Written Knowledge Exam Structure

What the Written Knowledge Exam Measures

Washington candidates almost always search for the "Washington CNA written test," but the official credential is Nursing Assistant Certified (NAC). The knowledge exam is the written, computer-delivered portion of certification; a separate hands-on skills evaluation handles practical competency through Credentia and Washington-approved processes. This chapter is about the knowledge exam only.

The knowledge exam is built from the National Nurse Aide Assessment Program (NNAAP), owned by the National Council of State Boards of Nursing (NCSBN) and administered in Washington by Credentia. It is not a memorization quiz of isolated facts. Every item is written as a short clinical situation, and your job is to pick the action a safe, competent entry-level nurse aide would take. The recurring theme across the whole test is resident safety, infection control, dignity, and reporting — when in doubt, the answer that protects the resident and keeps the nurse informed is usually correct.

The Fixed Format Facts

Memorize these numbers exactly — they appear on every Credentia Washington handbook:

The 10 pretest items are experimental questions Credentia is trialing for future exams. They look identical to scored items, you are never told which ones they are, and they do not count toward your score. The practical lesson: treat all 70 questions with equal seriousness, because you cannot guess which are "free."

With 60 scored items and 120 minutes, you have roughly 2 minutes per question — a comfortable pace for nurse aide content, with time left to review flagged items.

How Items Are Written

Every NNAAP item has a stem (the situation or question) and four answer options, exactly one of which is the best answer. Common stem patterns you will see again and again:

• "The nurse aide should first…" — tests priority/sequence. Safety, hand hygiene, and explaining a procedure to the resident usually come early.
• "Which action is correct/safe?" — tests technique (transfers, positioning, feeding, vital signs).
• "The nurse aide should report…" — tests recognizing changes (skin breakdown, choking, behavior change) and chain of command.
• "This protects the resident's right to…" — tests residents' rights, privacy, and dignity.

Distractors (wrong options) are usually plausible-sounding but unsafe, outside the aide's scope (e.g., giving medication or diagnosing), or skip a step. Learn to spot the option that delays care, ignores safety, or oversteps the aide role — it is almost always wrong.

No Penalty for Guessing

There is no penalty for a wrong answer, so never leave a scored item blank. An unanswered item is scored exactly like a wrong one (zero), while a guess gives you a 25% chance. Answer every question, and use the flag/review tool to revisit uncertain items before time expires.

Where the Knowledge Exam Fits in Certification

The written knowledge exam is one of two competency components required by federal OBRA law for nurse aides: a knowledge (written or oral) exam and a hands-on skills evaluation. This chapter covers the knowledge component; both must be passed to be placed on the registry. Understanding that split prevents a common mistake — assuming the written test is the whole exam. It is not, but it is the part most often failed because candidates underestimate the breadth of the NNAAP outline.

The computer interface is straightforward: one question on screen at a time, four clickable options, Next and Previous navigation, a Flag/Mark for Review button, and a question counter and timer. You may move freely backward and forward through all 70 items and change any answer before you submit. There are no calculators, scratch tools, or reference materials — the exam is closed-book, so every fact you need must be in your head on test day.

What the Exam Is — and Isn't

The knowledge exam is not:

• A nursing exam — it never asks you to diagnose, prescribe, or perform nurse-level judgment.
• A pure recall quiz — most items embed a fact inside a scenario and reward applying it safely.
• Negatively marked — wrong answers cost nothing beyond the lost point.

The knowledge exam is:

• Entry-level and practical — it asks what a brand-new, safe nurse aide would do.
• Scenario-driven — read the situation, then choose the safest in-scope action.
• Standardized — the same NNAAP content outline governs every form, so a well-built study plan transfers directly to test day.

Keep the fixed numbers anchored: 70 items, 60 scored, 10 pretest, 4 options, 2 hours, 4 attempts. Those six figures frame everything else in this chapter.

Because the test is standardized nationally through NNAAP and only customized by Washington for registry and certificate logistics, the content you study from any current NNAAP-aligned source applies directly. Trust the official Credentia Washington handbook for the numbers above over any third-party site, since vendors sometimes quote outdated counts from earlier outline versions.