MCQOPTIONS
Saved Bookmarks
MCQOPTIONS
This section includes 20 Mcqs, each offering curated multiple-choice questions to sharpen your Electrical Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
The size of the earth or ground wire is based on the |
| A. | maximum fault current carrying through the ground wire |
| B. | rated current carrying capacity of the service line |
| C. | depends on the soil resistance |
| D. | both (A) and (C) |
| Answer» E. | |
| 2. |
Earth wire or ground wire is made of |
| A. | copper |
| B. | aluminium |
| C. | iron |
| D. | galvanized steel |
| Answer» E. | |
| 3. |
Average resistance of human body is |
| A. | 500 ohms |
| B. | 1000 ohms |
| C. | 1500 ohms |
| D. | 2000 ohms |
| Answer» C. 1500 ohms | |
| 4. |
When earth fault occurs |
| A. | voltage potential at the earth mat increases due to grounding |
| B. | voltage potential at the earth mat decreases due to grounding |
| C. | voltage potential at the earth mat remains zero irrespective of fault |
| D. | none of the above |
| Answer» B. voltage potential at the earth mat decreases due to grounding | |
| 5. |
Factors on which soil resistance depends |
| A. | depth of the electrode |
| B. | moisture |
| C. | Nacl |
| D. | all the above |
| Answer» E. | |
| 6. |
For an EHV equipment for maintenance first it should be isolated and connected to ground because |
| A. | to provide low impedance |
| B. | to discharge the charging capacitance to ground |
| C. | protection for operating personnel |
| D. | both (B) and (C) |
| Answer» E. | |
| 7. |
Ground resistance should be designed such that |
| A. | grounding resistance should be as low as possible |
| B. | grounding resistance should be as high as possible |
| C. | grounding resistance should be always zero |
| D. | none of the above |
| Answer» B. grounding resistance should be as high as possible | |
| 8. |
Generally grounding is provided for |
| A. | only for the safety of the equipment |
| B. | only for the safety of the operating personnel |
| C. | both (A) and (B) |
| D. | none of the above |
| Answer» D. none of the above | |
| 9. |
The size of the earth or ground wire is based on the~! |
| A. | maximum fault current carrying through the ground wire |
| B. | rated current carrying capacity of the service line |
| C. | depends on the soil resistance |
| D. | both (A) and (C) |
| Answer» E. | |
| 10. |
*$_Earth wire or ground wire is made of? |
| A. | copper |
| B. | aluminium |
| C. | iron |
| D. | galvanized steel |
| Answer» E. | |
| 11. |
*/*_For an EHV equipment for maintenance first it should be isolated and connected to ground because? |
| A. | to provide low impedance |
| B. | to discharge the charging capacitance to ground |
| C. | protection for operating personnel |
| D. | both (B) and (C) |
| Answer» E. | |
| 12. |
%_Average resistance of human body is_% |
| A. | 500 ohms |
| B. | 1000 ohms |
| C. | 1500 ohms |
| D. | 2000 ohms |
| Answer» C. 1500 ohms | |
| 13. |
_ Ground resistance should be designed such that$? |
| A. | grounding resistance should be as low as possible |
| B. | grounding resistance should be as high as possible |
| C. | grounding resistance should be always zero |
| D. | none of the above |
| Answer» B. grounding resistance should be as high as possible | |
| 14. |
_When earth fault occurs$? |
| A. | voltage potential at the earth mat increases due to grounding |
| B. | voltage potential at the earth mat decreases due to grounding |
| C. | voltage potential at the earth mat remains zero irrespective of fault |
| D. | none of the above |
| Answer» B. voltage potential at the earth mat decreases due to grounding | |
| 15. |
_Generally grounding is provided for$? |
| A. | only for the safety of the equipment |
| B. | only for the safety of the operating personnel |
| C. | both (A) and (B) |
| D. | none of the above |
| Answer» D. none of the above | |
| 16. |
Factors on which soil resistance depends$? |
| A. | depth of the electrode |
| B. | moisture |
| C. | Nacl |
| D. | all the above |
| Answer» E. | |
| 17. |
Factors on which soil resistance depends? |
| A. | depth of the electrode |
| B. | moisture |
| C. | Nacl |
| D. | all the above |
| Answer» E. | |
| 18. |
Moisture content in the soil _______ the earth soil resistance |
| A. | increase |
| B. | decrease |
| C. | does not affect |
| D. | none of the above |
| Answer» C. does not affect | |
| 19. |
The objective of earthing or grounding is |
| A. | to provide as low resistance possible to the ground |
| B. | to provide as high resistance possible to the ground |
| C. | to provide flow of positive, negative and zero sequence currents |
| D. | none of the above |
| Answer» B. to provide as high resistance possible to the ground | |
| 20. |
When the 3-phase system is not grounded and if Single Line to Ground fault occurs, the voltage of the other two healthy phases will |
| A. | Increases |
| B. | Decreases |
| C. | Remains unaffected |
| D. | none of the above |
| Answer» B. Decreases | |