We have added the references that we used to derive our questions from. This is so you can look up the question and further investigate why an answer may be correct or incorrect. IE5 is IFSTA Essentials of Firefighting 5th Edition. JB2 is Jones & Bartlett Fundamentals of Fire Fighter Skills 2nd Edition, IHM3 is IFSTA Hazardous Materials for First Responders 3rd Edition, and JBHM is Jones & Bartlett Hazardous Materials Awareness and Operations.