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As per IE rules, all earthing systems belonging to the supplier shall be tested for resistance on a dry day during the dry season not less than _____.

  • A.once every year
  • B.once every two years
  • C.Twice every year
  • D.Once every five years

Answer: B

The key gives once every two years for the testing of earthing systems of the supplier. The rule requires the test to be made on a dry day during the dry season, when the soil resistance is highest, so that the result is the worst case. I could not check the interval in the text of the rules, so the answer follows the key.

'Once every year', 'twice every year' and 'once every five years' are the other intervals offered. The second option is the one given.

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