Part of the RD exam pass
RD exam practice test: 145 questions in 3 hours
145 questions · 3 hours · 120 scored · No going back
For exams through December 31, 2026: the longest RD exam, 145 four-option questions in 3 hours, one at a time. The result scores the 120 scored questions by domain and content area.
Before you start
- Every question has four options and one correct answer. Each explanation says why the answer is right and why the most tempting wrong answer is wrong.
- The real RD exam is computer adaptive: it gives every candidate at least 125 questions and stops anywhere up to 145, choosing questions by your answers. This practice exam is fixed-length and not adaptive: it always gives the maximum 145 (120 scored plus 25 unscored pretest questions mixed in) on the full 3-hour clock.
- The 120 scored questions follow the 2022-2026 outline’s weights: Principles of Dietetics 25, Nutrition Care for Individuals and Groups 54, Management of Food and Nutrition Programs and Services 25, Foodservice Systems 16. CDR publishes percentages, not counts; these counts are ours.
- CDR scores the exam on a 1 to 50 scale with a passing score of 25 and does not publish how many correct answers that takes, so the result shows your percent correct overall and by domain, not a pass line.
- As on the real exam, you answer each question to move on and cannot skip, go back or change an answer. The clock keeps running in background tabs and reloads; when time runs out, your answers are submitted.
Original practice questions written to CDR’s 2022-2026 and 2027-2031 RD test specifications, not CDR exam questions. Independent practice, not affiliated with or endorsed by the Commission on Dietetic Registration (CDR), the Academy of Nutrition and Dietetics or Pearson VUE. RD and RDN are credentials of CDR and marks of the Academy of Nutrition and Dietetics.