Protection against overvoltage overvoltage causes of overvoltage lightning types of lightning strokes harmful effect of lightning protection against lightning

19. MCQ
1) The most severe surge on the line are produced by …………….
2) Arcing ground can be prevented by ………………….
3) For successful working of ground wire the footing resistance of tower
should be ………..
4) The …………. Lighting strokes are very rare on the power system.

20. Answers
1. Lightning
2. Ear thing the neutral
3. Low
4. direct