ELECTRICIAN 1st YEAR MODULE – Wiring Installation and Earthing

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Question 1 of 28

1. What happens when a person receives a 20mA shock current?

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Question 2 of 28

2. Where are service connection supply leads connected in a consumer main board?

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3. What type of test is performed in wiring installation?

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4. What type of test is conducted in domestic wiring installation?

 

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5. Where is system earthing done?

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Question 6 of 28

6. Advantage of stranded conductor over solid conductor?

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7. Which method is used to reduce earth resistance value in an existing earth pit?

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Question 8 of 28

8. What is the function of current reverser in earth resistance testers?

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9. What is the advantage of crimping?

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Question 10 of 28

10. For which electrical equipment are 'L' series type MCBs used?

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Question 11 of 28

11. Which earth resistance measurement method is illustrated?

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Question 12 of 28

12. Which instrument is used to test new domestic wiring installation?

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13. How can earth resistance be reduced?

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Question 14 of 28

14. What is the formula to find voltage drop in an AC single-phase wiring circuit?

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15. Why is system earthing different from equipment earthing?

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16. What determines ohmmeter needle deflection in earth testers?

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17. Why is AC required to measure earth resistance using an earth resistance tester?

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18. Which principle does the earth resistance tester work on?

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Question 19 of 28

19. What causes lamps to glow dim and motors to run slow in domestic wiring?

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Question 20 of 28

20. What is the maximum permissible load for a power sub-circuit as per IE rules?

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Question 21 of 28

21. How to control harmonic distortions in neutral connections per IE rules?

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22. What is the permissible leakage current in domestic wiring installation?

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Question 23 of 28

23. Why does megger's pointer not stabilize at zero when unused?

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Question 24 of 28

24. Why is AC supplied for earth resistance measurement?

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Question 25 of 28

25. What test is carried out using a megger?

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26. What is the megger reading in a dead short wiring installation?

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27. In which wiring installation is system earthing done?

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Question 28 of 28

28. What is the minimum size of copper earth continuity conductor used in single-phase domestic wiring as per BIS?

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