Welcome to CertifiedRN.com’s CCRN® Practice Questions with Rationale. Each of the 123 questions are designed to not only answer the question, but also teach you important clinical information around the topic. The questions are divided by body system. This way you can determine which body system you are an expert at and which one you need to study more. Questions follow a similar format to that found on the CCRN® test. It’s only 4 cents a question!