MCQOPTIONS
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MCQOPTIONS
This section includes 4 Mcqs, each offering curated multiple-choice questions to sharpen your Electrical Machines Questions and Answers knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
A 3-phase, 4-pole, 50 Hz induction motor is uses DOL method of starting. It is later replaced by auto transformer method of starting with a tapping ratio of ‘x’, then the starting torque will be? |
| A. | x *Tfl |
| B. | x^2 *Tfl |
| C. | 1/x *Tfl |
| D. | no change in the starting current |
| Answer» B. x^2 *Tfl | |
| 2. |
A 3-phase, 4-pole, 50 Hz induction motor is uses DOL method of starting. It is later replaced by auto transformer method of starting with a tapping ratio of ‘x’, then the starting current reduces by? |
| A. | x |
| B. | x^2 |
| C. | 1/x |
| D. | no change in the starting current |
| Answer» C. 1/x | |
| 3. |
A 3-phase, 4-pole, 50 Hz induction motor is uses DOL method of starting. It is later replaced by reactance method of starting with a fraction of ‘x’, then the starting torque reduces by? |
| A. | x |
| B. | x^2 |
| C. | 1/x |
| D. | no change in the starting current |
| Answer» C. 1/x | |
| 4. |
A 3-phase, 4-pole, 50 Hz induction motor is uses DOL method of starting. It is later replaced by reactance method of starting with a fraction of ‘x’, then the starting current reduces by? |
| A. | x |
| B. | x^2 |
| C. | 1/x |
| D. | no change in the starting current |
| Answer» B. x^2 | |