Respirable Coal Mine Dust Certification Exam 4 Taken from the 2014 MSHA Instruction Guide (IG) 100 Progress Indicator: Question 2 of 20 2.  Health symptoms and warning signs that signal an immediate exit of the hazard area include: Choices: Difficulty with breathing (inhalation / exhalation) Smoke and gases in the facepiece Feelings of nausea, dizziness, or illness All of the above None of the above