CNA Skills Exam: What to Expect and How to Pass the Clinical Test
How the CNA skills exam works: how many skills you perform, critical steps, hand hygiene, measurement tolerances, why people fail and a practice checklist.
By PSI Exams Prep Editorial Team 7 min read

The CNA skills exam is the part of the nurse aide competency test that worries people most, and for good reason. You perform real care tasks while an evaluator checks each step against a checklist. The good news is that the skills test is completely predictable: the skills, the steps and the scoring rules are published in advance. This guide explains how the clinical test works, the steps you can’t miss, and a checklist for the week before.
How does the CNA skills exam work?
You’ll be in a room set up like a resident’s room, with an evaluator and someone acting as the client (sometimes a mannequin for certain skills). The evaluator gives you your assigned skills and a time limit, then watches and scores each step. You don’t have to explain the scoring. You just need to perform the care correctly and safely.
In states that use the NNAAP, Credentia’s training materials describe every exam form beginning with hand hygiene and including one measurement skill, with candidates required to pass all five skills. Programs run by other testing companies may use a different number of skills or scoring rules, so read your own candidate handbook carefully. For the written side of the exam and costs, see is the CNA exam hard?
What are critical element steps?
Every skill on the list is broken into numbered steps. On Credentia’s NNAAP skills list, critical element steps are printed in bold. These are the steps that protect the client’s safety, rights and infection control, plus any recorded measurement. Missing a regular step costs you, but missing a critical step means you fail that skill, no matter how well you did the rest.
The steps people forget under pressure
How do you pass the hand hygiene skill?
Hand hygiene comes up on almost every exam and is part of nearly every other skill, so it’s worth perfecting. Based on Credentia’s NNAAP skills list, the key actions are:
- Address the client and introduce yourself.
- Turn on the water, wet your hands and wrists, and apply soap.
- Lather all surfaces of your wrists, hands and fingers with friction for at least 20 seconds, keeping your hands lower than your elbows and your fingertips pointing down.
- Clean under your fingernails by rubbing your fingertips against the opposite palm.
- Rinse all surfaces, still keeping your hands lower than your elbows with fingertips down.
- Dry with clean paper towels from fingertips to wrists, then throw them away.
- Turn off the faucet with a clean, dry paper towel (or a knee/foot control).
- Never touch the inside of the sink.
How accurate do measurements need to be?
Your recorded number is compared with the evaluator’s. Credentia’s NNAAP skills list sets these tolerances:
| Measurement skill | Your reading must be within |
|---|---|
| Radial pulse (count a full minute) | ±4 beats of the evaluator's reading |
| Respirations | ±2 breaths of the evaluator's reading |
| Weight of an ambulatory client | ±2 lb (±0.9 kg) of the evaluator's reading |
| Manual blood pressure | ±8 mm Hg for both systolic and diastolic |
| Electronic blood pressure (state-specific) | Recorded exactly as shown on the display |
| Urinary output | Read at eye level on a flat surface; round up to the nearest 25 mL between lines |
Count pulse and respirations for a full 60 seconds, wash your hands before recording, and write the number down immediately so you don’t forget it.
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Which skills can you be asked to perform?
Credentia’s NNAAP skills list includes tasks such as:
- Hand hygiene; donning and removing a gown and gloves
- Counting and recording radial pulse and respirations; measuring blood pressure, weight and urinary output
- Assisting to ambulate with a transfer belt; transferring from bed to wheelchair with a transfer belt; positioning on the side
- Assisting with a bedpan; providing catheter care, perineal care, mouth care and denture cleaning
- Giving a modified bed bath; providing foot care; applying a knee-high elastic stocking
- Dressing a client with a weak arm; feeding a client who can’t feed themselves
- Passive range of motion for a shoulder, or for a knee and ankle
Your state may add or remove skills, so practice from your own handbook’s list.
Why do people fail the CNA skills test?
- Rushing. Nerves make people skip steps they know well, like introducing themselves or providing privacy.
- Infection-control slips. Touching the sink, contaminating clean gloves, or forgetting hand hygiene before recording.
- Safety misses. Unlocked wheels, no non-skid footwear before standing, or leaving the bed high.
- Measurements out of range. Counting for 30 seconds and doubling, or misreading the scale or graduate.
- Leaving the client without the call light within reach.
What should you practice the week before the skills test?
- Get your state’s current skills list and rewrite each skill’s critical steps on an index card.
- Perform every skill at least twice, saying each step out loud.
- Have a partner act as evaluator, read the checklist and time you.
- Do ten pulse and respiration counts with a partner and compare numbers.
- Practice your opening routine until it’s automatic: knock, introduce yourself, identify the client, explain, provide privacy and do hand hygiene.
- Check what to wear and bring (scrubs, closed-toe shoes, watch with a second hand, ID) in your handbook.
Pair your skills practice with daily written practice so both parts feel familiar. If your knowledge test is at a computer testing center, our exam day guide covers ID rules and check-in.
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Practice 475 nurse aide questions on infection control, patient care, safety and emergencies, resident rights and more, with an explanation for every answer.
Start practicing freeFrequently asked questions
How many skills are on the CNA skills exam?
What happens if I miss a step on the CNA skills test?
How accurate do my measurements need to be?
Is the CNA skills test done on a real person?
Can I retake just the skills part of the CNA exam?
PSI Exams Prep is an independent study tool and is not affiliated with or endorsed by PSI Services LLC. Exam details change and vary by state. Always confirm requirements in the official Candidate Information Bulletin for your exam.

