PA Mining Law - Sections 251-260 (1)
Practice test questions for the PA Mine Officials' Exam


Progress Indicator:
Question 2 of 16

2.  The quantity of return air was 14,500 CFM and found to contain 3.4% CH4.  What is the total volume needed to reduce the methane content to 2.0%?

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Choices:
  1. 52,560 CFM
  2. 42,650 CFM
  3. 38,560 CFM
  4. 24,650 CFM


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