CCHT Practice Exam Test Bank - Complete
Study Guide with Actual Exam Questions
with Answers and Rationales | Latest
Updated Edition 2026/2027- Graded A+
Question 1
Which of the following is used to prevent air in the bloodlines?
A. Insert a bite block
B. Increase the CPAP pressure
C. Tighten all connections
D. Maintain prescribed blood flow rates
Answer: C
Rationale: Tightening all connections prevents air from entering the bloodlines by
ensuring a closed system.
Question 2
Which of the following is the classic sign of hemolysis?
A. Dark brown, coffee-ground colored blood
B. Clear, straw-colored fluid in the venous line
C. Cranberry juice colored blood in the venous line
D. Dark red blood with a cherry-like odor
Answer: A
Rationale: Hemolysis causes blood to appear dark brown or coffee-ground colored due
to the release of hemoglobin from ruptured red blood cells.
Question 3
The normal range of resting respirations in an adult is:
A. 30-40 breaths per min
B. 8-10 breaths per min
C. 24-28 breaths per min
D. 12-20 breaths per min
Answer: D
Rationale: Normal resting respiratory rate for adults is 12-20 breaths per minute.
pg. 1
,Question 4
In order to maximize access recirculation, the technician should place Mrs. Miller's
fistula needle:
A. Two red blood cells
B. Tighten all connections
C. As far apart as possible
D. Notify the nurse of the need for an assessment
Answer: C
Rationale: Placing arterial and venous needles as far apart as possible minimizes
recirculation by preventing dialyzed blood from being immediately re-dialyzed.
Question 5
Which action increases diffusion during dialysis?
A. Using a bath with a lower concentration
B. Using a bath with a greater concentration
C. Increasing the blood flow rate
D. Decreasing the dialyzer membrane surface area
Answer: B
Rationale: Using a dialysate bath with a greater concentration gradient increases
diffusion by creating a larger difference in solute concentration between blood and
dialysate.
Question 6
The air detector alarms during treatment. If the machine is working properly, the
dialysis technician should expect which of these events to have occurred?
A. Electrical power source was interrupted
B. Blood pump has stopped
C. Dialysate temperature has increased
D. Dialysate flow rate has increased
Answer: B
Rationale: When the air detector alarms, the blood pump stops to prevent air from
entering the patient's bloodstream.
Question 7
The functional unit of the kidney is the:
A. Ureter
pg. 2
,B. Nephron
C. Renal Tubule
D. Cortex
Answer: B
Rationale: The nephron is the functional unit of the kidney responsible for filtering
blood and producing urine.
Question 8
Abnormal accumulation of fluid in the body tissues causing swelling. Fluid accumulated
in the interstitial space:
A. Osmosis
B. Edema
C. Erythema
D. Thrombosis
Answer: B
Rationale: Edema is the abnormal accumulation of fluid in the interstitial space,
causing swelling.
Question 9
One reason that normal saline is used to rinse and prime the extracorporeal circuit prior
to treatment is to remove:
A. Blood
B. Fat
C. Air
D. Water
Answer: C
Rationale: Priming with normal saline removes air from the extracorporeal circuit,
preventing air embolism.
Question 10
The minimum dwell time to achieve sterilization with the chemical Renalin is:
A. 1 hour
B. 10 minutes
C. 72 hours
D. 24 hours
Answer: D
Rationale: Renalin requires a minimum dwell time of 24 hours to achieve sterilization
of the dialyzer.
pg. 3
, Question 11
One cause of aneurysms and pseudoaneurysms is:
A. Inadequate dialyzer priming
B. Poor rotation of sites
C. Inappropriate use of tourniquets
D. Infection
Answer: B
Rationale: Poor rotation of needle sites causes repeated puncture in the same area,
leading to weakening of the vessel wall and aneurysm formation.
Question 12
A marker used to determine the middle molecule clearance of a dialyzer is:
A. Hemoglobin
B. Albumin
C. Creatinine
D. Vitamin B12
Answer: D
Rationale: Vitamin B12 is used as a marker for middle molecule clearance because its
molecular size is representative of middle molecules.
Question 13
What is a semipermeable membrane?
A. Very thin flexible sheets of material, such as cellophane, with pores that allow smaller
particles or molecules to pass through while blocking larger ones.
B. A synthetic tube that connects the patient's artery to the dialyzer machine.
C. A solid barrier that prevents all molecules from passing through to the other side.
D. A type of filter used to remove bacteria from the blood before it enters the dialyzer.
Answer: A
Rationale: A semipermeable membrane has pores that allow small particles to pass
while blocking larger ones, enabling diffusion and ultrafiltration.
