Preshift Exam No. 2 Taken from the 2016 NMRA Post 6 Preshift Contest held in Moundsville, WV Progress Indicator: Question 3 of 10 3.  Monitoring of a CPDM sample during the sampling shift is to assure __________. Choices: the device is in the proper location the device is operating properly the work environment of the sampled entity remains in compliance with the applicable standard at the end of the shift. all of the above