Free CNN Practice Tests (2026)
Start with the free diagnostic to see where you stand, then practice in tutor or timed mode. Full-length simulations match the real CNN.
Diagnostics
CNN Practice Test 1
10 questions · 12 min10 free CNN practice questions in the real exam format, covering the official content areas, with an explanation for every answer.
Start testPractice tests
CNN Practice Test 2
10 questions · 12 min10 free CNN practice questions in the real exam format, covering the official content areas, with an explanation for every answer.
Start testCNN Practice Test 3
5 questions · 10 min5 free CNN practice questions in the real exam format, covering the official content areas, with an explanation for every answer.
Start testHow these CNN practice tests match the real exam
The real Certified Nephrology Nurse (CNN) Exam has 150 questions and a 180-minute time limit. Question types: Multiple choice (single best answer); no calculator-dependent items. Each practice test here uses the same question formats, so you get used to how CNN questions are asked before test day.
The tests draw on every CNN content area, weighted like the official outline:
- Concepts of Kidney Disease Across the Life Span (about 30% of the exam)
- Acute In-patient Therapies (about 25% of the exam)
- Peritoneal Dialysis (about 20% of the exam)
- Home Hemodialysis (about 15% of the exam)
- Transplant (about 10% of the exam)
Use tutor mode to see the explanation after each answer, or timed mode to practise at real exam pace. Every answer comes with an explanation of why it is right and why the other options are wrong.