Question 14
A medication used to treat anemia is:
A. Neupogen
B. Biacin
C. Fragmin
pg. 4
Study Guide with Actual Exam Questions
with Answers and Rationales | Latest
Updated Edition 2026/2027- Graded A+
Question 1
Which of the following is used to prevent air in the bloodlines?
A. Insert a bite block
B. Increase the CPAP pressure
C. Tighten all connections
D. Maintain prescribed blood flow rates
Answer: C
Rationale: Tightening all connections prevents air from entering the bloodlines by
ensuring a closed system.
Question 2
Which of the following is the classic sign of hemolysis?
A. Dark brown, coffee-ground colored blood
B. Clear, straw-colored fluid in the venous line
C. Cranberry juice colored blood in the venous line
D. Dark red blood with a cherry-like odor
Answer: A
Rationale: Hemolysis causes blood to appear dark brown or coffee-ground colored due
to the release of hemoglobin from ruptured red blood cells.
Question 3
The normal range of resting respirations in an adult is:
A. 30-40 breaths per min
B. 8-10 breaths per min
C. 24-28 breaths per min
D. 12-20 breaths per min
Answer: D
Rationale: Normal resting respiratory rate for adults is 12-20 breaths per minute.
pg. 1
,Question 4
In order to maximize access recirculation, the technician should place Mrs. Miller's
fistula needle:
A. Two red blood cells
B. Tighten all connections
C. As far apart as possible
D. Notify the nurse of the need for an assessment
Answer: C
Rationale: Placing arterial and venous needles as far apart as possible minimizes
recirculation by preventing dialyzed blood from being immediately re-dialyzed.
Question 5
Which action increases diffusion during dialysis?
A. Using a bath with a lower concentration
B. Using a bath with a greater concentration
C. Increasing the blood flow rate
D. Decreasing the dialyzer membrane surface area
Answer: B
Rationale: Using a dialysate bath with a greater concentration gradient increases
diffusion by creating a larger difference in solute concentration between blood and
dialysate.
Question 6
The air detector alarms during treatment. If the machine is working properly, the
dialysis technician should expect which of these events to have occurred?
A. Electrical power source was interrupted
B. Blood pump has stopped
C. Dialysate temperature has increased
D. Dialysate flow rate has increased
Answer: B
Rationale: When the air detector alarms, the blood pump stops to prevent air from
entering the patient's bloodstream.
Question 7
The functional unit of the kidney is the:
A. Ureter
pg. 2
,B. Nephron
C. Renal Tubule
D. Cortex
Answer: B
Rationale: The nephron is the functional unit of the kidney responsible for filtering
blood and producing urine.
Question 8
Abnormal accumulation of fluid in the body tissues causing swelling. Fluid accumulated
in the interstitial space:
A. Osmosis
B. Edema
C. Erythema
D. Thrombosis
Answer: B
Rationale: Edema is the abnormal accumulation of fluid in the interstitial space,
causing swelling.
Question 9
One reason that normal saline is used to rinse and prime the extracorporeal circuit prior
to treatment is to remove:
A. Blood
B. Fat
C. Air
D. Water
Answer: C
Rationale: Priming with normal saline removes air from the extracorporeal circuit,
preventing air embolism.
Question 10
The minimum dwell time to achieve sterilization with the chemical Renalin is:
A. 1 hour
B. 10 minutes
C. 72 hours
D. 24 hours
Answer: D
Rationale: Renalin requires a minimum dwell time of 24 hours to achieve sterilization
of the dialyzer.
pg. 3
, Question 11
One cause of aneurysms and pseudoaneurysms is:
A. Inadequate dialyzer priming
B. Poor rotation of sites
C. Inappropriate use of tourniquets
D. Infection
Answer: B
Rationale: Poor rotation of needle sites causes repeated puncture in the same area,
leading to weakening of the vessel wall and aneurysm formation.
Question 12
A marker used to determine the middle molecule clearance of a dialyzer is:
A. Hemoglobin
B. Albumin
C. Creatinine
D. Vitamin B12
Answer: D
Rationale: Vitamin B12 is used as a marker for middle molecule clearance because its
molecular size is representative of middle molecules.
Question 13
What is a semipermeable membrane?
A. Very thin flexible sheets of material, such as cellophane, with pores that allow smaller
particles or molecules to pass through while blocking larger ones.
B. A synthetic tube that connects the patient's artery to the dialyzer machine.
C. A solid barrier that prevents all molecules from passing through to the other side.
D. A type of filter used to remove bacteria from the blood before it enters the dialyzer.
Answer: A
Rationale: A semipermeable membrane has pores that allow small particles to pass
while blocking larger ones, enabling diffusion and ultrafiltration.
Question 14
A medication used to treat anemia is:
A. Neupogen
B. Biacin
C. Fragmin
pg. 4
