MCQOPTIONS
Saved Bookmarks
MCQOPTIONS
This section includes 12 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 single-phase McMurray-Bedford type bridge inverter is a/an |
| A. | auxiliary-commutated inverter |
| B. | complementary-commutated inverter |
| C. | supplementary-commutated inverter |
| D. | none of the mentioned |
| Answer» C. supplementary-commutated inverter | |
| 2. |
The McMurray-Bedford half-bridge inverter requires |
| A. | 4 SCRs, 2 diodes, 2 capacitors and 2 inductors |
| B. | 4 SCRs, 4 diodes, 2 capacitors and 2 inductors |
| C. | 2 SCRs, 4 diodes, 2 capacitors and 1 inductor |
| D. | 2 SCRs, 2 diodes, 2 capacitors and 2 inductors |
| Answer» E. | |
| 3. |
Let Im be the maximum load current and Vm be the minimum supply voltage value. Than the expression for the design of commutation circuit parameters in a single-phase modified McMurray half-bridge inverter is given by |
| A. | (1.5 x Im)/Vm |
| B. | Im/(1.5 x Vm) |
| C. | Vm/(1.5 x Im) |
| D. | (1.5 x Vm)/Im |
| Answer» D. (1.5 x Vm)/Im | |
| 4. |
THE_MCMURRAY-BEDFORD_HALF-BRIDGE_INVERTER_REQUIRES?$ |
| A. | 4 SCRs, 2 diodes, 2 capacitors and 2 inductors |
| B. | 4 SCRs, 4 diodes, 2 capacitors and 2 inductors |
| C. | 2 SCRs, 4 diodes, 2 capacitors and 1 inductor |
| D. | 2 SCRs, 2 diodes, 2 capacitors and 2 inductors |
| Answer» E. | |
| 5. |
The single-phase McMurray-Bedford type bridge inverter is a/an$ |
| A. | auxiliary-commutated inverter |
| B. | complementary-commutated inverter |
| C. | supplementary-commutated inverter |
| D. | none of the mentioned |
| Answer» C. supplementary-commutated inverter | |
| 6. |
How many diodes are there in total in the single-phase, modified McMurray full-bridge inverter? |
| A. | 4 |
| B. | 6 |
| C. | 8 |
| D. | 10 |
| Answer» D. 10 | |
| 7. |
In the single-phase modified McMurray full-bridge inverter, for commutating the main SCRs T1 and T2 |
| A. | The capacitor is charged |
| B. | TA1 is triggered |
| C. | The commutation circuit is switched on |
| D. | TA1 and TA2 are triggered |
| Answer» E. | |
| 8. |
The number of diodes, SCRs and other components in full-bridge inverter McMurray inverter is ____________ of those in half-bridge McMurray inverter. |
| A. | same |
| B. | double |
| C. | three times |
| D. | none of the mentioned |
| Answer» C. three times | |
| 9. |
Which elements are not present in the original McMurray inverter but are present in the modified McMurray inverters? |
| A. | Two auxiliary thyristors and the di/dt inductor |
| B. | Two auxiliary diodes and the damping resistor |
| C. | One auxiliary SCR and one auxiliary diode |
| D. | None of the mentioned |
| Answer» C. One auxiliary SCR and one auxiliary diode | |
| 10. |
Forced commutation requires |
| A. | a precharged inductor |
| B. | a precharged capacitor |
| C. | an overdamped RLC load |
| D. | a very high frequency ac source |
| Answer» C. an overdamped RLC load | |
| 11. |
The McMurray circuit is a |
| A. | commutation circuit |
| B. | force commutated VSI |
| C. | self commutated VSI |
| D. | none of the mentioned |
| Answer» C. self commutated VSI | |
| 12. |
In voltage fed thyristor inverters __________ commutation is required. |
| A. | load |
| B. | forced |
| C. | self |
| D. | any commutation technique can be used |
| Answer» C. self | |