The Certified Clinical Hemodialysis Technician exam is administered by the NNCO — the National Nephrology Certification Organization — and it is the credential that validates a technician's readiness to provide safe, skilled dialysis care to patients with end-stage renal disease. The exam covers patient safety, machine operation, clinical concepts, complication management, and water treatment standards. Earning CCHT certification demonstrates competence to employers, patients, and state licensing boards alike. Practice with the free CCHT - Certified Clinical Hemodialysis Technician practice test on PracticeTestGeeks (300+ questions with answer explanations).
This page provides a free downloadable PDF so you can take a practice ccht test on paper before sitting the real exam. Printed practice questions let you study away from a screen, mark up the page, and work at your own pace. Many candidates find that handwriting notes beside missed questions helps the material stick better than reviewing answer explanations on a monitor.
The CCHT exam contains 150 multiple-choice questions. Content is drawn from five major domains: Patient Care and Safety, Hemodialysis Technology, Clinical Concepts, Complications Management, and Water Treatment. Each domain requires a different kind of knowledge — from hands-on procedural steps for cannulation to memorized lab value thresholds to protocol-driven emergency responses. A printed PDF practice set lets you identify which domains are strongest and which need more targeted review before your scheduled exam date.
Dialysis technicians work in acute care hospitals, outpatient dialysis centers, and home dialysis support programs. The patients they serve are medically complex, often managing diabetes, hypertension, cardiovascular disease, and anemia simultaneously. The CCHT exam reflects that complexity: it does not just test whether you can run a machine — it tests whether you understand why every step of the procedure matters for patient outcomes.
Facts verified Oct 25, 2026 against Nephrology Nursing Certification Commission. Dates that have passed are removed automatically.
| Item | Detail | Official source |
|---|---|---|
| Number of questions | 150 questions | Nephrology Nursing Certification Commission |
| Time limit | 3 hours | Nephrology Nursing Certification Commission |
| Exam fee | $225 standard processing | Nephrology Nursing Certification Commission |
| Exam fee (Fast Track) | $75 expedited processing | Nephrology Nursing Certification Commission |
| Renewal | 3-year cycle: 3,000 work hours + 30 CE hours (10 nephrology) | Nephrology Nursing Certification Commission |
| Delivery | Computer-based testing with PSI | Nephrology Nursing Certification Commission |
| Eligibility | HS diploma/GED + hemodialysis technician training program | Nephrology Nursing Certification Commission |
| Score release | Immediately on completion | Nephrology Nursing Certification Commission |
| Testing window | 90 days from permit issue | Nephrology Nursing Certification Commission |
Facts verified Oct 25, 2026 against Nephrology Nursing Certification Commission. Dates that have passed are removed automatically.
Interactive CCHT - Certified Clinical Hemodialysis Technician resources on PracticeTestGeeks, free to start:
Patient Care and Safety is the foundation of the entire exam. Technicians must understand infection control protocols specific to dialysis environments, including the OSHA Bloodborne Pathogens Standard and its requirements for PPE, sharps disposal, and exposure incident response. Hand hygiene — soap and water versus alcohol-based sanitizer, and when each is appropriate — is tested directly. Patient identification procedures, fall prevention strategies for dialysis patients who may be orthostatic after treatment, and isolation precautions for patients with transmissible infections all appear regularly in this domain.
Hemodialysis Technology covers the mechanical and procedural knowledge that technicians apply every shift. You must know how to assemble and prime a dialysis machine — setting up both the blood circuit and the dialysate circuit, verifying line connections, priming the dialyzer, and confirming ultrafiltration rate settings before the patient is connected. Cannulation techniques for AV fistulas and grafts are tested in detail: the buttonhole technique involves inserting needles through established scar tissue tracts using dull needles, while the rope-ladder technique rotates insertion sites along the entire length of the access. Central venous catheter access procedures — including the proper locking solution, clamp sequence, and sterile technique — are also covered extensively.
Clinical Concepts require a solid understanding of kidney physiology. The kidneys regulate fluid volume, electrolyte concentrations, acid-base balance, red blood cell production via erythropoietin, and blood pressure via the renin-angiotensin system. When the kidneys fail, all of these functions deteriorate. Technicians need to understand what uremia looks like clinically — fatigue, nausea, itching, mental fogginess — and how dialysis corrects these problems. Dialysis adequacy is measured by Kt/V (a ratio of urea clearance to body water volume) and URR (urea reduction ratio, the percentage drop in BUN across a single treatment). Target Kt/V is typically ≥1.2 per treatment, and target URR is ≥65%. Lab values commonly tested include BUN, creatinine, serum potassium (dangerous if high), serum phosphorus, and hemoglobin.
