MCQOPTIONS
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MCQOPTIONS
This section includes 15 Mcqs, each offering curated multiple-choice questions to sharpen your Electric Drives knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Calculate the output voltage of the Boost converter if the supply voltage is 156 V and duty cycle value is .4. |
| A. | 260 V |
| B. | 264 V |
| C. | 261 V |
| D. | 268 V |
| Answer» B. 264 V | |
| 2. |
Calculate the average value of thyristor current in 3-Φ Full wave converter for the load current=27 A and α=6°. |
| A. | 9 A |
| B. | 4 A |
| C. | 5 A |
| D. | 9 A |
| Answer» E. | |
| 3. |
Calculate the output voltage of the Buck converter if the supply voltage is 789 V and duty cycle value is .9. |
| A. | 711.1 V |
| B. | 710.1 V |
| C. | 722.2 V |
| D. | 713.2 V |
| Answer» C. 722.2 V | |
| 4. |
Calculate the value of Crest factor if Vpeak=0 V and Vr.m.s=24 V. |
| A. | 0 |
| B. | 3 |
| C. | 5 |
| D. | 8 |
| Answer» B. 3 | |
| 5. |
Calculate peak-peak voltage if Vmax=1 V and Vmin=-1 V. |
| A. | 6 V |
| B. | 2 V |
| C. | 3 V |
| D. | 1 V |
| Answer» C. 3 V | |
| 6. |
Inductor and Capacitor in Buck converter are used to ___________ |
| A. | Increase the cost |
| B. | Decrease the cost |
| C. | Filter out the harmonics |
| D. | Increase the harmonics |
| Answer» D. Increase the harmonics | |
| 7. |
Buck-Boost acts as Boost converter for duty cycle is equal to _________ |
| A. | 0.8 |
| B. | .1 |
| C. | .2 |
| D. | .4 |
| Answer» B. .1 | |
| 8. |
Buck-Boost acts as Buck converter for duty cycle is equal to _________ |
| A. | 0.9 |
| B. | .7 |
| C. | .6 |
| D. | .4 |
| Answer» E. | |
| 9. |
____________ is the boundary for C.C.M and D.C.M mode in 3-Φ Half wave bridge rectifier for R load. |
| A. | 60° |
| B. | 10° |
| C. | 80° |
| D. | 30° |
| Answer» E. | |
| 10. |
What is the formula for output voltage for Boost converter? |
| A. | 8D×Vin |
| B. | 5D×Vin |
| C. | 2D×Vin |
| D. | D×Vin |
| Answer» E. | |
| 11. |
What is the formula for output voltage for Buck-Boost converter? |
| A. | D×Vin |
| B. | Vin ÷ (1-D) |
| C. | D×Vin ÷ (1-D) |
| D. | D×Vin ÷ (1+D) |
| Answer» D. D×Vin ÷ (1+D) | |
| 12. |
What is the formula for output voltage for Buck converter? |
| A. | 8D×Vin |
| B. | 5D×Vin |
| C. | 2D×Vin |
| D. | D×Vin |
| Answer» E. | |
| 13. |
Cuk-converter is better than Buck converter in terms of the output voltage. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 14. |
Which one of the following device is uncontrolled? |
| A. | SCR |
| B. | MOSFET |
| C. | Diode |
| D. | TRIAC |
| Answer» D. TRIAC | |
| 15. |
Choppers are used to control the DC voltage level. |
| A. | True |
| B. | False |
| Answer» B. False | |