CHBT Practice Test

Key Takeaways

• The CHBT test is a certification exam for individuals seeking a career in dialysis technology.
• The exam assesses your knowledge and skills in the maintenance, repair, and operation of hemodialysis equipment.
• Passing the CHBT certification ensures you are qualified to work in the field of nephrology and renal care.
• The CHBT certification is a valuable asset for those interested in becoming a Hemodialysis Technician.
• Successful completion of the CHBT test demonstrates your commitment to providing high-quality care for patients with kidney-related conditions.

CHBT Exam at a Glance

What changed for CHBT in 2026

• Oct 27, 2026: Retake policy changed to Up to 3 attempts within 12 months, then 8 hours of nephrology CE (previously Up to 3 attempts within 12 months; then 8 hours of nephrology CE required).^[4]
• Oct 27, 2026: Testing window changed to CBT: schedule yourself; take it within 6 months of the confirmation letter (previously CBT: year-round, take within 6 months of confirmation letter).^[8]
• Oct 27, 2026: Renewal changed to 40 contact hours (30+ Group A), retake the exam, or one-time waiver (previously 40 contact hours (30+ Group A), retake the exam, or one-time waiver; plus $65 annual fee).^[5]
• Oct 27, 2026: Passing score changed to Scaled score of 70 (previously Scaled score of 70 (scale 1-100)).^[3]
• Oct 27, 2026: Score release changed to About 3-4 weeks after the exam, by USPS mail (previously Immediately for CBT; 3-4 weeks by mail for paper).^[3]

Free CHBT - Certified Hemodialysis Bio-Medical Technician Study Tools

Interactive CHBT - Certified Hemodialysis Bio-Medical Technician resources on PracticeTestGeeks, free to start:

• Free CHBT Patient Safety and Quality Assurance Questions and Answers 1 — 7 questions with answer explanations
• CHBT - Certified Hemodialysis Bio-Medical Technician flashcards — review key terms and concepts card by card
• CHBT - Certified Hemodialysis Bio-Medical Technician study guide — topic-by-topic overview of what the exam covers
• CHBT - Certified Hemodialysis Bio-Medical Technician cheat sheet — one-page printable summary for last-minute review

According to Board of Nephrology Examiners Nursing and Technology, Inc., “The examination has a three-hour time limit and consists of 150 multiple-choice questions.”^[1]

CHBT content outline and where to practise each area

The content areas below are copied from the official CHBT content outline published by Board of Nephrology Examiners Nursing and Technology, Inc., with the share of the exam each area carries. The right-hand column shows which of our practice sets covers it.

Worked examples: how to reason through CHBT 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: What is the purpose of the 'water rinse' step during dialyzer reprocessing?

1. To flush out blood, clots, and debris from the fiber bundle before disinfectant is applied
2. To apply the disinfectant solution evenly through the fibers
3. To rehydrate the dry membrane after the pressure test
4. To test water quality before it contacts the dialyzer

Answer: A. To flush out blood, clots, and debris from the fiber bundle before disinfectant is applied

Explanation:

The correct answer is that the rinse flushes blood, clots and debris out of the fiber bundle before disinfectant goes in. Organic material such as blood can neutralise disinfectant, so it has to be removed first.

Applying the disinfectant evenly through the fibers is the job of the disinfectant fill step, not the rinse. Rehydrating the membrane after a pressure test is not what the rinse is for. Testing water quality is a separate check done on the water supply, not by running water through a dialyzer.

Rule to remember: in reprocessing, remove organic load before you disinfect. Cleaning always comes before disinfection, and each step has one distinct purpose.

Example 2

Question: All of the following substances are produced by the kidney EXCEPT:

1. renin.
2. aldosterone.
3. erythropoietin.
4. calcitriol.

Answer: B. aldosterone.

Explanation:

The answer is aldosterone, because it is made by the adrenal glands, not the kidneys. It acts on the kidney to regulate sodium and potassium, which is why it is easy to confuse with a kidney product.

