Gases Commonly Encountered in Underground Mines (16)

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Question 1 of 20

1.  __________ may be found anywhere, but is most likely to be encountered in virgin coal, roof cavities, high places, abandoned workings, and places that are improperly ventilated.

  1. Carbon Dioxide
  2. Sulfur Dioxide
  3. Methane
  4. Hydrogen Sulfide

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