Page 1 of 182
Certified Hemodialysis Bio-Medical Technician
(CHBT) Practice Exam Questions & Answers
VERIFIED SOLUTIONS LATEST UPDATE THIS
YEAR
Certified Hemodialysis Bio-Medical Technician (CHBT) Practice Exam
The CHBT certification is administered by the Board of Nephrology Examiners Nursing
Technology (BONENT) . The exam consists of 150 multiple-choice questions with a 3-hour time
limit . The exam covers eight domains, with Water Treatment System Management (30%)
and Medical Machine Maintenance (24%) being the most heavily weighted .
Exam Domains & Weighting
Domain Weight
Water Treatment System Management 30%
Medical Machine Maintenance 24%
Concentrate System Management 11%
Life-Safety and Physical Plant Maintenance 9%
Professional Responsibilities 8%
Documentation Practices 7%
Quality Assurance Performance Improvement 7%
Reprocessing of Dialyzer 4%
Practice Examination
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Domain 1: Medical Machine Maintenance (24% of Exam)
Question 1: Which component of a hemodialysis machine directly controls the ultrafiltration
rate?
A) Blood pump
B) Dialysate pump
C) Conductivity sensor
D) Ultrafiltration pump
Correct Answer: D
The ultrafiltration pump controls fluid removal by creating the necessary pressure gradient
across the dialyzer membrane .
Question 2: A dialysis machine displays a "low venous pressure" alarm. What is the most likely
cause?
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A) Kinked venous tubing
B) Disconnection of the bloodline downstream of the venous pressure monitor
C) Clotting in the venous chamber
D) High blood flow rate
Correct Answer: B
A low venous pressure alarm most often indicates disconnection of the bloodline or a leak in the
venous return line. This is a critical safety alarm as it could result in significant blood loss .
Question 3: What is the primary function of a hemodialysis machine?
A) Remove excess oxygen from blood
B) Filter waste products and excess fluid from blood
C) Regulate blood pressure
D) Increase red blood cell production
Correct Answer: B
, Page 4 of 182
Hemodialysis machines remove metabolic wastes and excess fluids when kidneys fail .
Question 4: Which component of the dialysis system is responsible for diffusion?
A) Blood pump
B) Dialyzer
C) Heparin pump
D) Venous chamber
Correct Answer: B
The dialyzer allows diffusion of toxins across a semi-permeable membrane .
Question 5: A hemodialysis machine alarm indicates "low blood flow." What immediate action
should the technician take?
Certified Hemodialysis Bio-Medical Technician
(CHBT) Practice Exam Questions & Answers
VERIFIED SOLUTIONS LATEST UPDATE THIS
YEAR
Certified Hemodialysis Bio-Medical Technician (CHBT) Practice Exam
The CHBT certification is administered by the Board of Nephrology Examiners Nursing
Technology (BONENT) . The exam consists of 150 multiple-choice questions with a 3-hour time
limit . The exam covers eight domains, with Water Treatment System Management (30%)
and Medical Machine Maintenance (24%) being the most heavily weighted .
Exam Domains & Weighting
Domain Weight
Water Treatment System Management 30%
Medical Machine Maintenance 24%
Concentrate System Management 11%
Life-Safety and Physical Plant Maintenance 9%
Professional Responsibilities 8%
Documentation Practices 7%
Quality Assurance Performance Improvement 7%
Reprocessing of Dialyzer 4%
Practice Examination
,Page 2 of 182
Domain 1: Medical Machine Maintenance (24% of Exam)
Question 1: Which component of a hemodialysis machine directly controls the ultrafiltration
rate?
A) Blood pump
B) Dialysate pump
C) Conductivity sensor
D) Ultrafiltration pump
Correct Answer: D
The ultrafiltration pump controls fluid removal by creating the necessary pressure gradient
across the dialyzer membrane .
Question 2: A dialysis machine displays a "low venous pressure" alarm. What is the most likely
cause?
,Page 3 of 182
A) Kinked venous tubing
B) Disconnection of the bloodline downstream of the venous pressure monitor
C) Clotting in the venous chamber
D) High blood flow rate
Correct Answer: B
A low venous pressure alarm most often indicates disconnection of the bloodline or a leak in the
venous return line. This is a critical safety alarm as it could result in significant blood loss .
Question 3: What is the primary function of a hemodialysis machine?
A) Remove excess oxygen from blood
B) Filter waste products and excess fluid from blood
C) Regulate blood pressure
D) Increase red blood cell production
Correct Answer: B
, Page 4 of 182
Hemodialysis machines remove metabolic wastes and excess fluids when kidneys fail .
Question 4: Which component of the dialysis system is responsible for diffusion?
A) Blood pump
B) Dialyzer
C) Heparin pump
D) Venous chamber
Correct Answer: B
The dialyzer allows diffusion of toxins across a semi-permeable membrane .
Question 5: A hemodialysis machine alarm indicates "low blood flow." What immediate action
should the technician take?
