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If a 3-phase induction motor is started when one of the phases is not available, then the motor | |
A. | will hum but not start. [Wrong Answer] |
B. | will continue to operate satisfactorily on load below 57.7% of rated load if brought up to speed by some external means. [Wrong Answer] |
C. | will operate under reduced load but usually with considerable vibrations in case of wound rotor motor is brought up to speed by some external means. [Wrong Answer] |
D. | start and operate at a lower speed. [Wrong Answer] |
E. | all of the above except (d). [Correct Answer] |