CDR Study Guide 2026
Everything you need to pass the CDR exam in one place: the exam format, every topic to study, real practice questions with explanations, flashcards, and full-length practice tests. Free, no sign-up needed.
CDR exam key facts
- The CDR Registration Examination for Dietitians is variable-length, with 125 to 145 questions: 100 to 120 scored plus 25 unscored pretest questions. Source
- Candidates get 3 hours to complete the CDR Registration Examination for Dietitians, within a 3.5-hour appointment that includes a tutorial and a survey. Source
- Passing the CDR Registration Examination for Dietitians requires a minimum scaled score of 25 on a 1–50 scale. Source
- The CDR Registration Examination for Dietitians costs $250 per attempt, paid by credit card to Pearson VUE when booking. Source
- Candidates who fail the CDR Registration Examination for Dietitians must reauthorize with CDR and can retest 46 days after the unsuccessful attempt. Source
- Approval to take the CDR Registration Examination for Dietitians lasts one year, and candidates must reauthorize if they do not test or do not pass in that time. Source
📋 CDR Exam Format at a Glance
📚 CDR Topics to Study (19)
✍️ Sample CDR Questions & Answers
1. What is the primary indication for using a nasojejunal (NJ) tube instead of a nasogastric (NG) tube?
NJ tubes bypass the stomach and deliver formula directly into the jejunum, significantly reducing aspiration risk in patients with gastroparesis, gastroesophageal reflux, or impaired gastric motility.
2. What is the purpose of peer review in Commission on Dietetic Registration Exam research methods?
Peer review involves independent evaluation of research by qualified experts in the field, assessing methodology, validity, significance, and contribution to knowledge before publication.
3. In Commission on Dietetic Registration Exam, what is the primary purpose of patient assessment in clinical nutrition?
Patient assessment systematically gathers information about the patient's physical, psychological, and social condition, forming the foundation for clinical decision-making and care planning.
4. Prior to menopause, women are less likely to be effected by heart disease. In the study of disease epidemiology, gender is known as a:
Gender is a fixed determinant of disease epidemiology, as it cannot be changed. Other fixed determinants include race and genetics.
5. What are the benefits of becoming a registered dietitian (RD) or dietetic technician, registered (DTR) through the CDR examination?
Becoming registered through the CDR examination demonstrates expertise and competency in dietetics, enhancing career opportunities and credibility.
6. In Commission on Dietetic Registration Exam, why is professional practice knowledge important for professional certification?
Professional certification in specific knowledge areas demonstrates that practitioners have met established competency standards, ensuring quality of service and public protection.
🎯 Free CDR Practice Tests
📖 CDR Guides & Articles
What Practice Test Geeks adds beyond an AI chat for CDR
An AI chatbot can quiz you, but it can't reproduce the exam conditions or keep your record. Here you get:
- A timed, full-length CDR mock exam — 145 questions in 180 minutes with a 70% pass mark, modeled on the official exam's question count and time limit, followed by a score report broken down by exam domain.
- A fixed CDR question bank: the same test every attempt, so your score is comparable from one try to the next instead of changing with every regenerated quiz.
- Progress saved on your device: completed tests, scores and missed questions stay in My Progress, so you can retake only what you got wrong.
- A printable CDR cheat sheet you can print or save as a PDF.
- CDR flashcards built from the same question bank.
- Free CDR practice tests with the correct answer shown after each question.
How this page was made: written with AI tools and published by Nathan Beja, founder of Practice Test Geeks, who is responsible for its content. Exam facts are checked against the official sources listed below. Not reviewed by a subject-matter expert. Editorial policy
Sources & references
Exam facts on this page (fees, format, dates, passing scores) are checked against these official sources; the date is our last check. Editorial policy
- pearsonvue.com — Score validity · verified Oct 2026
- cdrnet.org — Test delivery, fees, exam format, passing score, retake policy, score release, test dates, time limit, eligibility · verified Oct 2026