MCQOPTIONS
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MCQOPTIONS
This section includes 15 Mcqs, each offering curated multiple-choice questions to sharpen your Transformers knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Surge protection can’t be implemented by the addition of rod gaps. |
| A. | True |
| B. | False |
| Answer» C. | |
| 2. |
Surge impedance can be calculated as _________ |
| A. | L/C |
| B. | C/L |
| C. | √(L/C) |
| D. | √(C/L) |
| Answer» D. √(C/L) | |
| 3. |
High voltage, high frequency surges can occur in the system due to _________________ |
| A. | atmospheric disturbances |
| B. | line faults |
| C. | manual faults |
| D. | line to neutral faults |
| Answer» B. line faults | |
| 4. |
Mechanical stress produced in the circuit ______________ |
| A. | directly proportional to the square of the voltage |
| B. | inversely proportional to the square of the voltage |
| C. | directly proportional to the square of the currents |
| D. | inversely proportional to the square of the currents |
| Answer» D. inversely proportional to the square of the currents | |
| 5. |
HIGH_VOLTAGE,_HIGH_FREQUENCY_SURGES_CAN_OCCUR_IN_THE_SYSTEM_DUE_TO__________________?$ |
| A. | atmospheric disturbances |
| B. | line faults |
| C. | manual faults |
| D. | line to neutral faults |
| Answer» B. line faults | |
| 6. |
Surge protection can’t be implemented by the addition of rod gaps.$# |
| A. | True |
| B. | False |
| Answer» C. | |
| 7. |
Surge_impedance_can_be_calculated_as__________$ |
| A. | L/C |
| B. | C/L |
| C. | ‚àö(L/C) |
| D. | ‚àö(C/L) |
| Answer» D. ‚Äö√Ñ√∂‚àö‚Ć‚àö‚àÇ(C/L) | |
| 8. |
Mechanical stress produced in the circuit _____________? |
| A. | directly proportional to the square of the voltage |
| B. | inversely proportional to the square of the voltage |
| C. | directly proportional to the square of the currents |
| D. | inversely proportional to the square of the currents |
| Answer» D. inversely proportional to the square of the currents | |
| 9. |
System-short circuits may occur due to ________________ |
| A. | Line to line contacts |
| B. | Line to neutral contacts if neutral is not earthed |
| C. | Line to neutral contacts if neutral is earthed |
| D. | LL and LG faults |
| Answer» E. | |
| 10. |
Ferroresonanace can be added in __________________ |
| A. | faults due to system |
| B. | faults in the transformer |
| C. | manual faults |
| D. | other faults |
| Answer» B. faults in the transformer | |
| 11. |
How many types of faults can occur in a system? |
| A. | 2 |
| B. | 3 |
| C. | 5 |
| D. | Many |
| Answer» C. 5 | |
| 12. |
Any transformer needs to be protected from __________ |
| A. | transformer faults |
| B. | faults occurring on the transformer connected systems |
| C. | faults within and on system |
| D. | other faults |
| Answer» D. other faults | |
| 13. |
Transformers are subjected to transients because _________________ |
| A. | open-circuit currents |
| B. | short-circuit currents |
| C. | inrush currents |
| D. | both OC and SC currents |
| Answer» E. | |
| 14. |
Voltmeter connected across two similar terminals of parallel operated transformers should give _______ |
| A. | 0 reading |
| B. | maximum reading |
| C. | sum of individual reading |
| D. | division of individual readings |
| Answer» B. maximum reading | |
| 15. |
Satisfactory parallel operation of transformers needs ______ |
| A. | 5 conditions |
| B. | many conditions |
| C. | 10 conditions |
| D. | 7 conditions |
| Answer» C. 10 conditions | |