MCQOPTIONS
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MCQOPTIONS
This section includes 13 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. |
Force-commutated CSIs need |
| A. | capacitors for their commutation |
| B. | inductors for their commutation |
| C. | diodes for their commutation |
| D. | none of the mentioned |
| Answer» B. inductors for their commutation | |
| 2. |
In a 3-phase VSI operating in square-wave mode, the output line voltage is free from |
| A. | 3rd harmonic |
| B. | 7th harmonic |
| C. | 11th harmonic |
| D. | 13th harmonic |
| Answer» B. 7th harmonic | |
| 3. |
T1, T2 are triggered at 0 and T3, T4 at T/2. If both the pairs of SCRs conduct for equal duration and the load consists of a capacitor. Then |
| A. | the load current waveform is a square wave |
| B. | the load voltage waveform is a square wave |
| C. | the load current is constant dc |
| D. | the load voltage is constant dc |
| Answer» B. the load voltage waveform is a square wave | |
| 4. |
In the below shown, the ideal single-phase CSI circuit has constant input source current of I amps. The output current waveform varies from |
| A. | 2I to – 2I |
| B. | I/2 to –I/2 |
| C. | I to –I |
| D. | none of the mentioned |
| Answer» D. none of the mentioned | |
| 5. |
In current source inverters |
| A. | L filter is used after the CSI (load side) |
| B. | L filter is used before the CSI (input side) |
| C. | C filter is used after the CSI (load side) |
| D. | C filter is used before the CSI (input sid |
| E. | L filter is used before the CSI (input side)c) C filter is used after the CSI (load side)d) C filter is used before the CSI (input side) |
| Answer» C. C filter is used after the CSI (load side) | |
| 6. |
In current source inverters (CSIs), the output voltage’s |
| A. | amplitude depends upon the load impedance |
| B. | waveform depends upon the load impedance |
| C. | amplitude as well as the nature of the waveform depends on the load |
| D. | both amplitude and waveform are independent of the load impedance |
| Answer» D. both amplitude and waveform are independent of the load impedance | |
| 7. |
IN_A_3-PHASE_VSI_OPERATING_IN_SQUARE-WAVE_MODE,_THE_OUTPUT_LINE_VOLTAGE_IS_FREE_FROM?$ |
| A. | 3rd harmonic |
| B. | 7th harmonic |
| C. | 11th harmonic |
| D. | 13th harmonic |
| Answer» B. 7th harmonic | |
| 8. |
Force-commutated CSIs need$ |
| A. | capacitors for their commutation |
| B. | inductors for their commutation |
| C. | diodes for their commutation |
| D. | none of the mentioned |
| Answer» B. inductors for their commutation | |
| 9. |
A CSI converters |
| A. | the input dc current to an an current at output |
| B. | the input ac current to dc current at output |
| C. | the input dc current to amplified dc current at the output |
| D. | the input ac current to amplified ac current at the output |
| Answer» B. the input ac current to dc current at output | |
| 10. |
In current source inverters (CSIs), the output voltage’s$ |
| A. | amplitude depends upon the load impedance |
| B. | waveform depends upon the load impedance |
| C. | amplitude as well as the nature of the waveform depends on the load |
| D. | both amplitude and waveform are independent of the load impedance |
| Answer» D. both amplitude and waveform are independent of the load impedance | |
| 11. |
In current source inverters (CSIs) |
| A. | the amplitude of the output current is independent of the load |
| B. | the amplitude of the output current dependents on the load |
| C. | the amplitude of the output voltage is independent of the load |
| D. | none of the mentioned |
| Answer» B. the amplitude of the output current dependents on the load | |
| 12. |
In voltage source inverters (VSIs), the output currents _____________ |
| A. | amplitude depends upon the load impedance |
| B. | waveform depends upon the load impedance |
| C. | amplitude as well as the nature of the waveform depends on the load |
| D. | both amplitude and waveform are independent of the load impedance |
| Answer» D. both amplitude and waveform are independent of the load impedance | |
| 13. |
In voltage source inverters (VSIs), the amplitude of the output voltage is |
| A. | independent of the load |
| B. | dependent on the load |
| C. | dependent only on L loads |
| D. | none of the mentioned |
| Answer» B. dependent on the load | |