MCQOPTIONS
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MCQOPTIONS
This section includes 10 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. |
Solid State Relays (SSRs) have |
| A. | moving parts |
| B. | no moving parts |
| C. | a coil |
| D. | a contactor |
| Answer» C. a coil | |
| 2. |
A single-phase ac switch is used in between a 230 V source and load of 2 kW and 0.8 lagging power factor. Determine the rms current rating required by the SCR. Use the factor of safety = 2. |
| A. | 10.87 A |
| B. | 87 A |
| C. | 21.74 A |
| D. | 32 A |
| Answer» D. 32 A | |
| 3. |
___________ can be used as a dc static switch. |
| A. | GTO |
| B. | Transistor |
| C. | Both GTO and transistor |
| D. | TRIAC |
| Answer» D. TRIAC | |
| 4. |
_________ can be used as a single phase static ac switch. |
| A. | Diode |
| B. | SCR |
| C. | DIAC |
| D. | TRAIC |
| Answer» E. | |
| 5. |
For high power applications _________ are used as static switches whereas for low power applications __________ are used. |
| A. | Transistors, SCRs |
| B. | SCRs, transistors |
| C. | Diodes, transistors |
| D. | SCRs, diodes |
| Answer» C. Diodes, transistors | |
| 6. |
Two six pulse converters used for bipolar HVDC transmission system, are rated at 1000 MW, +- 200 kV. Find the rms current rating required for the SCRs. |
| A. | 2500 A |
| B. | 1350 A |
| C. | 1445 A |
| D. | none of the mentioned |
| Answer» D. none of the mentioned | |
| 7. |
Two six pulse converters used for bipolar HVDC transmission system, are rated at 1000 MW, +- 200 kV. Find the dc current in the transmission line. |
| A. | 500 A |
| B. | 25 A |
| C. | 2500 A |
| D. | 5 A |
| Answer» D. 5 A | |
| 8. |
Two six pulse converters used for bipolar HVDC transmission system, are rated at 1000 MW, +- 200 kV. What is the dc transmission voltage? |
| A. | 200 kV |
| B. | 400 kV |
| C. | 500 kV |
| D. | 100 kV |
| Answer» C. 500 kV | |
| 9. |
In HVDC transmission lines |
| A. | both the stations operate as an inverter |
| B. | both the stations operate as a converter |
| C. | one acts as a converter and other as an inverter |
| D. | depends upon the type of the load |
| Answer» D. depends upon the type of the load | |
| 10. |
HVDC transmission lines are __________ as compared to HVAC lines. |
| A. | difficult to erect |
| B. | more expensive for long distances |
| C. | more expensive for short distances |
| D. | less expensive for short distances |
| Answer» D. less expensive for short distances | |