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Mine Law - 30 CFR, Part 77
Sample test questions for Underground Mine Electrical Certification

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Question 1 of 5

1.  Where high voltage power lines are installed over driveways, haulage ways and railroad tracks they must be installed a minimum of:

  1. 30 feet above ground
  2. 15 feet above ground
  3. 50 feet above ground
  4. 100 feet above ground