MCQOPTIONS
Saved Bookmarks
MCQOPTIONS
This section includes 7 Mcqs, each offering curated multiple-choice questions to sharpen your Electric Drives Questions and Answers knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Calculate the value of the frequency if the inductive reactance is 60 Ω and the value of the inductor is 4 H. |
| A. | 2.38 Hz |
| B. | 5.54 Hz |
| C. | 4.65 Hz |
| D. | 9.42 Hz |
| Answer» B. 5.54 Hz | |
| 2. |
Calculate the reactive power in a 24.5 Ω resistor. |
| A. | 0 VAR |
| B. | 5 VAR |
| C. | 8 VAR |
| D. | 9 VAR |
| Answer» B. 5 VAR | |
| 3. |
Calculate the value of Crest factor if Vpeak=798 V and Vr.m.s=489 V. |
| A. | 1.63 |
| B. | 1.54 |
| C. | 1.59 |
| D. | 1.26 |
| Answer» B. 1.54 | |
| 4. |
Calculate peak-peak voltage if Vmax=180 V and Vmin=60 V. |
| A. | 120 V |
| B. | 150 V |
| C. | 170 V |
| D. | 110 V |
| Answer» B. 150 V | |
| 5. |
Calculate the circuit turn-off time for 3-Φ Fully controlled rectifier if the firing angle is 120° and supply frequency is 60 Hz. |
| A. | 1.8 msec |
| B. | 3.2 msec |
| C. | 6.3 msec |
| D. | 2.7 msec |
| Answer» E. | |
| 6. |
Calculate the circuit turn-off time for 3-Φ Fully controlled rectifier if the firing angle is 27° and supply frequency is 50 Hz. |
| A. | 11.8 msec |
| B. | 14.4 msec |
| C. | 16.1 msec |
| D. | 16.5 msec |
| Answer» B. 14.4 msec | |
| 7. |
Calculate the value of the Input power factor for 3-Φ Fully controlled rectifier if the firing angle value is 90°. |
| A. | 0 |
| B. | .2 |
| C. | .3 |
| D. | .4 |
| Answer» B. .2 | |