MCQOPTIONS
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MCQOPTIONS
This section includes 17 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. |
Use of additional shunt capacitor can be made for increasing the capability of the line as it will ______ |
| A. | reduce surge impedance |
| B. | increase phase shift |
| C. | increase the angle α |
| D. | all of the mentioned |
| Answer» B. increase phase shift | |
| 2. |
The transmission capacity of a line at 50 Hz frequency as compared to that at 60 Hz is ______ |
| A. | higher |
| B. | lower |
| C. | same |
| D. | can’t be decided |
| Answer» B. lower | |
| 3. |
What will happen when the characteristic impedance of a transmission line is equal t the load impedance ______________ |
| A. | all the given energy will be absorbed by the load |
| B. | all the given energy will be transferred to load |
| C. | system will undergo resonance |
| D. | all the given energy will be lost in transmission losses. |
| Answer» B. all the given energy will be transferred to load | |
| 4. |
Characteristic impedance of a transmission line depends upon ____________ |
| A. | geometrical configurations of conductor |
| B. | shape of conductor |
| C. | conductivity |
| D. | surrounding of the conductor. |
| Answer» B. shape of conductor | |
| 5. |
Identify the characteristics of the Ferranti effect.(i) Flow of unduly heavy current(ii) It occurs at unloaded condition(iii) Rise in the receiving end voltage |
| A. | (i) ad (ii) |
| B. | (ii) ad (iii) |
| C. | (i) ad (iii) |
| D. | (ii) ad (iii) |
| Answer» E. | |
| 6. |
WHAT_WILL_HAPPEN_WHEN_THE_CHARACTERISTIC_IMPEDANCE_OF_A_TRANSMISSION_LINE_IS_EQUAL_T_THE_LOAD_IMPEDANCE_______________?$ |
| A. | all the given energy will be absorbed by the load |
| B. | all the given energy will be transferred to load |
| C. | system will undergo resonance |
| D. | all the given energy will be lost in transmission losses. |
| Answer» B. all the given energy will be transferred to load | |
| 7. |
Use of additional shunt capacitor can be made for increasing the capability of the line as it will ______$ |
| A. | reduce surge impedance |
| B. | increase phase shift |
| C. | increase the angle α |
| D. | all of the mentioned |
| Answer» B. increase phase shift | |
| 8. |
The transmission capacity of a line at 50 Hz frequency as compared to that at 60 Hz is ______$ |
| A. | higher |
| B. | lower |
| C. | same |
| D. | can’t be decided |
| Answer» B. lower | |
| 9. |
To increase the transmission capability of a high voltage long line ____________ |
| A. | series reactance can be reduced |
| B. | resistance can be increased |
| C. | resistance can be decreased |
| D. | shunt admittance can be reduced |
| Answer» B. resistance can be increased | |
| 10. |
Characteristic impedance of a transmission line depends upon ___________? |
| A. | geometrical configurations of conductor |
| B. | shape of conductor |
| C. | conductivity |
| D. | surrounding of the conductor. |
| Answer» B. shape of conductor | |
| 11. |
The impedance known as surge impedance and characteristic impedance are same. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 12. |
For a general transmission system, the calculated parameter A for a medium transmission line has magnitude _____________ |
| A. | close to but less than 1 |
| B. | close to but more than 1 |
| C. | average of B and C parameter |
| D. | none of the mentioned |
| Answer» B. close to but more than 1 | |
| 13. |
The transmission line parameters ABCD for a three phase transposed line with passive and linear elements are ____________ |
| A. | always equal |
| B. | never same |
| C. | A and D are same |
| D. | B and C are same |
| Answer» B. never same | |
| 14. |
Ferranti effect is very prominent in occurrence in what type of transmission line? |
| A. | Long and unloaded |
| B. | Short and loaded |
| C. | Long and unloaded |
| D. | Short and unloaded |
| Answer» B. Short and loaded | |
| 15. |
Identify the characteristics of the Ferranti effect. |
| A. | Flow of unduly heavy current |
| B. | It occurs at unloaded condition |
| C. | Rise in the receiving end voltage |
| D. | (i) ad (ii) |
| Answer» E. | |
| 16. |
At the no load conditions, the current is detected in the transmission line. This can be attributed due to __________ |
| A. | capacitance effect |
| B. | proximity effect |
| C. | corona effect |
| D. | back flow through earth |
| Answer» B. proximity effect | |
| 17. |
For a transmission line of length not more than 80 km, then it is convenient to lump the capacitance at ________ |
| A. | receiving end |
| B. | sending end |
| C. | midpoint |
| D. | anywhere long the line |
| Answer» B. sending end | |