Mine Gases - No. 4

Progress Indicator:
Question 1 of 20

1.  What gas is most likely found above a pillar fall?

Choices:
  1. carbon monoxide
  2. methane
  3. carbon dioxide
  4. hydrogen sulfide


See more about these products


See the BioPak 240R on the web  External Link Icon Download the BioPak 240R Brochure