A. to provide low impedance
B. to discharge the charging capacitance to ground
C. protection for operating personnel
D. both (B) and (C)
Related Mcqs:
- 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 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 - 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) - Average resistance of human body is____________?
A. 500 ohms
B. 1000 ohms
C. 1500 ohms
D. 2000 ohms - 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 - 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 - Factors on which soil resistance depends_______________?
A. depth of the electrode
B. moisture
C. Nacl
D. all the above - 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
