Emergency Medical Care No. 3 Questions taken from Jones & Bartlett Fundamentals of Fire Fighter Skills (3rd Edition) Progress Indicator: Question 3 of 20 3.  Regarding the proper donning of the facemask, which of the following is TRUE: Choices: Tighten the facepiece as tight as you can Adjust the facemask top strap so that the mask is at the correct level with the face and the head-harness pad is in the center of the back of the head Emphysema is a potential disqualifying factor for wearing a BioPak 240 R