Respirable Coal Mine Dust Certification Exam 6
Taken from the 2014 MSHA Instruction Guide (IG) 100

Progress Indicator:
Question 1 of 20

1.  Each mine operator shall take _________ valid respirable coal mine dust sample(s) from each designated area during each bimonthly period.

  1. 10
  2. 5
  3. 3
  4. 1

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