MCQOPTIONS
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MCQOPTIONS
This section includes 9 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. |
In non-circulating current mode dual converters, the circulating current is avoided by |
| A. | connecting a series reactor |
| B. | maintaining α1 + α2 = 180° |
| C. | operating only one converter |
| D. | adding an extra SCR |
| Answer» D. adding an extra SCR | |
| 2. |
For a single-phase dual converter, with converters C1 and C2 connected in anti-parallel, which relation among the following is true to keep the average voltages from C1 and C2 equal? C1 and C2 have firing angles α1 and α2 respectively. |
| A. | α1 = α2 |
| B. | α1 + α2 = 360° |
| C. | α1 + α2 = 180° |
| D. | none of the mentioned |
| Answer» D. none of the mentioned | |
| 3. |
In the below given circuit, the right side converter C2 operates in the ___ and ___ quadrant. |
| A. | second, fourth |
| B. | first, fourth |
| C. | second, third |
| D. | first, third |
| Answer» D. first, third | |
| 4. |
Find the error in the below given dual converter circuit.i) Load is not connected in the right positionii) Only 4 SCRs must be usediii) Voltage source is not connected for one of the converter circuitiv) Voltage source is not connected in the proper place |
| A. | All 4 |
| B. | Both (i) and (iv) |
| C. | Both (iii) and (iv) |
| D. | Both (ii) and (iii)View Answer |
| Answer» D. Both (ii) and (iii)View Answer | |
| 5. |
A single full converter alone can given a |
| A. | four quadrant operation |
| B. | three quadrant operation |
| C. | two quadrant operation |
| D. | none of the mentioned |
| Answer» D. none of the mentioned | |
| 6. |
The four quadrant operation of dual converters can be obtained by |
| A. | moving the mechanical lever |
| B. | adding inductance to the circuit |
| C. | changing the firing angle value |
| D. | none of the mentioned |
| Answer» D. none of the mentioned | |
| 7. |
The major advantage of using dual converters is that |
| A. | it is cheaply available |
| B. | it has better pf |
| C. | no mechanical switch is required to change the mode of operation |
| D. | its operating frequency is very high |
| Answer» D. its operating frequency is very high | |
| 8. |
A dual converters has |
| A. | two full converters in series |
| B. | two half converters in series |
| C. | two full converters in anti-parallel |
| D. | two half converters in anti-parallel |
| Answer» D. two half converters in anti-parallel | |
| 9. |
Dual converters provide |
| A. | two quadrant operation |
| B. | three quadrant operation |
| C. | four quadrant operation |
| D. | none of the mentioned |
| Answer» D. none of the mentioned | |