CPDM Certified Person Sampling Test No. 5 Taken from the CPDM Certified Person Sampling Exam Pool Progress Indicator: Question 1 of 27 1.  The flow rate of a CPDM can be calibrated by following the manufacture’s procedures. The person authorized to perform the procedures must be ________. Choices: certified by MSHA in low voltage power certified by MSHA in maintenance and calibration for the CPDM certified by MSHA as a mine foreman employed by the manufacturer