Complications Management is the domain that most directly affects patient safety during treatments. Intradialytic hypotension — a sudden drop in blood pressure during dialysis — is the most common complication, caused by rapid fluid removal, vasodilation, or underlying cardiac disease. The correct responses include reducing or pausing ultrafiltration, positioning the patient in Trendelenburg (legs elevated), administering a normal saline bolus, and slowing the blood pump if needed. Muscle cramps respond to hypertonic saline or glucose boluses and a reduction in ultrafiltration rate. Air embolism is rare but life-threatening: the technician must stop the blood pump, clamp the venous line, position the patient in left lateral decubitus Trendelenburg, and call for emergency assistance immediately. Hemolysis — the destruction of red blood cells in the circuit — presents with port wine-colored blood, patient chest pain, and back pain, and requires immediate circuit clampdown.
The water treatment domain tests knowledge of reverse osmosis systems and the standards that govern dialysis water quality. Dialysis patients are exposed to over 120 liters of water per week directly through the dialysate circuit — far more than through drinking. Contaminants that would be harmless in drinking water can be lethal at dialysis concentrations. AAMI (Association for the Advancement of Medical Instrumentation) standards define maximum allowable levels for bacteria, endotoxins, and chemical contaminants in dialysis water. Chloramine testing is required at the start of every treatment day because chloramines — formed by the reaction of chlorine and ammonia in municipal water — break down dialysis membranes and cause hemolytic anemia in patients. A failed chloramine test means no treatments until the water system is serviced and re-tested.
Print the PDF and work through it section by section without referencing notes. Give yourself 90 minutes for the full set to simulate real exam pacing — 150 questions in roughly 3 hours means about one minute per question, but building comfort with a shorter window sharpens your speed. After finishing, compare your answers against the key and tally your score by domain. A score below 70% in any single domain signals a gap that needs targeted review before your exam date. Focus your follow-up study on that domain's core concepts, then retake the corresponding section of the PDF a week later to confirm improvement.
The CCHT certification opens doors to better pay, greater professional recognition, and advancement into senior technician and charge technician roles. Preparation takes time, but it does not have to be complicated. Download the practice test PDF above, print it, and start working through questions today. Use your wrong answers as a map — each mistake tells you exactly where to focus your next study session. Return to this page whenever you want a fresh round of printed practice questions to work through before your exam.
Try these questions from our free CCHT - Certified Clinical Hemodialysis Technician practice tests. The correct answer and an explanation follow each question.
What action is required when a hemodialysis machine fails its required disinfection process verification test?
Answer: B. Take the machine out of service immediately, notify biomedical engineering, and document the failure
A failed disinfection verification means the machine may harbor live pathogens; it must be immediately removed from service until repaired and re-verified.
In dialyzer reprocessing, what does the fiber bundle volume (FBV) test assess and what is the minimum acceptable result?
Answer: B. The volume of the hollow fiber compartment, with a minimum of 80% of original volume required for reuse
FBV measures remaining functional membrane surface area; dialyzers must retain 80% or more of original priming volume to ensure adequate solute clearance.
A hematocrit test indicates which of the following?
Answer: C. Concentration of red blood cells in the blood
A hematocrit test measures the percentage of red blood cells (RBCs) in a given volume of whole blood. It is a crucial indicator for diagnosing and monitoring anemia, a common complication in patients with kidney disease. A low hematocrit value signifies anemia, which can impact a patient's energy levels and overall health, and often requires intervention.
The technician finds that the total chlorine level in the water is 1.1 parts per million (ppm) and the free chlorine level is 0.9 ppm while testing for the presence of chloramine. As a result, the amount of chloramine is ____________.
Answer: B. 0.2 ppm.
Chloramine can be combined with ammonia to create a long-acting form of chlorine; it cannot be measured directly, but the chloramine level can be calculated by deducting the free chlorine from the total chlorine: If, when testing water for the level of chloramine, the technician finds that the total chlorine level is 1.1 parts per million (ppm) and the free chlorine level is 0.9 ppm, the chloramine level is 0.2 ppm. 1.1 - 0.9 is equal to 0.2 ppm, or 0.2 mg/L. The dialysis chloramine limit is 0.1 mg/L.
Take the full CCHT - Certified Clinical Hemodialysis Technician practice test