Practice questions on basic nursing skills, personal care, infection control, and residents' rights, matching the format used by D&S Diversified Technologies / Headmaster in Missouri. 75 questions on the real written exam, 80% to pass. Full explanations on every answer.
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The Missouri Certified Nursing Assistant competency exam is administered by D&S Diversified Technologies / Headmaster, under the oversight of the Missouri Department of Health and Senior Services. It combines a 75-question written (or oral) knowledge test requiring 80% to pass with a hands-on skills evaluation. Notably high 175-hour training requirement and 80% written passing score, both above the national norm; both exams must be passed within 1 year of training start.
The Missouri CNA written exam covers real clinical knowledge, from infection control to residents' rights under federal OBRA 1987 protections. Practising realistic multiple-choice questions with full explanations builds the recall speed you need, especially for scenario-based questions that test judgment, not just memorization.
| Feature | Free Online Guides | TestReadyUSA |
|---|---|---|
| Practice questions | ✗ Limited, inconsistent quality | ✓ 105+ questions |
| Answer explanations | ✗ Rarely explained | ✓ Every question |
| Missouri-specific facts | ✗ Generic content | ✓ Real Missouri vendor and training facts |
| Drill by topic | ✗ No | ✓ Yes |
Practice one topic at a time. Start with Basic Nursing Skills and Personal Care Skills, the most heavily tested areas on the CNA exam.
Study Guide: Missouri
About the real test in Missouri
75 questions, 80% to pass, administered by D&S Diversified Technologies / Headmaster. Certification renews every 2 years.
About the CNA (Nursing Assistant), nationwide
The CNA written competency exam is administered state by state, most commonly through Credentia (NNAAP), Prometric, or D&S/Headmaster, but the underlying content domains, basic nursing skills, personal care skills, residents' rights, and infection control, are set nationally and tested everywhere.
Basic Nursing Skills and Personal Care Skills carry the most weight combined
Vital signs, positioning and transfers, and activities of daily living make up the largest share of most state exams. These are also the skills tested again on the hands-on skills portion, so mastering them pays off twice.
Residents' Rights questions have a clear, correct pattern
The right answer almost always favors dignity, privacy, choice, and informed consent. When in doubt between two options, choose the one that respects the resident's autonomy.
Know your state's specific vendor and renewal requirements
Testing vendor, question count, and renewal periods vary by state, some renew every 2 years, others require registry renewal on a different cycle. Confirm your state's specific process before test day.
Why TestReadyUSA works for the CNA (Nursing Assistant)
TestReadyUSA's CNA practice covers the national knowledge domains used by every state nurse aide registry, with real per-state testing-vendor, question-count, and renewal facts for wherever you're getting certified.