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Hemodialysis Technician (CCHT) Practice
Exam Questions with Correct Answers &
Explanations | Graded A+ Study Guide.
1. The primary function of hemodialysis is to:
A) Cure chronic kidney disease
B) Remove waste products and excess fluid from the blood
C) Replace all kidney hormones
D) Filter lymph fluid
Answer: B
Rationale: Hemodialysis removes uremic waste products (urea,
creatinine) and excess fluid, but does not cure CKD nor replace
endocrine functions like erythropoietin production.
Q2. The normal range for blood pH is:
A) 7.00–7.25
B) 7.35–7.45
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C) 7.50–7.65
D) 6.80–7.00
Answer: B
Rationale: Normal arterial blood pH is tightly regulated
between 7.35 and 7.45. Acidosis (pH<7.35) is common in CKD
due to impaired acid excretion.
Q3. Which electrolyte is typically elevated in chronic kidney
disease requiring dialysis?
A) Sodium
B) Calcium
C) Potassium
D) Bicarbonate
Answer: C
Rationale: Potassium is often elevated (hyperkalemia) due to
decreased renal excretion, potentially causing cardiac
arrhythmias.
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Q4. Diffusion in hemodialysis refers to the movement of solutes:
A) From an area of low concentration to high concentration
B) From an area of high concentration to low concentration (down
a concentration gradient)
C) Across a semipermeable membrane against a concentration
gradient
D) With the use of a pressure gradient
Answer: B
Rationale: Diffusion is passive movement of solutes (like urea,
creatinine, potassium) down a concentration gradient from blood
to dialysate across the dialyzer membrane.
Q5. Ultrafiltration in hemodialysis refers to:
A) Removal of solutes by diffusion
B) Removal of fluid (plasma water) by pressure gradient across
the membrane (convection)
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C) Adding bicarbonate to the blood
D) Heating the dialysate
Answer: B
Rationale: Ultrafiltration is fluid removal driven by a
transmembrane pressure (TMP) gradient, not solute concentration
gradient.
Q6. The semipermeable membrane in a dialyzer allows passage
of:
A) Red blood cells
B) Large proteins (albumin)
C) Small molecules (urea, creatinine, potassium) and water
D) All blood components
Answer: C
Rationale: The membrane allows small solutes (MW < 500
daltons) and water to pass, but retains red blood cells, platelets,
and large proteins like albumin.
Hemodialysis Technician (CCHT) Practice
Exam Questions with Correct Answers &
Explanations | Graded A+ Study Guide.
1. The primary function of hemodialysis is to:
A) Cure chronic kidney disease
B) Remove waste products and excess fluid from the blood
C) Replace all kidney hormones
D) Filter lymph fluid
Answer: B
Rationale: Hemodialysis removes uremic waste products (urea,
creatinine) and excess fluid, but does not cure CKD nor replace
endocrine functions like erythropoietin production.
Q2. The normal range for blood pH is:
A) 7.00–7.25
B) 7.35–7.45
,Page 2 of 103
C) 7.50–7.65
D) 6.80–7.00
Answer: B
Rationale: Normal arterial blood pH is tightly regulated
between 7.35 and 7.45. Acidosis (pH<7.35) is common in CKD
due to impaired acid excretion.
Q3. Which electrolyte is typically elevated in chronic kidney
disease requiring dialysis?
A) Sodium
B) Calcium
C) Potassium
D) Bicarbonate
Answer: C
Rationale: Potassium is often elevated (hyperkalemia) due to
decreased renal excretion, potentially causing cardiac
arrhythmias.
,Page 3 of 103
Q4. Diffusion in hemodialysis refers to the movement of solutes:
A) From an area of low concentration to high concentration
B) From an area of high concentration to low concentration (down
a concentration gradient)
C) Across a semipermeable membrane against a concentration
gradient
D) With the use of a pressure gradient
Answer: B
Rationale: Diffusion is passive movement of solutes (like urea,
creatinine, potassium) down a concentration gradient from blood
to dialysate across the dialyzer membrane.
Q5. Ultrafiltration in hemodialysis refers to:
A) Removal of solutes by diffusion
B) Removal of fluid (plasma water) by pressure gradient across
the membrane (convection)
, Page 4 of 103
C) Adding bicarbonate to the blood
D) Heating the dialysate
Answer: B
Rationale: Ultrafiltration is fluid removal driven by a
transmembrane pressure (TMP) gradient, not solute concentration
gradient.
Q6. The semipermeable membrane in a dialyzer allows passage
of:
A) Red blood cells
B) Large proteins (albumin)
C) Small molecules (urea, creatinine, potassium) and water
D) All blood components
Answer: C
Rationale: The membrane allows small solutes (MW < 500
daltons) and water to pass, but retains red blood cells, platelets,
and large proteins like albumin.
