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
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
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
Moisture content in the soil __________ the earth soil resistance?
A. increase
B. decrease
C. does not affect
D. none of the above
A. Increases
B. Decreases
C. Remains unaffected