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RD exam practice test

Here are 20 free practice questions in the style of the CDR registration exam for dietitians, with four options each. They’re original questions that cover all four domains: nutrition science, nutrition care, management and foodservice. The real exam has 125 to 145 questions and uses a scaled score, so we use 70% as a practice target. You’ll see why each answer is right, and the tutor can explain it another way.

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Updated October 2026 · Written from official sources, listed at the bottom of this page

Question 1 of 20

A patient with a long history of heavy alcohol use is admitted with confusion, unsteady gait and abnormal eye movements. Deficiency of which vitamin is the most likely cause?

Sample of the exam: same format, 20 questions.

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Everything else, in one place

OverviewRD exam: the registered dietitian examHow many questionsHow many questions are on the RD exam?ScoringHow the RD exam is scoredOnline examCan you take the RD exam online?Handbook and study guideRD exam handbook and study guideWhere to learnWhere to study for the RD exam
Sources: CDR and 2 more. Checked October 2026.

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