100+ Free CHT Practice Questions

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What is the first step in the water treatment process for hemodialysis?

Water softening.

Carbon filtration.

Reverse osmosis.

Sediment filtration.

to track

2026 Statistics

Key Facts: CHT Exam

150

Multiple-Choice Qs

BONENT

3 hrs

Time Limit

BONENT

70/100

Passing Scaled Score

BONENT

$255

Exam Fee

BONENT 2026

4 yrs

Certification Validity

BONENT

$25

Retake Fee

BONENT

BONENT CHT is one of two nationally recognized hemodialysis technician credentials (alongside NNCC's CCHT). It is accepted in all states with PCT certification requirements and is required by CMS for technicians without state-specific certification.

Sample CHT Practice Questions

Try these sample questions to test your CHT exam readiness. Each question includes a detailed explanation. Start the interactive quiz above for the full 100+ question experience with AI tutoring.

1What is the primary purpose of assessing a patient's weight before and after hemodialysis?

A.To determine their nutritional status.

B.To calculate the amount of fluid to be removed.

C.To adjust their medication dosage.

D.To monitor for signs of infection.

Explanation: Assessing a patient's weight before and after hemodialysis is crucial for determining the amount of excess fluid that needs to be removed during the treatment. This is also known as the ultrafiltration goal.

2Which of the following is a critical step in preparing the hemodialysis machine before initiating treatment?

A.Priming the dialyzer and bloodlines with saline.

B.Calibrating the patient's blood pressure cuff.

C.Ensuring the patient has a comfortable chair.

D.Preparing a post-dialysis snack for the patient.

Explanation: Priming the dialyzer and bloodlines with saline is a critical step in preparing the hemodialysis machine. This process removes any air and sterilants from the system, ensuring patient safety.

3What is the acceptable level of chlorine in the water used for hemodialysis?

A.Less than 0.1 ppm

B.Less than 0.5 ppm

C.Less than 1.0 ppm

D.Less than 5.0 ppm

Explanation: The acceptable level of chlorine in the water used for hemodialysis is less than 0.1 ppm. Higher levels of chlorine can cause hemolysis, a dangerous condition where red blood cells are destroyed.

4Which of the following is the most important practice for preventing the transmission of infection in a hemodialysis unit?

A.Wearing a new gown for each patient.

B.Hand hygiene before and after patient contact.

C.Using a new needle for each cannulation.

D.Disinfecting the patient's chair after each use.

Explanation: Hand hygiene is the single most important practice for preventing the transmission of infection in any healthcare setting, including hemodialysis units. It should be performed before and after any patient contact.

5A patient on hemodialysis develops hypotension. What is the most appropriate initial intervention?

A.Administer a bolus of hypertonic saline.

B.Decrease the ultrafiltration rate.

C.Increase the blood flow rate.

D.Place the patient in an upright position.

Explanation: Hypotension during hemodialysis is often caused by excessive fluid removal. Decreasing the ultrafiltration rate is the most appropriate initial intervention to reduce the rate of fluid removal and allow the patient's blood pressure to stabilize.

6What does the term 'dry weight' refer to in the context of hemodialysis?

A.The patient's weight before starting a dialysis session.

B.The patient's target weight after a dialysis session, representing their normal fluid status.

C.The weight of the dialyzer before use.

D.The total weight of fluid removed during a dialysis session.

Explanation: 'Dry weight' is the patient's ideal post-dialysis weight, where they are free of excess fluid and their blood pressure is normal. It is a target set by the physician.

7What is the function of the dialysate in hemodialysis?

A.To remove waste products from the blood.

B.To add electrolytes and minerals to the blood.

C.To carry waste products away from the dialyzer.

D.All of the above.

Explanation: The dialysate is a solution that helps remove waste products from the blood, can add necessary electrolytes and minerals, and carries the removed waste products away from the dialyzer.

8What is the purpose of the reverse osmosis (RO) system in a hemodialysis water treatment facility?

A.To remove chlorine and chloramines from the water.

B.To remove bacteria and endotoxins from the water.

