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CDR RDFree Registered Dietitian practice test
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10 real CDR RD practice questions with instant answers and explanations — no account, no credit card, no email. Score yourself, then unlock the full bank of 1,500 questions whenever you’re ready. The CDR RD passing score is Scaled score of 25 (on a 1-50 scale); CAT format ends when proficiency is determined.
A dietitian wants a lab marker that best reflects long-term visceral protein status in a patient without acute inflammation. Which value is most appropriate?
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Q1. A dietitian wants a lab marker that best reflects long-term visceral protein status in a patient without acute inflammation. Which value is most appropriate?
Correct answer: C. Serum albumin
Albumin has a half-life of about 20 days, making it a marker of longer-term protein status, whereas prealbumin's shorter half-life (2-3 days) better reflects acute changes.
Q2. When estimating energy needs for a patient with obesity using an adjusted body weight (ABW), which formula is correct?
Correct answer: A. ABW = IBW + 0.25 x (actual weight - IBW)
Adjusted body weight adds a fraction (commonly 25 percent) of the difference between actual and ideal body weight to the ideal body weight to account for metabolically active excess tissue.
Q3. A severely malnourished patient begins aggressive enteral feeding. Which electrolyte imbalance poses the greatest immediate risk as part of refeeding syndrome?
Correct answer: D. Hypophosphatemia
Reintroducing carbohydrate stimulates insulin release, driving phosphorus (along with potassium and magnesium) intracellularly and causing dangerous hypophosphatemia in refeeding syndrome.
Q4. For a tube-fed patient, at what gastric residual volume should feeding typically be held pending further clinical assessment, per current enteral nutrition practice guidance?
Correct answer: B. 500 mL
Current guidance generally recommends against automatically holding feeds for residuals below 500 mL, reserving a hold-and-reassess approach for volumes at or above that threshold.
Q5. At what age should complementary (solid) foods typically be introduced to a healthy, full-term infant?
Correct answer: A. 6 months
Current infant feeding guidance recommends introducing complementary foods around 6 months of age while continuing breast milk or formula.
Q6. For a non-dialysis patient with stage 3-4 chronic kidney disease, what protein intake range is typically recommended to help slow disease progression?
Correct answer: D. 0.6-0.8 g/kg/day
Moderate protein restriction, roughly 0.6-0.8 g/kg/day, is commonly recommended for non-dialysis CKD stage 3-4 patients to reduce nitrogenous waste and slow progression, provided adequate energy intake is maintained.
Q7. A patient receiving maintenance hemodialysis has increased protein needs due to losses during treatment. What protein intake is generally recommended?
Correct answer: B. 1.2-1.3 g/kg/day
Hemodialysis patients lose amino acids and protein into the dialysate, so protein needs increase to roughly 1.2-1.3 g/kg/day compared with lower-protein diets used before dialysis initiation.
Q8. What is the generally accepted upper osmolarity limit for parenteral nutrition solutions infused through a peripheral vein?
Correct answer: C. 900 mOsm/L
Peripheral veins tolerate solutions only up to about 900 mOsm/L before risking phlebitis; higher-osmolarity parenteral nutrition requires central venous access.
Q9. Before initiating nutrition support in a chronically malnourished patient, which vitamin should be supplemented to help prevent Wernicke encephalopathy?
Correct answer: D. Thiamin
Thiamin is a cofactor in carbohydrate metabolism; malnourished patients are at risk of depleted thiamin stores, and reintroducing carbohydrate without supplementation can precipitate Wernicke encephalopathy.
Q10. During a nutrition-focused physical exam, the clinician notes Bitot's spots on the conjunctiva. This finding is most associated with deficiency of which nutrient?
Correct answer: A. Vitamin A
Bitot's spots are foamy, keratin-containing lesions on the conjunctiva classically associated with vitamin A deficiency and early xerophthalmia.
Exam facts and objectives sourced from the official CDR (Commission on Dietetic Registration) certification page. Last reviewed June 2026.
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