- (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
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- (A) depth of the electrode
- (B) moisture
- (C) Nacl
- (D) all the above
- (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
- (A) to provide low impedance
- (B) to discharge the charging capacitance to ground
- (C) protection for operating personnel
- (D) both (B) and (C)
- (A) increase
- (B) decrease
- (C) does not affect
- (D) none of the above
- (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
- (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
- (A) 500 ohms
- (B) 1000 ohms
- (C) 1500 ohms
- (D) 2000 ohms
- (A) 2.3 A
- (B) 780 mA
- (C) 47 mA
- (D) 7.06 A
- (A) 48 mA
- (B) 12 mA
- (C) 0 A
- (D) 3 mA
