Many states and employers require a CRT exam, or certified respiratory therapist exam, in order to work for them. This exam will come after all of your other requirements are completed in school. Respiratory therapist careers are vital to the medical field in hospitals especially. Because of this, this exam can be one of the most stressful parts of becoming a respiratory therapist. With that said, much preparation should be considered to ensure a passing grade for employment. Once you do pass, you can be on the road to a very fulfilling career that will last the rest of your working years without worry.