Respirable Coal Mine Dust Certification Exam 1
Taken from the 2014 MSHA Instruction Guide (IG) 100
Progress Indicator:
Question 1 of 20
1.
Turning the CMDPSU sampling head assembly upside down _________.
Choices:
has no effect on the sample
makes the pump run harder
is a common cause of voided samples
is the recommended means of collecting samples
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