball and roller bearing of synchronous motor is damaged the possible reasons may be—————– . | |
| Ans | 1. the bearing may make noise while operation of the motor | |
| 2. Oil need replacement | ||
| 3. All of the options | ||
| 4. grease or oil is leaking out of bearing housing |
Correct Ans Provided: 3
