MCQOPTIONS
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MCQOPTIONS
This section includes 15 Mcqs, each offering curated multiple-choice questions to sharpen your Mechatronics knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
What is the speed of a 3-phase induction motor if has a synchronous speed of 300 rpm and has percentage slip of 0.2% ? |
| A. | 200 rpm |
| B. | 380 rpm |
| C. | 280 rpm |
| D. | 294 rpm |
| Answer» E. | |
| 2. |
What is the frequency of a 3-phase induction motor if has 12 poles and its synchronous speed is 620 rpm? |
| A. | 60 Hz |
| B. | 62 Hz |
| C. | 80 Hz |
| D. | 58 Hz |
| Answer» C. 80 Hz | |
| 3. |
What is the speed of a 3-phase induction motor if has a synchronous speed of 400 rpm and has percentage slip of 5% ? |
| A. | 700 rpm |
| B. | 380 rpm |
| C. | 480 rpm |
| D. | 500 rpm |
| Answer» C. 480 rpm | |
| 4. |
What is the synchronous speed of a 3-phase induction motor if has 9 poles and its frequency is 50 Hz? |
| A. | 700 rpm |
| B. | 600 rpm |
| C. | 650 rpm |
| D. | 666.667 rpm |
| Answer» E. | |
| 5. |
What is the synchronous speed of a 3-phase induction motor if has 8 poles and its frequency is 40 Hz? |
| A. | 700 rpm |
| B. | 600 rpm |
| C. | 650 rpm |
| D. | 500 rpm |
| Answer» C. 650 rpm | |
| 6. |
What does PAM stands for, in context to speed control method of induction motor? |
| A. | Pole amplitude maintenance |
| B. | Passive amplitude modulation |
| C. | Pole amplification modulation |
| D. | Pole amplitude modulation |
| Answer» E. | |
| 7. |
Which speed control method can only be applied to squirrel cage type induction motors? |
| A. | Multiple Stator winding method |
| B. | Rotor rheostat speed control method |
| C. | Pole amplitude modulation method |
| D. | Frequency control method |
| Answer» B. Rotor rheostat speed control method | |
| 8. |
What happens to the synchronous speed of the induction motor if the frequency of the supply increases? |
| A. | It remains same |
| B. | It increases |
| C. | It decreases |
| D. | It does not work |
| Answer» C. It decreases | |
| 9. |
What happens to the synchronous speed of the induction motor if the number of stator poles increases? |
| A. | It remains same |
| B. | It increases |
| C. | It decreases |
| D. | It does not work |
| Answer» D. It does not work | |
| 10. |
Rotor rheostat speed control method can be used for controlling the speed of squirrel cage motors. |
| A. | True |
| B. | False |
| Answer» C. | |
| 11. |
Speed of an induction motor is independent of the number of stator poles. |
| A. | True |
| B. | False |
| Answer» C. | |
| 12. |
Speed of an induction motor is dependent on the frequency of the input supply. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 13. |
What is the frequency of a 3-phase induction motor if has 10 poles and its synchronous speed is 720 rpm? |
| A. | 60 Hz |
| B. | 50 Hz |
| C. | 80 Hz |
| D. | 40 Hz |
| Answer» B. 50 Hz | |
| 14. |
What is the speed of a 3-phase induction motor if has a synchronous speed of 500 rpm and has percentage slip of 4% ? |
| A. | 700 rpm |
| B. | 600 rpm |
| C. | 480 rpm |
| D. | 500 rpm |
| Answer» D. 500 rpm | |
| 15. |
What is the synchronous speed of a 3-phase induction motor if has 12 poles and its frequency is 60 Hz? |
| A. | 700 rpm |
| B. | 600 rpm |
| C. | 650 rpm |
| D. | 500 rpm |
| Answer» C. 650 rpm | |