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. |
Forced commutated CSI require _________ |
| A. | Diode |
| B. | Resistor |
| C. | Inductor |
| D. | Capacitor |
| Answer» E. | |
| 2. |
20 V rated 8 SCRs are connected in series. The operation voltage of the string is 50. Calculate the De-rating factor. |
| A. | 0.67 |
| B. | .68 |
| C. | .69 |
| D. | .70 |
| Answer» C. .69 | |
| 3. |
Calculate the string efficiency if the de-rating factor is .76. |
| A. | 24 % |
| B. | 25 % |
| C. | 26 % |
| D. | 27 % |
| Answer» B. 25 % | |
| 4. |
Calculate the r.m.s value of the fundamental component of the output current having an amplitude of 3 A for CSI. |
| A. | 2.80 A |
| B. | 2.70 A |
| C. | 2.54 A |
| D. | 3.48 A |
| Answer» C. 2.54 A | |
| 5. |
Calculate the r.m.s value of the output current having an amplitude of 2 A for CSI. |
| A. | 3 A |
| B. | 4 A |
| C. | 2 A |
| D. | 1 A |
| Answer» C. 2 A | |
| 6. |
Number of switches turned on in CSI at a single time are __________ |
| A. | 2 |
| B. | 4 |
| C. | 5 |
| D. | 3 |
| Answer» B. 4 | |
| 7. |
What is the distortion factor value in CSI? |
| A. | 0.85 |
| B. | .90 |
| C. | .95 |
| D. | .88 |
| Answer» C. .95 | |
| 8. |
T.H.D value for CSI is ________________ |
| A. | 48.43 % |
| B. | 41.15 % |
| C. | 39.15 % |
| D. | 46.48 % |
| Answer» B. 41.15 % | |
| 9. |
The output current waveform for R load in CSI is ___________ |
| A. | Square |
| B. | Triangular |
| C. | Constant |
| D. | Vertical |
| Answer» B. Triangular | |
| 10. |
Calculate the maximum frequency for ASCI using the data: R=15 kΩ, C=5 μF. |
| A. | 3.51 Hz |
| B. | 3.69 Hz |
| C. | 3.33 Hz |
| D. | 3.98 Hz |
| Answer» D. 3.98 Hz | |
| 11. |
Full form of ASCI is ___________ |
| A. | Auto sequential commutated inverter |
| B. | Auto starter commutated inverter |
| C. | Auto sequential current inverter |
| D. | Auto sequential current inserter |
| Answer» B. Auto starter commutated inverter | |
| 12. |
Calculate the minimum time period for ASCI using the data: R=12 kΩ, C=45 μF. |
| A. | 2.58 sec |
| B. | 2.16 sec |
| C. | 2.23 sec |
| D. | 2.48 sec |
| Answer» C. 2.23 sec | |
| 13. |
Which one of the element is used to make R load commutating? |
| A. | Inductor |
| B. | Capacitor |
| C. | Resistor |
| D. | Coil |
| Answer» C. Resistor | |
| 14. |
The output voltage of CSI depends upon the load. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 15. |
The use of inductor in CSI is to make source current constant. |
| A. | True |
| B. | False |
| Answer» B. False | |