MCQOPTIONS
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MCQOPTIONS
This section includes 10 Mcqs, each offering curated multiple-choice questions to sharpen your Power Systems knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
A static synchronous series compensator injects: |
| A. | a current in quadrature with the system voltage |
| B. | a voltage in quadrature with the line current |
| C. | a current in phase with the line current |
| D. | a voltage in phase with the system voltage |
| Answer» C. a current in phase with the line current | |
| 2. |
Directions: It consists of two statements, one labelled as the ‘Statement (I)’ and the other as ‘Statement (II)’. You are to examine these two statements carefully and select the answer using the codes given below:Statement (I): No compensation is needed in HVDC lines, unlike EHV-AC system where series and/or shunt compensation is required.Statement (II): Charging current is absent in HVDC system. |
| A. | Both Statement (I) and Statement (II) are individually true and Statement (II) is the correct explanation of Statement (I) |
| B. | Both Statement (I) and Statement (II) are individually true but Statement (II) is NOT the correct explanation of Statement (I) |
| C. | Statement (I) is true but Statement (II) is false |
| D. | Statement (I) is false but Statement (II) is true |
| Answer» B. Both Statement (I) and Statement (II) are individually true but Statement (II) is NOT the correct explanation of Statement (I) | |
| 3. |
Directions: It consists of two statements, one labeled as the ‘Statement (I)’ and the other as ‘Statement (II)’. Examine these two statements carefully and select the answer using the codes given below:Statement (I): HVDC transmission is advantageous over HVAC for large power transfer over long lines.Statement (II): HVDC requires conversion equipment at two ends of the transmission line. |
| A. | Statement (I) and Statement (II) are individually true and statement (II) is the correct explanation of statement (II) |
| B. | Statement (I) and Statement (II) are individually true but statement (II) is not the correct explanation of statement (I) |
| C. | Statement (I) is true but statement (II) is false |
| D. | Statement (I) is false but statement (II) is true |
| Answer» C. Statement (I) is true but statement (II) is false | |
| 4. |
High voltage DC (HVDC) transmission is mainly used for |
| A. | bulk power transmission over long distances. |
| B. | inter connecting two systems with the same nominal frequency. |
| C. | eliminating reactive power requirement in the operation |
| D. | minimizing harmonics at the converter stations |
| Answer» B. inter connecting two systems with the same nominal frequency. | |
| 5. |
Identify a valid disadvantage of HVDC transmission lines. |
| A. | High radio interference |
| B. | Expensive converters |
| C. | High corona loss |
| D. | Skin effect |
| Answer» C. High corona loss | |
| 6. |
A bipolar, two terminal HVDC link has a 12-pulse converter per pole at each end. The system rating is 1200 MW at ± 500 kV at rectifier end. Line reactance per pole is 4 Ω. The link current will be |
| A. | 600 A |
| B. | 900 A |
| C. | 1200 A |
| D. | 1600 A |
| Answer» D. 1600 A | |
| 7. |
Back to back HVDC is used to |
| A. | decrease line losses |
| B. | increase the transmission capability |
| C. | reduce voltage drop |
| D. | give stable interconnection |
| Answer» E. | |
| 8. |
Fault location in an HV cable is done by |
| A. | Voltage withstand test |
| B. | Partial discharge scanning tests |
| C. | Life tests |
| D. | Impulse testing |
| Answer» C. Life tests | |
| 9. |
A bipolar DC line has _________ conductor(s). |
| A. | three |
| B. | one |
| C. | four |
| D. | two |
| Answer» E. | |
| 10. |
Consider the following advantages with respect of HVDC transmission:1. Long distance transmission2. Low cost of transmission3. Higher efficiencyWhich of the above advantages are correct? |
| A. | 1 and 2 only |
| B. | 1 and 3 only |
| C. | 2 and 3 only |
| D. | 1, 2 and 3 |
| Answer» E. | |