Nutrition & dietetics · free timed practice test · CDR (Commission on Dietetic Registration)
Free RD Exam Practice Test
This free RD / RDN readiness check maps to CDR’s four Registration Examination domains — Principles (21%), Nutrition Care (45%), Management (21%), and Foodservice Systems (13%). Official exam is computer-adaptive 125–145 items in 3 hours with scaled pass 25/50; this 60-question timed diagnostic is a shorter baseline so dietetic candidates repair weak domains with Anki before Pearson VUE — not CDR material.
Official-source aligned. Topic weights, timing, and pass rules follow published Commission on Dietetic Registration (CDR) outlines. Questions are original UniPrep2Go study aids — not leaked official items. Verify on the official site ↗
Loading timed practice test…
- Questions
- 120
- Time
- 120 min
- Pass target
- 70%
- Domains
- 4
- Exam body
- CDR (Commission on Dietetic Registration)
- Status
- Live · free
Nutrition & dietetics · CDR (Commission on Dietetic Registration)
RD Exam Practice Test
120 Q · 120 min · 70% target
Sample RD Exam practice questions
These sample items mirror the domains in the timed RD Exam mock. Correct answers and explanations unlock inside the practice session.
Sample 1
Which pathogen is commonly associated with undercooked ground beef and severe illness including HUS risk?
- A. Norovirus only from beef fat
- B. Shiga toxin–producing E. coli (e.g., O157:H7)
- C. Clostridium botulinum from fresh lettuce always
- D. Rhinovirus
Sample 2
In acute pancreatitis when oral intake is not tolerated initially, nutrition support may begin with:
- A. NPO status with transition to enteral feeding when clinically appropriate
- B. Immediate high-fat oral boluses
- C. Routine parenteral nutrition for every mild case on day one
- D. Alcohol clearance drinks to stimulate appetite
Sample 3
Which federal law addresses unpaid leave for qualifying family/medical reasons (eligible employees)?
- A. HACCP
- B. DRI
- C. FMLA
- D. IDDSI
Sample 4
The Estimated Average Requirement (EAR) for a nutrient is defined as the intake that meets the needs of:
- A. 50% of healthy individuals in a specific life-stage and gender group
- B. 97–98% of healthy individuals (that is the RDA)
- C. Only the lowest 2% of the population
- D. Every person regardless of health status
Sample 5
Between meals, which organ primarily releases glucose from glycogen to maintain blood sugar?
- A. Skeletal muscle exclusively for systemic glucose
- B. Liver
- C. Skin
- D. Red blood cells
What is the RD Exam exam?
The Registration Examination for Dietitians from the Commission on Dietetic Registration (CDR) is the national exam required to become a Registered Dietitian Nutritionist (RDN) after completing an ACEND-accredited education pathway and supervised practice. The computer-adaptive exam delivers 125–145 items (including 25 unscored pretest questions) in 3 hours and uses a scaled score of 1–50 with a passing point of 25. Current 2022–2026 domain weights are Principles of Dietetics 21%, Nutrition Care for Individuals and Groups 45%, Management of Food and Nutrition Programs and Services 21%, and Foodservice Systems 13%. UniPrep2Go’s free timed check is an independent diagnostic — not a CDR or Pearson VUE exam.
Administered by: Commission on Dietetic Registration (CDR) (official site ↗)
Official format: Computer-adaptive multiple-choice, 125–145 total items (100–120 scored + 25 pretest), 3 hours; scaled pass score 25/50 — verify the current RD Handbook at cdrnet.org.
Official resources: CDR — RD Handbook for Candidates · CDR — RD exam test specifications (2022–2026) · CDR — Study resources
Who this exam is for
Dietetic interns and candidates who have finished (or are finishing) ACEND-accredited education and supervised practice and need a timed domain diagnostic before scheduling the official CDR exam.
How to prepare
Drill all four CDR domains — do not skip foodservice or management. Take this free 120-question UniPrep2Go readiness check for a topic report, then repair weak areas with the linked RD Anki deck while you keep official handbook timing practice separate.
Confirm current fees, eligibility, and scheduling with Commission on Dietetic Registration (CDR) before you book the real exam.
Topic outline
Core domains candidates usually study for RD Exam: Principles of dietetics, Nutrition care for individuals and groups, Management of food and nutrition programs, Foodservice systems.
Principles of dietetics
Food/nutrition sciences, education/communication, and research applications (~21%).
Nutrition care for individuals and groups
Screening, PES diagnosis, intervention, and monitoring/evaluation for individuals and groups (~45%).
Management of food and nutrition programs
Management functions, HR, finance, marketing, and quality/regulatory themes (~21%).
Foodservice systems
Menus, procurement/production, sanitation/safety, and facility planning (~13%).
About this free RD Exam Practice Test
Free 120-question Registered Dietitian (RDN) exam readiness check across CDR’s four domains — principles, nutrition care, management, and foodservice. Use this free timed practice test as a baseline before exam day or before drilling the linked Anki deck.
