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Respirable Coal Mine Dust Certification Exam 5
Taken from the 2014 MSHA Instruction Guide (IG) 100


Progress Indicator:
Question 1 of 20

1.  The regulations require _________ valid dust sample(s) from the designated occupation in each mechanized mining unit during each bimonthly period.

Choices:
  1. 1
  2. 3
  3. 5
  4. 10