7.1 Knowledge Test Domain Review
Key Takeaways
- The 2026 Missouri Headmaster knowledge test is 75 multiple-choice questions, delivered in TMU, with 60 minutes and an 80% passing score.
- The official knowledge blueprint is a 12-subject-area count, not a vague five-topic checklist; Safety has the largest single count at 9 questions.
- Missouri written questions usually test CNA judgment: observe, report, protect rights, prevent infection, and stay inside delegated scope.
- Audio testing is available, but the last eight audio-version questions are not read aloud because they assess English reading comprehension.
Knowledge Test Domain Review
Missouri calls the written portion the knowledge exam or knowledge/audio exam. It is not a general healthcare trivia test. The 2026 D&S Headmaster Missouri Nurse Aide Candidate Handbook says the test has 75 multiple-choice questions selected from a Missouri DHSS-approved test plan, is delivered through TMU on internet-connected computers, allows 60 minutes, and requires a score of 80% or better. That means you need about 60 correct answers, but do not prepare by aiming for exactly 60. A CNA candidate who is weak in safety, infection control, or resident rights can miss easy judgment questions even after memorizing vocabulary.
Official written-test frame
| Item | Missouri knowledge-exam fact |
|---|---|
| Vendor | D&S Diversified Technologies / Headmaster under Missouri DHSS approval |
| Delivery | Electronic TMU testing at Missouri test sites; remote proctored knowledge testing is available when requirements are met |
| Format | 75 multiple-choice questions |
| Time | 60 minutes; candidates are told when 15 minutes remain |
| Passing standard | 80% or better on the knowledge portion |
| Access options | Audio version and Spanish alternate language options are available through the Headmaster process |
The 12 subject areas to study
The handbook lists subject-area counts. Treat the counts as a pacing map, not as separate walls. A transfer question can also test safety, communication, resident rights, and role boundaries.
| Subject area | Questions | High-yield CNA move |
|---|---|---|
| Safety | 9 | Prevent falls, fires, choking, injury, and unsafe equipment use |
| Basic Nursing Skills | 8 | Measure, assist, and report without diagnosing |
| Infection Control | 8 | Use hand hygiene, PPE, linen control, and isolation rules correctly |
| Personal Care | 8 | Bathe, dress, groom, feed, toilet, and protect privacy |
| Communication | 6 | Use clear, respectful, resident-centered communication |
| Disease Process | 6 | Recognize changes and report symptoms without naming diagnoses |
| Mental Health | 6 | Respond calmly to anxiety, depression, confusion, and distress |
| Aging Process and Restorative Care | 5 | Preserve function, independence, range of motion, and mobility |
| Care Impaired | 5 | Adjust care for cognitive, physical, or sensory limitations |
| Resident Rights | 5 | Respect privacy, refusal, choice, confidentiality, and dignity |
| Role and Responsibility | 5 | Follow the care plan, accept proper delegation, and report changes |
| Data Collection | 4 | Gather facts, record accurately, and route urgent findings promptly |
How Missouri questions are usually built
The safest answer usually keeps the CNA in the CNA role. If a stem says the resident has new shortness of breath, chest pain, sudden weakness, blood in urine, new confusion, choking, a fall, skin breakdown, or suspected abuse, the CNA does not treat independently or wait until charting time. The CNA stays with the resident when safety is immediate, calls or notifies the nurse, and reports objective facts.
The exam also punishes helpful-sounding overreach. Do not change oxygen flow, adjust medication, diagnose infection, tell a family member a medical explanation, insert or remove tubes, perform sterile treatment, or revise the care plan. If the nurse delegates a task that is unclear or appears outside your training, the CNA asks for clarification before acting.
Scenario traps to practice
A resident coughs twice while eating thickened liquids and says, "I am fine." The trap is to keep feeding because the resident gave permission. The safer CNA response is to stop feeding, keep the resident upright, observe for wet voice or breathing change, and report the swallowing concern.
A family member asks whether a new bruise means the resident was abused. The trap is to reassure, accuse, or speculate. The CNA protects privacy, reports the observation through the chain of command, follows Missouri abuse-reporting expectations when suspicion exists, and gives only need-to-know information to authorized staff.
A resident refuses a shower. The trap is to force care because the care plan says shower day. The CNA explains, offers reasonable choices, protects immediate hygiene and safety, and reports the refusal. Resident rights questions often test whether you can respect refusal while still keeping the nurse informed.
A facility aide notices that a resident's urine output is much lower than usual during the shift. The trap is to chart a guess, diagnose dehydration, or wait because Data Collection has only four questions on the official outline. The better answer is to measure accurately, record the amount using facility units, compare only to known baseline facts, and report the change promptly. Low-count areas still matter because they are tied to safety and nurse notification.
Build a 60-minute answering rhythm
Seventy-five questions in 60 minutes gives less than one minute per question. Do the direct CNA-role questions quickly, mark only the scenario stems that require careful reading, and return to them after the first pass. When two answers seem kind, choose the one that also protects safety, privacy, and reporting duties. When two answers seem medically smart, choose the one a CNA is legally allowed and trained to do.
Audio and remote knowledge testing
If you use the audio version, know what it does and does not solve. The handbook says the first 67 questions on English and Spanish audio exams are read orally, while the remaining 8 must be answered without audio assistance to assess English reading comprehension. Remote proctored knowledge testing can be convenient, but it is still a formal exam: candidates need the required device setup, internet connection, TMU login, smartphone/video check-in process, and a quiet private space. Do not schedule remote testing until you can meet every listed requirement.
Source anchors for this section
- 2026 Missouri Nurse Aide Candidate Handbook: knowledge test content, 75 questions, 60 minutes, 80% passing score, subject-area counts, audio and remote knowledge rules.
- Missouri DHSS CNA Registry FAQ: 75-question exam confirmation and Headmaster/TMU process.
- 19 CSR 30-84.010: Missouri training curriculum categories that align with written-exam content.
A candidate has one week left and wants to prioritize the largest single official Missouri knowledge subject area. Which area should receive the first extra review block?
During a practice question, a resident suddenly becomes short of breath after walking to the bathroom. What is the best CNA-centered response?
A candidate selects the audio version of the Missouri knowledge exam. Which statement matches the 2026 handbook?