Built for: Dietetic interns and candidates who have finished (or are finishing) ACEND-accredited education and supervised practice and need a timed domain diagnostic before scheduling the official CDR exam.
Topics on this practice test: Principles of dietetics, Nutrition care for individuals and groups, Management of food and nutrition programs, Foodservice systems.
- 120 timed multiple-choice questions
- 120-minute pacing target
- 70% pass threshold with topic breakdown
- Full answer review after you submit
Free timed mock with full topic report — no signup. After your score, buy the linked Anki deck on Gumroad to drill weak topics with spaced repetition.
Buy RD Exam Anki deck to drill weak topicsOfficial Registration Examination for Dietitians (RD / RDN exam) facts
Structure and domain weights candidates verify against the certifying body before exam day.
The Registration Examination for Dietitians from the Commission on Dietetic Registration (CDR) is the national exam step to become a Registered Dietitian Nutritionist (RDN) after ACEND-accredited education and supervised practice. UniPrep2Go products are independent prep — not CDR exam material.
- Questions
- Computer-adaptive, 125–145 total items (100–120 scored + 25 unscored pretest)
- Time
- 3 hours
- Passing score
- Scaled score of 25 or greater (verify current handbook at cdrnet.org)
- Scoring
- Scaled score 1–50
- Delivery
- Pearson VUE testing centers / CDR-authorized delivery (verify current options in the RD Handbook)
- Administered by
- Commission on Dietetic Registration (CDR)
Knowledge domains and weights
| Domain | Weight |
|---|---|
| Principles of Dietetics | 21% |
| Nutrition Care for Individuals and Groups | 45% |
| Management of Food and Nutrition Programs and Services | 21% |
| Foodservice Systems | 13% |
High-yield facts (commonly tested)
- The RD exam is computer-adaptive and variable length: minimum 125 items (100 scored + 25 pretest), maximum 145 (120 scored + 25 pretest).
- Passing requires a scaled score of 25 or higher on a 1–50 scale — the number of raw correct answers needed varies by form.
- Current outline (2022–2026): Principles 21%, Nutrition Care 45%, Management 21%, Foodservice 13%.
- Eligibility requires ACEND-accredited education pathway and supervised practice before CDR authorizes the exam.
- Nutrition Care Process (ADIME) and PES statements are core clinical judgment themes.
- Foodservice and management domains still appear on every exam — do not skip sanitation, procurement, or HR/finance basics.
Verify current exam fees, scheduling, and administrative details at www.cdrnet.org/rd-handbook. Independent study aid — not official exam material.
RD Exam Practice Test — quick answers
What is the RD / RDN exam?
It is CDR’s Registration Examination for Dietitians — the final exam step to earn the RDN credential in the United States after ACEND education and supervised practice.
How many questions are on the official RD exam?
Computer-adaptive: 125–145 total questions including 25 unscored pretest items. You must answer at least 125 items for a scored report.
Is this UniPrep2Go check the official CDR exam?
No. It is an independent 120-question readiness diagnostic mapped to CDR domain themes — not CDR or Pearson VUE material.
Is there a free RD Exam Practice Test?
Yes — UniPrep2Go hosts a free online RD Exam Practice Test with 120 timed questions, 120 minutes, a 70% pass target, topic scoring, and a full answer review report. Free timed practice test.
How many questions are on this free RD Exam Practice Test?
This UniPrep2Go practice test has 120 multiple-choice questions timed against a 120-minute target. CDR Registration Examination for Dietitians (2022–2026 outline): computer-adaptive, 125–145 items (100–120 scored + 25 pretest), 3 hours, scaled pass 25/50. Domains — Principles 21%, Nutrition Care 45%, Management 21%, Foodservice 13%. This UniPrep2Go check is a 120-question / 120-minute diagnostic, not a CDR exam.
What score do you need on this RD Exam Practice Test?
The pass target on this practice test is 70%. Your report also breaks down performance by topic so you can see weak areas before the real exam.
More FAQAdditional format, scoring, and disclaimer questions
- Who should take this RD Exam Practice Test?
- Dietetic interns and candidates who have finished (or are finishing) ACEND-accredited education and supervised practice and need a timed domain diagnostic before scheduling the official CDR exam.
- Where can I take a RD Exam Practice Test online?
- UniPrep2Go hosts the Free RD Exam Practice Test at https://uniprep2go.study/mock-exams/rd-exam-readiness-check with a timed runner and full readiness report.
- Is this official exam material?
- No. This is an independent readiness diagnostic from UniPrep2Go. It is not official exam-board material and does not award certification or guarantee a passing score.
- What does the report show after the mock?
- Your report shows a pass/no-pass verdict with explanation, topic diagnosis, pacing notes, full question review with explanations, and a repair plan that links to the paid Anki deck on Gumroad for weak-topic drilling.
- Where do the questions come from?
- Original UniPrep2Go local bank (Wave 2) — thickened explanations August 2026.