Certified Hemodialysis Bio-Medical Technician (CHBT) –
Complete 200-Question Practice Exam with Answers &
Explanations| PDF
Overview:
This exam is designed for CHBT candidates to thoroughly prepare for certification. Covering all
key areas of hemodialysis equipment operation, patient safety, water quality, preventive
maintenance, and troubleshooting, this exam ensures a deep understanding of practical and
theoretical aspects of hemodialysis technology.
Topics Covered:
o Dialysis machine components and operation
o Transmembrane pressure (TMP) and ultrafiltration (UF)
o Water treatment and RO systems
o Dialysate preparation and quality control
o Machine alarms, sensors, and troubleshooting
o Chemical disinfection and safety protocols
o Documentation and regulatory compliance
o Preventive maintenance and calibration
Question 1
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
Answer: B
Hemodialysis machines remove metabolic wastes and excess fluids when kidneys fail.
Question 2
Which component of the dialysis system is responsible for diffusion?
A. Blood pump
B. Dialyzer
C. Heparin pump
D. Venous chamber
,Answer: B
The dialyzer allows diffusion of toxins across a semi-permeable membrane.
Question 3
What type of membrane is used in a dialyzer?
A. Impermeable membrane
B. Semi-permeable membrane
C. Fully permeable membrane
D. Synthetic solid membrane
Answer: B
Semi-permeable membranes allow selective transfer of solutes.
Question 4
Which water treatment component removes chlorine and chloramines?
A. Reverse osmosis (RO)
B. Carbon filter
C. Deionizer
D. Sediment filter
Answer: B
Carbon filters adsorb chlorine and chloramines from water.
Question 5
Excess chlorine in dialysis water can cause:
A. Hypotension
B. Hemolysis
C. Hypoglycemia
D. Air embolism
Answer: B
Chlorine damages red blood cells, leading to hemolysis.
,Question 6
What is the normal blood flow rate during adult hemodialysis?
A. 50–100 mL/min
B. 100–200 mL/min
C. 300–500 mL/min
D. 700–900 mL/min
Answer: C
Adult dialysis typically uses 300–500 mL/min blood flow.
Question 7
Which alarm indicates a possible blood leak?
A. Conductivity alarm
B. Air detector alarm
C. Blood leak detector alarm
D. Venous pressure alarm
Answer: C
Blood leak detectors sense red blood cells in dialysate.
Question 8
What does ultrafiltration remove during dialysis?
A. Electrolytes
B. Toxins only
C. Excess fluid
D. Oxygen
Answer: C
Ultrafiltration removes fluid via pressure gradients.
Question 9
Which pressure monitors venous outflow resistance?
A. Arterial pressure
B. Transmembrane pressure
, C. Venous pressure
D. Dialysate pressure
Answer: C
Venous pressure reflects resistance returning blood to the patient.
Question 10
A high venous pressure alarm may indicate:
A. Disconnected lines
B. Kinked venous tubing
C. Low blood volume
D. Air in arterial line
Answer: B
Kinks or clots increase resistance, raising venous pressure.
Question 11
What is the purpose of the heparin pump?
A. Increase blood flow
B. Prevent clotting in the extracorporeal circuit
C. Remove toxins
D. Control ultrafiltration
Answer: B
Heparin prevents blood clotting in the circuit.
Question 12
Which chemical is used to disinfect dialysis machines?
A. Sodium chloride
B. Formaldehyde
C. Glucose
D. Potassium chloride
Answer: B
Formaldehyde is commonly used for chemical disinfection.
Complete 200-Question Practice Exam with Answers &
Explanations| PDF
Overview:
This exam is designed for CHBT candidates to thoroughly prepare for certification. Covering all
key areas of hemodialysis equipment operation, patient safety, water quality, preventive
maintenance, and troubleshooting, this exam ensures a deep understanding of practical and
theoretical aspects of hemodialysis technology.
Topics Covered:
o Dialysis machine components and operation
o Transmembrane pressure (TMP) and ultrafiltration (UF)
o Water treatment and RO systems
o Dialysate preparation and quality control
o Machine alarms, sensors, and troubleshooting
o Chemical disinfection and safety protocols
o Documentation and regulatory compliance
o Preventive maintenance and calibration
Question 1
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
Answer: B
Hemodialysis machines remove metabolic wastes and excess fluids when kidneys fail.
Question 2
Which component of the dialysis system is responsible for diffusion?
A. Blood pump
B. Dialyzer
C. Heparin pump
D. Venous chamber
,Answer: B
The dialyzer allows diffusion of toxins across a semi-permeable membrane.
Question 3
What type of membrane is used in a dialyzer?
A. Impermeable membrane
B. Semi-permeable membrane
C. Fully permeable membrane
D. Synthetic solid membrane
Answer: B
Semi-permeable membranes allow selective transfer of solutes.
Question 4
Which water treatment component removes chlorine and chloramines?
A. Reverse osmosis (RO)
B. Carbon filter
C. Deionizer
D. Sediment filter
Answer: B
Carbon filters adsorb chlorine and chloramines from water.
Question 5
Excess chlorine in dialysis water can cause:
A. Hypotension
B. Hemolysis
C. Hypoglycemia
D. Air embolism
Answer: B
Chlorine damages red blood cells, leading to hemolysis.
,Question 6
What is the normal blood flow rate during adult hemodialysis?
A. 50–100 mL/min
B. 100–200 mL/min
C. 300–500 mL/min
D. 700–900 mL/min
Answer: C
Adult dialysis typically uses 300–500 mL/min blood flow.
Question 7
Which alarm indicates a possible blood leak?
A. Conductivity alarm
B. Air detector alarm
C. Blood leak detector alarm
D. Venous pressure alarm
Answer: C
Blood leak detectors sense red blood cells in dialysate.
Question 8
What does ultrafiltration remove during dialysis?
A. Electrolytes
B. Toxins only
C. Excess fluid
D. Oxygen
Answer: C
Ultrafiltration removes fluid via pressure gradients.
Question 9
Which pressure monitors venous outflow resistance?
A. Arterial pressure
B. Transmembrane pressure
, C. Venous pressure
D. Dialysate pressure
Answer: C
Venous pressure reflects resistance returning blood to the patient.
Question 10
A high venous pressure alarm may indicate:
A. Disconnected lines
B. Kinked venous tubing
C. Low blood volume
D. Air in arterial line
Answer: B
Kinks or clots increase resistance, raising venous pressure.
Question 11
What is the purpose of the heparin pump?
A. Increase blood flow
B. Prevent clotting in the extracorporeal circuit
C. Remove toxins
D. Control ultrafiltration
Answer: B
Heparin prevents blood clotting in the circuit.
Question 12
Which chemical is used to disinfect dialysis machines?
A. Sodium chloride
B. Formaldehyde
C. Glucose
D. Potassium chloride
Answer: B
Formaldehyde is commonly used for chemical disinfection.
