CDN EXAM 2026 - COMPLETE TEST BANK WITH
200 REAL EXAM QUESTIONS & VERIFIED
ANSWERS
CDN EXAM 2026 – COMPLETE TEST BANK
Certified Dialysis Nurse | NNCC Certification
Total Questions: 200+
Type: Multiple Choice
Academic Year: 2025/2026
Source: Verified from NNCC Blueprint and Official Updates
DOMAIN 1: HEMODIALYSIS PROCEDURES
QUESTION 1
What is the primary function of the kidneys?
A) Produce red blood cells
B) Remove water and waste from the blood
C) Regulate blood sugar levels
D) Produce digestive enzymes
1
,Correct Answer: B
Explanation: The kidneys filter blood, removing waste products (urea, creatinine)
and excess water to form urine. They also maintain electrolyte and acid-base
balance.
QUESTION 2
The normal glomerular filtration rate (GFR) in a healthy adult is approximately:
A) 15-20 mL/min
B) 30-40 mL/min
C) 90-120 mL/min
D) 200-250 mL/min
Correct Answer: C
Explanation: Normal GFR is 90-120 mL/min/1.73m². A GFR below 15 mL/min
indicates kidney failure requiring dialysis.
QUESTION 3
Which of the following is a common indication for initiating hemodialysis?
A) GFR > 60 mL/min
B) Serum creatinine < 1.0 mg/dL
C) Uremic symptoms with GFR < 15 mL/min
D) Blood pressure 120/80 mmHg
2
,Correct Answer: C
Explanation: Dialysis is typically initiated when GFR falls below 15 mL/min and
the patient exhibits uremic symptoms (nausea, fatigue, confusion, pericarditis).
QUESTION 4
During hemodialysis, blood is pumped from the patient through the dialyzer and
returned. The blood flow rate is typically set at:
A) 50-100 mL/min
B) 150-300 mL/min
C) 300-500 mL/min
D) 600-800 mL/min
Correct Answer: C
Explanation: Blood flow rates in hemodialysis are typically 300-500 mL/min,
depending on vascular access and patient tolerance.
QUESTION 5
The dialysate flow rate in hemodialysis is typically:
A) 100-200 mL/min
B) 300-500 mL/min
C) 500-800 mL/min
D) 1000-1500 mL/min
3
, Correct Answer: C
Explanation: Dialysate flow rate is typically 500-800 mL/min to maintain
concentration gradients for efficient solute removal.
QUESTION 6
The dialyzer membrane that allows the passage of small and medium molecules is
called:
A) Low-flux membrane
B) High-flux membrane
C) Cellulose membrane
D) Synthetic membrane
Correct Answer: B
Explanation: High-flux membranes have larger pore sizes, allowing removal of
both small solutes (urea) and medium molecules (β2-microglobulin).
QUESTION 7
Ultrafiltration during hemodialysis removes:
A) Only waste products
B) Only excess fluid
C) Both fluid and waste products
D) Only electrolytes
4
200 REAL EXAM QUESTIONS & VERIFIED
ANSWERS
CDN EXAM 2026 – COMPLETE TEST BANK
Certified Dialysis Nurse | NNCC Certification
Total Questions: 200+
Type: Multiple Choice
Academic Year: 2025/2026
Source: Verified from NNCC Blueprint and Official Updates
DOMAIN 1: HEMODIALYSIS PROCEDURES
QUESTION 1
What is the primary function of the kidneys?
A) Produce red blood cells
B) Remove water and waste from the blood
C) Regulate blood sugar levels
D) Produce digestive enzymes
1
,Correct Answer: B
Explanation: The kidneys filter blood, removing waste products (urea, creatinine)
and excess water to form urine. They also maintain electrolyte and acid-base
balance.
QUESTION 2
The normal glomerular filtration rate (GFR) in a healthy adult is approximately:
A) 15-20 mL/min
B) 30-40 mL/min
C) 90-120 mL/min
D) 200-250 mL/min
Correct Answer: C
Explanation: Normal GFR is 90-120 mL/min/1.73m². A GFR below 15 mL/min
indicates kidney failure requiring dialysis.
QUESTION 3
Which of the following is a common indication for initiating hemodialysis?
A) GFR > 60 mL/min
B) Serum creatinine < 1.0 mg/dL
C) Uremic symptoms with GFR < 15 mL/min
D) Blood pressure 120/80 mmHg
2
,Correct Answer: C
Explanation: Dialysis is typically initiated when GFR falls below 15 mL/min and
the patient exhibits uremic symptoms (nausea, fatigue, confusion, pericarditis).
QUESTION 4
During hemodialysis, blood is pumped from the patient through the dialyzer and
returned. The blood flow rate is typically set at:
A) 50-100 mL/min
B) 150-300 mL/min
C) 300-500 mL/min
D) 600-800 mL/min
Correct Answer: C
Explanation: Blood flow rates in hemodialysis are typically 300-500 mL/min,
depending on vascular access and patient tolerance.
QUESTION 5
The dialysate flow rate in hemodialysis is typically:
A) 100-200 mL/min
B) 300-500 mL/min
C) 500-800 mL/min
D) 1000-1500 mL/min
3
, Correct Answer: C
Explanation: Dialysate flow rate is typically 500-800 mL/min to maintain
concentration gradients for efficient solute removal.
QUESTION 6
The dialyzer membrane that allows the passage of small and medium molecules is
called:
A) Low-flux membrane
B) High-flux membrane
C) Cellulose membrane
D) Synthetic membrane
Correct Answer: B
Explanation: High-flux membranes have larger pore sizes, allowing removal of
both small solutes (urea) and medium molecules (β2-microglobulin).
QUESTION 7
Ultrafiltration during hemodialysis removes:
A) Only waste products
B) Only excess fluid
C) Both fluid and waste products
D) Only electrolytes
4
