The Arizona Boilers, Steamfitting and Process Piping (C-4, CR-4) Exam Prep Complete Package includes the references used for the exam, pre-printed tabs for those references allowed in during the exam and 365 days access to our online exam prep course. The highlighting guides and quizzes are designed to familiarize students with testing materials. We do not provide students with exact test questions, as the state does not release this information.