Dialysis Technician Certification Exam

Dialysis Technician Certification Exam Practice Test Questions And Correct Answers (Verified Answers) Plus Rationales 2026 Q&A | Instant Download Pdf

• What is the primary function of the kidneys?
• Produce digestive enzymes
• Regulate body temperature
• Remove waste and excess fluids from the blood
• Produce red blood cells

Rationale: The kidneys filter waste and excess fluids from the blood,

forming urine to maintain fluid and electrolyte balance.

• Which of the following is a common cause of chronic kidney disease

(CKD)?

• Influenza
• Diabetes mellitus 1 / 4

• Tuberculosis
• Asthma

Rationale: Diabetes damages blood vessels in the kidneys over time,

leading to chronic kidney disease.

• What is the purpose of hemodialysis?
• To increase white blood cell count
• To remove plaque from arteries
• To filter toxins and excess fluid from the blood
• To promote bone density

Rationale: Hemodialysis mimics kidney function by filtering waste

products and excess fluids from the bloodstream.

• What does AV fistula stand for?
• Arterial-venous filter
• Artery-vein fiber
• Arteriovenous fistula
• Arterial veinous flow

Rationale: An arteriovenous fistula is a surgical connection between

an artery and a vein for hemodialysis access.

• Which of the following access types has the lowest risk of infection?
• Tunneled catheter
• Arteriovenous fistula
• Arteriovenous graft
• Temporary catheter 2 / 4

Rationale: AV fistulas are the preferred long-term vascular access

because they have fewer infections and complications.

• What is the normal blood urea nitrogen (BUN) level?
• 1–5 mg/dL
• 5–10 mg/dL
• 7–20 mg/dL
• 25–40 mg/dL

Rationale: Normal BUN levels range between 7–20 mg/dL; higher

levels indicate impaired kidney function.

• What is the main purpose of the dialyzer?
• Pump blood into the veins
• Store dialysate
• Act as an artificial kidney to clean the blood
• Regulate blood pressure

Rationale: The dialyzer is the artificial kidney that filters waste,

toxins, and excess fluid from the blood.

8. The semipermeable membrane in a dialyzer allows:

• All molecules to pass freely
• Only proteins to pass
• Small molecules like urea and electrolytes to pass
• No molecules to pass

Rationale: The membrane allows diffusion of small solutes while

retaining larger molecules like proteins. 3 / 4

• The process by which solutes move from an area of higher to lower

concentration is called:

• Filtration
• Osmosis
• Diffusion
• Convection

Rationale: Diffusion allows solutes to move across a membrane from

high to low concentration areas.

• The process of removing excess fluid by pressure across a

membrane is called:

• Dialysis
• Diffusion
• Ultrafiltration
• Osmosis

Rationale: Ultrafiltration removes water through pressure

differences across the dialyzer membrane.

• Which electrolyte is most affected by dialysis?
• Calcium
• Phosphate
• Potassium
• Iron

Rationale: Dialysis helps remove excess potassium, which can cause

cardiac complications if elevated.

• / 4