I just took the CCU prophecy exam and I have never worked in a CCU before. My specialty is MSICU, but my first travel assignment will be in a CCU. The exam was tough! I studied before I took it and then I had to retake the exam to make above the required 80% passing score (recommedned passing score is 71% by prophecy but my travel company requires a 80%). I also had to take 5 other ones that included pharm and ekg. I had to repeat the pharm one also, but it was no where near as tough as the CCU exam. They allow 2 re-take's if you do not pass the first time.