MCQOPTIONS
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MCQOPTIONS
This section includes 10 Mcqs, each offering curated multiple-choice questions to sharpen your Power Electronics knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
The diodes D4 and D1 will conduct from |
| A. | they will never conduct |
| B. | 300° to 360° |
| C. | 120° to 180° |
| D. | insufficient information |
| Answer» E. | |
| 2. |
_________ SCRs conduct from 300° to 360°. |
| A. | T1, T2, T3 |
| B. | T4, T5, T6 |
| C. | T4, T3, T2 |
| D. | T1, T6, T5 |
| Answer» C. T4, T3, T2 | |
| 3. |
For a three phase bridge inverter in the 180° mode, ___________ devices are conducting from 120° to 180°. |
| A. | T1, T6, T5 |
| B. | T2, T6, T5 |
| C. | T1, T6, T5 |
| D. | T1, T2, T3 |
| Answer» E. | |
| 4. |
In the figure given below, for 180° mode of operation if T1 is fired at 0°. Then SCRs T3 and T5 should be fired at _________ and _________ respectively. |
| A. | 180°, 360° |
| B. | 90°, 180° |
| C. | 120°, 240° |
| D. | none of the mentioned |
| Answer» D. none of the mentioned | |
| 5. |
In the 180° mode VSI, ___________ devices conduct at a time. |
| A. | 5 |
| B. | 2 |
| C. | 3 |
| D. | 4 |
| Answer» D. 4 | |
| 6. |
In inverters, to make the supply voltage constant |
| A. | an inductor is placed in series with the load |
| B. | capacitor is connected in parallel to the load side |
| C. | capacitor is connected in parallel to the supply side |
| D. | none of the mentioned |
| Answer» D. none of the mentioned | |
| 7. |
In the three-phase bridge inverter, each step consists of |
| A. | 30° |
| B. | 60° |
| C. | 90° |
| D. | will depend on the value of the firing angle |
| Answer» C. 90° | |
| 8. |
The below given inverter circuit is a __ step inverter. |
| A. | 3 |
| B. | 2 |
| C. | 6 |
| D. | none of the mentioned |
| Answer» D. none of the mentioned | |
| 9. |
A three-phase bridge inverter requires minimum of _____________ switching devices. |
| A. | 3 |
| B. | 4 |
| C. | 6 |
| D. | 8 |
| Answer» D. 8 | |
| 10. |
Identify the below given circuit. |
| A. | Three-phase bridge regulator |
| B. | Three-phase bridge type semi-converter circuit |
| C. | Three-phase bridge thyristor inverter |
| D. | Three-phase bridge IGBT inverter |
| Answer» D. Three-phase bridge IGBT inverter | |