Renin is released by the kidney and helps regulate blood pressure, so it is wrong as an answer to an EXCEPT question. Erythropoietin comes from the kidney and stimulates red blood cell production. Calcitriol is the active form of vitamin D, finished in the kidney.

Rule to remember: the kidney makes renin, erythropoietin and calcitriol, and responds to aldosterone without producing it. With EXCEPT questions, find the three true statements and the odd one out is your answer.

Example 3

Question: Why must a reprocessed dialyzer not be used within a minimum contact time after disinfectant filling?

1. The disinfectant requires a minimum contact time (typically several hours) to achieve sufficient germicidal efficacy against all target organisms
2. The dialyzer membrane needs time to rehydrate after the reprocessing rinse
3. CMS regulations require a minimum 12-hour quarantine for all reprocessed equipment
4. The disinfectant must evaporate partially before the dialyzer is safe to use

Answer: A. The disinfectant requires a minimum contact time (typically several hours) to achieve sufficient germicidal efficacy against all target organisms

Explanation:

The correct answer is that the disinfectant needs a minimum contact time to reach sufficient germicidal effect against the target organisms. Using the dialyzer early risks leaving organisms alive.

Membrane rehydration is not the reason for the wait, since the issue is microbial kill, not the membrane. The claim of a fixed 12-hour quarantine for all reprocessed equipment is not how the requirement works; the contact time depends on the disinfectant and the manufacturer's instructions. Disinfectant does not need to evaporate, and a dialyzer is rinsed of disinfectant before use, not left to dry it off.

Rule to remember: follow the labelled contact time for the product in use, and never shorten it.

How to use these practice tests

Start with the official BONENT CHBT page and the content outline, then rank the areas by how comfortable you are with each. Spend the most time on the areas that carry the most weight in the outline, which are water treatment and machine maintenance.

Work through a practice set for one area at a time, such as Water Treatment Systems for Dialysis or Dialysis Equipment Maintenance and Troubleshooting. Do not just check the score. For every miss, write down the rule behind the right answer in your own words, then look it up in your facility's procedures or the manufacturer's manuals.

• Pair reprocessing questions with Reuse and Disinfection Protocols and learn the order of steps, not just the names.
• Use Regulatory Compliance and Documentation for the recording and compliance material.
• Return to your weakest sets a few days later and redo them without notes.

Our questions are written by us with AI tools and are not real exam questions, so treat them as practice for reasoning, not a preview. Before test day, time yourself on a long mixed run so the 3-hour limit feels familiar.

What is the CHBT Exam?

Understanding the CHBT (Certified Hemodialysis Bio-Medical Technician) Test

The CHBT (Certified Hemodialysis Bio-Medical Technician) is key in dialysis care. They make sure dialysis equipment works right and patients are safe. The CHBT exam checks if a candidate knows how to keep dialysis machines and other equipment running smoothly. Practice with the free CHBT - Certified Hemodialysis Bio-Medical Technician practice test on PracticeTestGeeks (7 questions with answer explanations).

The CHBT exam tests a candidate’s skills and knowledge in several areas:

• Dialysis machine operation: Candidates must know how to set up, run, and fix dialysis machines for safe patient care.
• Dialysis water treatment systems: The exam looks at a candidate’s knowledge of water treatment systems in dialysis. These systems are key for clean dialysis water.
• Biomedical equipment maintenance: Candidates show they can keep dialysis equipment like blood pressure monitors and scales in good shape.
• Patient care and safety: The exam checks if a candidate knows how to keep patients safe during dialysis, including following infection control rules and handling emergencies.

Eligibility Requirements for CHBT Certification

To get CHBT certified, candidates must:

1. Finish a dialysis technician training program or have similar experience in a dialysis setting.
2. Know how to work with dialysis equipment like machines and water treatment systems.
3. Understand patient care and safety during dialysis, including how to prevent infections and handle emergencies.
4. Have a clean criminal record and follow ethical standards in healthcare.

