Statements of Fact Quiz I
From the 2012 Revised Coal Mine Rescue Statements of Fact
Progress Indicator:
 
Question 2 of 25
2. Disconnecting switches shall be installed underground in all main direct-current power circuits within 500 feet of the bottom of shafts, boreholes or at other places where main power circuits enter a mine.
Choices:
- True
- False
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