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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.

1Hand hygieneTypically first2MeasurementPulse, BP, weight…3Skill 3Drawn from list4Skill 4Drawn from list5Skill 5Drawn from listPass all five skills to pass the evaluation
Typical NNAAP format, based on Credentia materials. Your state's handbook may differ.

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

Introducing yourself and explaining the procedure, providing privacy, washing or sanitizing your hands, locking bed or wheelchair wheels before a transfer, leaving the call light (signaling device) within reach, and returning the bed to a low position.

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:

  1. Address the client and introduce yourself.
  2. Turn on the water, wet your hands and wrists, and apply soap.
  3. 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.
  4. Clean under your fingernails by rubbing your fingertips against the opposite palm.
  5. Rinse all surfaces, still keeping your hands lower than your elbows with fingertips down.
  6. Dry with clean paper towels from fingertips to wrists, then throw them away.
  7. Turn off the faucet with a clean, dry paper towel (or a knee/foot control).
  8. 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 tolerances on Credentia's NNAAP skills list (as of October 2026). Your state's list may differ.
Measurement skillYour 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 outputRead 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?

  1. Get your state’s current skills list and rewrite each skill’s critical steps on an index card.
  2. Perform every skill at least twice, saying each step out loud.
  3. Have a partner act as evaluator, read the checklist and time you.
  4. Do ten pulse and respiration counts with a partner and compare numbers.
  5. Practice your opening routine until it’s automatic: knock, introduce yourself, identify the client, explain, provide privacy and do hand hygiene.
  6. 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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Frequently asked questions

How many skills are on the CNA skills exam?
In states that use the NNAAP exam, candidates typically perform five skills, which usually include hand hygiene and one measurement skill such as pulse, respirations, blood pressure, weight or urine output. Other testing programs use different numbers, so check your state's handbook.
What happens if I miss a step on the CNA skills test?
Missing an ordinary step costs you points on that skill, but missing a critical element step (shown in bold on the NNAAP skills list) means you fail that skill. In the NNAAP format you must pass every skill to pass the skills evaluation.
How accurate do my measurements need to be?
Credentia's NNAAP skills list requires readings within a set range of the evaluator's: ±4 beats for radial pulse, ±2 breaths for respirations, ±2 pounds for weight, and ±8 mm Hg for each number of a manual blood pressure.
Is the CNA skills test done on a real person?
Usually you work with a volunteer or another candidate acting as the client, and some skills may use a mannequin. You should treat them exactly as you would a real resident: introduce yourself, explain the procedure and provide privacy.
Can I retake just the skills part of the CNA exam?
Yes. If you pass the written test but fail the skills evaluation, you normally retake only the skills part and pay the skills retest fee. Attempt limits apply in most states.

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.