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Grounding or Earthing Quiz Questions Answers
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Question 1 of 26
1. Question
1 pointsIn any system (grounding or ungrounding), a ____ coupling exist between the system conductors and the adjacent grounding surfaces:
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Question 2 of 26
2. Question
1 pointsDuring fault condition, proper earthing will rise the earth potential
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Question 3 of 26
3. Question
1 pointsA delta-delta connected transformer is grounded with the help of zig-zag transformer:
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Question 4 of 26
4. Question
1 pointsHigh Resistance grounding typically limits ground fault current under to _____:
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Question 5 of 26
5. Question
1 pointsWhen the 3-phase system is not grounded and if Single Line to Ground fault occurs, the voltage of the other two healthy phases will:
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Question 6 of 26
6. Question
1 pointsIn order to achieve Continuity of the operation even during fault condition which type of the configuration is preferred:
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Question 7 of 26
7. Question
1 pointsStep potential is associated with the equipment and human body contact potential difference
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Question 8 of 26
8. Question
1 pointsIf the moisture content in the soil increases, resistivity of the soil rises
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Question 9 of 26
9. Question
1 pointsIn which of the following system, identification of fault is tedious:
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Question 10 of 26
10. Question
1 pointsIn an ungrounded system the occurrence of second fault will more likely be ____ than grounded system fault
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Question 11 of 26
11. Question
1 pointsOur earth is a negatively charged body
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Correct
Earth is neutrally charged
Incorrect
Earth is neutrally charged
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Question 12 of 26
12. Question
1 pointsHigh voltages originated due to Line to Ground faults in ungrounded system will damage which of the following:
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Question 13 of 26
13. Question
1 pointsWhich of the following solution is used to reduces the earth’s resistivity
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Question 14 of 26
14. Question
1 pointsElectrical system is grounded in order to protect ___ from faults
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Question 15 of 26
15. Question
1 pointsThe grounded conductor can be used as the current carrying conductor to accommodate all the non neutral related loads
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Question 16 of 26
16. Question
1 pointsIn a ungrounded system, if a line to ground fault occurs on one phase, the charging currents (capacitive currents) flowing through the other two healthy phases will be ____ times the normal value:
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Question 17 of 26
17. Question
1 pointsGrounding resistor for high resistance grounding shall be designed such that the ground fault current limit is _____ than the system’s total capacitance to ground charging current inorder to avoid overvoltages:
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Question 18 of 26
18. Question
1 pointsThe ungrounded system, in reality is a ______ grounding system:
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Question 19 of 26
19. Question
1 pointsA resistance shall not be put between the neutral and the ground in a 3-phase circuit
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Question 20 of 26
20. Question
1 pointsThe means of bonding shall provide ampacity to flow fault current
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Question 21 of 26
21. Question
1 pointsThe neutral of any grounded system will permit the flow of current through the conductor when unbalanced load is connected
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Question 22 of 26
22. Question
1 pointsWhich of the following type of grounding system has the highest probability for escalation of ground fault to phase to phase and three phase arcing fault, particularly for low voltage system:
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Question 23 of 26
23. Question
1 pointsIn a ungrounded system, during the fault the protective relays may not able to operate because of the low fault current:
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Question 24 of 26
24. Question
1 pointsStep Potential is associated with the potential between the two feet separated by about 1 meter
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Question 25 of 26
25. Question
1 pointsElectrical resistivity is inversely proportional to the depth of grounding / earthing rod into the ground
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Question 26 of 26
26. Question
1 pointsWhich of the following system produces highest ground fault current when a fault to ground occurs:
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