CSR Practice Test

The CSR exam is for candidates seeking Board Certified Specialist in Renal Nutrition certification through the Commission on Dietetic Registration (CDR). This page brings together free renal nutrition practice sets, worked explanations, and verified exam logistics to help you organize your preparation. Practice Test Geeks uses AI tools to write its content. These are our practice questions, not real exam questions.

CSR Exam at a Glance

What changed for CSR in 2026

• Oct 25, 2026: Registration deadline changed to Schedule within your 1-year eligibility period (previously Book within your 1-year eligibility period).^[1]
• Oct 25, 2026: Renewal changed to Recertify every 5 years: eligibility application with required specialty hours, exam fee and passing the exam (previously Re-apply, pay exam fee and pass the exam every 5 years).^[1]
• Oct 25, 2026: Retake policy changed to Retest 60 days after a failed attempt; reauthorization required (previously Retest after 60 days; reauthorization required).^[1]
• Oct 25, 2026: Score release changed to Printed score report right after the exam (previously Immediately at the test center).^[1]

What the CSR is and how it works

According to Commission on Dietetic Registration (CDR), the credentialing agency of the Academy of Nutrition and Dietetics, “The examination consists of 150 multiple-choice questions (125 questions scored questions and 25 pretest”^[1]

The CSR examination is the exam for CDR's Board Certified Specialist in Renal Nutrition credential. CDR is the credentialing agency of the Academy of Nutrition and Dietetics. The exam is available year-round and is delivered by computer at Pearson VUE test centers. The examination fee is $350.

You will answer 150 multiple-choice questions: 125 scored questions and 25 pretest questions. Passing is criterion-referenced using the Angoff method, with equating across exam forms. The passing score may vary slightly by form to account for differences in difficulty. These verified facts do not establish a fixed practice-test percentage that predicts a passing result. You receive a printed score report right after the exam.

Schedule within your 1-year eligibility period. If you fail, you may retest after 60 days, and reauthorization is required. For eligibility requirements and application instructions, consult CDR's Combined Specialist Handbook; the verified information here does not provide the full initial eligibility criteria.

Certification is valid for 5 years. Recertification requires an eligibility application with the required specialty hours, the exam fee, and passing the exam. Consult CDR's Combined Specialist Handbook and its CSR examination dates and fee schedule page for official administrative requirements.

Worked examples: how to reason through CSR questions

These are practice questions written for this site, not questions from the real exam. Each explanation shows why the right answer is right and why the others are wrong.

Example 1

Question: In dialysis patients, 'dry weight' is best defined as:

1. Body weight after a 24-hour fast
2. The estimated post-dialysis weight representing euvolemia without excess fluid
3. Weight measured in the morning before eating
4. Post-exercise weight after fluid losses

Answer: B. The estimated post-dialysis weight representing euvolemia without excess fluid

Explanation:

B is correct. Dry weight is the estimated post-dialysis weight at which the patient is euvolemic, meaning fluid balance is appropriate without excess fluid. The definition depends on fluid status, rather than simply when the patient steps on a scale. A is wrong because fasting does not establish euvolemia. C describes a measurement routine, but a morning weight can still include excess fluid. D describes weight after exercise-related fluid losses, which does not establish an appropriate dialysis target. Remember the link between dry weight and fluid balance: the lowest measured weight is not automatically the appropriate target.

Example 2

Question: Which amino acid is classified as 'conditionally essential' and particularly important to supplement in dialysis patients due to its accelerated utilization and depletion?

1. Glutamine
2. Carnitine
3. Glycine
4. Serine

Answer: A. Glutamine

Explanation:

A is the intended answer, but this item needs revision. The supplied explanation identifies glutamine as conditionally essential when demand exceeds endogenous production. That classification does not establish the question's broader claim that dialysis patients particularly need glutamine supplementation. B, carnitine, does not fit the amino acid classification being tested. C, glycine, and D, serine, do not match the supplied explanation's intended glutamine mechanism, but the wording provides an inadequate basis for treating every alternative as categorically wrong. Remember to distinguish a nutrient's classification from an indication to supplement it. Use this item to examine that distinction; do not memorize its supplementation claim as a treatment rule.

Example 3

Question: Which pathophysiological mechanism primarily explains the metabolic acidosis commonly seen in advanced CKD (GFR < 30 mL/min)?

1. Increased bicarbonate secretion in the proximal tubule
2. Reduced ammoniagenesis and net acid excretion by the failing kidney
3. Excessive lactic acid production from uremic toxins
4. Hyperventilation causing CO2 retention

Answer: B. Reduced ammoniagenesis and net acid excretion by the failing kidney

Explanation:

B is correct. Advanced CKD reduces the kidney's capacity for ammoniagenesis and net acid excretion. Retained acid contributes to metabolic acidosis as functioning kidney tissue declines. A is wrong because increased proximal bicarbonate secretion is not the primary mechanism described here; the central problem is impaired acid handling. C proposes excess lactic acid production, which does not explain the usual renal mechanism in this question. D is wrong because hyperventilation lowers carbon dioxide rather than retaining it and can compensate for metabolic acidosis. Remember to separate the underlying renal failure to excrete acid from the respiratory response to that acid retention.

How to use these practice tests

Start with CDR's official content outline and Combined Specialist Handbook. Use the outline to identify expected knowledge and the handbook to check application and exam arrangements. The topic links here organize our practice material; they are not a verified official blueprint.

Begin with Renal Physiology & Pathophysiology and Nutrition Assessment & Intervention. Answer before reading the explanation. For each missed question, record the clinical clue you overlooked and explain why the alternatives fail.

Choose your next set from those errors. Confusion about fluid status calls for Fluid Management and Edema Control; difficulty connecting findings to decisions calls for Case Analysis & Practical Application. Compare questionable clinical claims with the relevant guideline before adding them to your notes.

Return to missed topics and explain your reasoning without looking at the answer. Use practice results to locate gaps. Before test day, confirm your Pearson VUE arrangements and that your appointment falls within your 1-year eligibility period.

Sources & last verified

1. Commission on Dietetic Registration (CDR), the credentialing agency of the Academy of Nutrition and Dietetics — number of questions, passing score, retake policy, validity (official source). “The examination consists of 150 multiple-choice questions (125 questions scored questions and 25 pretest” Verified Oct 25, 2026.
2. Commission on Dietetic Registration (CDR), the credentialing agency of the Academy of Nutrition and Dietetics — exam fee, testing window (official source). “Examination Fee: $350” Verified Oct 25, 2026 · source checked Oct 23, 2026.

How we verify: editorial & fact-checking policy. Report an error: contact us.