MCQOPTIONS
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MCQOPTIONS
This section includes 2 Mcqs, each offering curated multiple-choice questions to sharpen your Electrical Machines knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
If use auto transformer method starting to start an induction motor to replace star-delta method, then the required tapping on the transformer will be _________ |
| A. | 57.73% |
| B. | 86.7% |
| C. | 57% |
| D. | 66.66% |
| Answer» B. 86.7% | |
| 2. |
A three phase induction motor is sometimes called a generalized transformer in so far as voltage and frequency transformation has been concerned. Then the rotor emf E2 and the rotor current I2 are zero at _________ |
| A. | Ns |
| B. | 2Ns |
| C. | Zero |
| D. | Slip of 50% |
| Answer» B. 2Ns | |