C.To soften the water by removing calcium and magnesium.

D.To remove dissolved salts and other impurities from the water.

Explanation: The reverse osmosis (RO) system is the primary component of a hemodialysis water treatment facility. It uses a semipermeable membrane to remove dissolved salts, organic compounds, and other impurities from the water, ensuring it is safe for use in dialysis.

9What is the primary purpose of reprocessing a dialyzer?

A.To save money on the cost of new dialyzers.

B.To reduce the amount of medical waste.

C.To clean, disinfect, and test the dialyzer for reuse by the same patient.

D.To sterilize the dialyzer for use by any patient.

Explanation: The primary purpose of reprocessing a dialyzer is to ensure it is clean, disinfected, and functioning properly for reuse by the same patient. This is done to ensure patient safety and the effectiveness of the treatment.

10A patient on hemodialysis complains of muscle cramps. Which of the following is the most likely cause?

A.Hypokalemia

B.Hypercalcemia

C.Rapid fluid and electrolyte shifts

D.An allergic reaction to the dialyzer

Explanation: Muscle cramps during hemodialysis are most commonly caused by rapid fluid and electrolyte shifts, particularly the removal of sodium. This can lead to muscle irritability and cramping.

About the CHT Exam

The Certified Hemodialysis Technologist/Technician (CHT) credential is administered by the Board of Nephrology Examiners Nursing Technology (BONENT). The computer-based exam contains 150 multiple-choice questions covering patient care, machine technology, water treatment, infection control, and the technician's professional role in dialysis settings.

Questions

150 scored questions

Time Limit

3 hours

Passing Score

Scaled 70/100

Exam Fee

$255 (BONENT)

CHT Exam Content Outline

45%

Patient Care

Pre/intra/post-dialysis patient assessment, vital signs, vascular access monitoring, intradialytic complications, dry weight, and patient education.

23%

Water Treatment

AAMI water quality standards, reverse osmosis, deionization, carbon tanks, UV systems, and cultural and endotoxin testing protocols.

12%

Machine Technology

Hemodialysis machine setup, alarm troubleshooting, dialysate composition, conductivity, and disinfection between treatments.

12%

Infection Control

Bloodborne pathogen precautions, hepatitis B/C and HIV protocols, hand hygiene, isolation, and CDC dialysis-specific guidelines.

Dialysis Principles & Professional Role

Renal anatomy and physiology, principles of dialysis (diffusion, ultrafiltration, osmosis), ethics, and scope of practice.

How to Pass the CHT Exam

What You Need to Know

Passing score: Scaled 70/100
Exam length: 150 questions
Time limit: 3 hours
Exam fee: $255

Keys to Passing

Complete 500+ practice questions
Score 80%+ consistently before scheduling
Focus on highest-weighted sections
Use our AI tutor for tough concepts

CHT Study Tips from Top Performers

1Memorize AAMI water quality limits cold — chemical contaminants, bacteria, endotoxins

2Drill alarm troubleshooting: venous pressure, arterial pressure, conductivity, TMP

3Know hepatitis B isolation precautions specific to dialysis units

4Practice math: UFR, BFR, KT/V, URR calculations

5Review intradialytic complications: hypotension, cramps, disequilibrium syndrome

Frequently Asked Questions

What is the BONENT CHT exam?

The CHT is a national certification for hemodialysis technicians administered by BONENT. It is a separate credential from NNCC's CCHT — both are accepted by CMS and most state boards.

How many questions are on the CHT exam?

The BONENT CHT exam contains 150 multiple-choice questions delivered via computer-based testing at PSI test centers.

How long is the CHT exam?

Candidates have 3 hours to complete the 150-question CHT exam in a single seated session.

What is the passing score for the CHT exam?

BONENT uses a scaled scoring system. Candidates must achieve a scaled score of 70 (out of 100) to pass. Raw cut scores vary slightly by exam form.

How much does the CHT exam cost?

The BONENT CHT examination fee is $255 for the computer-based version. A $25 retake fee applies if you do not pass on the first attempt.