Getting the CHBT certification is great for those wanting to work as dialysis technicians, hemodialysis technicians, or nephrology technicians. It shows they’re dedicated to being the best and can give top-notch dialysis care to patients.

Pros and Cons at a Glance

Sample CHBT - Certified Hemodialysis Bio-Medical Technician Practice Questions

Try these questions from our free CHBT - Certified Hemodialysis Bio-Medical Technician practice tests. The correct answer and an explanation follow each question.

1. The fluid restriction for most patients undergoing in-center hemodialysis is equal to urine volume/day plus:

   • A. 0 L.
   • B. 0.5 L.
   • C. 1 L.
   • D. 2 L.

Answer: C. 1 L.

For most in-center hemodialysis patients, a common fluid restriction guideline is to limit daily fluid intake to their residual urine output plus 1 liter. This additional liter accounts for insensible fluid losses (e.g., through breathing and sweat) and helps prevent excessive fluid accumulation between dialysis sessions.

Answer: A. At no cost to the employee, within 10 working days of initial assignment to a job with occupational exposure

OSHA's Bloodborne Pathogens Standard (29 CFR 1910.1030) mandates that employers provide HBV vaccination free of charge to all employees with occupational blood exposure within 10 days of job assignment.

Answer: A. Use water that meets dialysis water quality standards and mix per manufacturer instructions to ensure sterility and correct concentration

Bicarbonate solutions support bacterial growth rapidly; they must be prepared with purified water, used promptly (within manufacturer-specified timeframes), and mixed per protocol.

Answer: C. Short daily home hemodialysis, 2-3 hours a session, 5-7 days a week

Short daily home hemodialysis is generally considered the most efficient schedule because it mimics natural kidney function more closely by providing more frequent, shorter treatments. This leads to better clearance of toxins, improved fluid management, and often better patient outcomes and quality of life compared to less frequent schedules.

Take the full CHBT - Certified Hemodialysis Bio-Medical Technician practice test

Sources & last verified

1. Board of Nephrology Examiners Nursing and Technology, Inc. — number of questions, time limit, other (official source). “The examination has a three-hour time limit and consists of 150 multiple-choice questions.” Verified Nov 1, 2026 · source checked Oct 22, 2026.
2. Board of Nephrology Examiners Nursing and Technology, Inc. — exam fee, eligibility (official source). “Exam Fees Country USA $235 $255 Locations Outside USA** $260 $255” Verified Oct 27, 2026 · source checked Oct 16, 2026.
3. Board of Nephrology Examiners Nursing and Technology, Inc. — passing score, score release (official source). “The minimum scaled passing score (MSPS) for all BONENT exam types (CHT, CHBT, CHN, CPDN, CHWS) is 70.” Verified Oct 27, 2026.
4. Board of Nephrology Examiners Nursing and Technology, Inc. — retake fee, retake policy (official source). “Fees for Re-examination Exam Method USA INT’L $235 $260 $255 $255” Verified Oct 27, 2026 · source checked Oct 16, 2026.
5. Board of Nephrology Examiners Nursing and Technology, Inc. — validity, renewal (official source). “Recertification is required every four years.” Verified Oct 27, 2026 · source checked Oct 22, 2026.
6. Board of Nephrology Examiners Nursing and Technology, Inc. — delivery (official source). “The PPE schedule below is a completely different list than the Computer-Based Testing (CBT) list” Verified Oct 27, 2026 · source checked Oct 22, 2026.
7. Board of Nephrology Examiners Nursing and Technology, Inc. — registration deadline (official source). “application and examination fees (paid in full with application) must be received 45 days (60 days for international examinations) before the exam date.” Verified Oct 27, 2026 · source checked Oct 16, 2026.
8. Board of Nephrology Examiners Nursing and Technology, Inc. — testing window (official source). “You will have to take the exam within 6 months of receiving your Confirmation Letter.” Verified Oct 27, 2026 · source checked Oct 16, 2026.

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