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Dental assistant exams

Dental assistant exam prep: free practice tests and exam guides

A free practice test for each exam, drawn from Dentalingo’s 1,520 questions: tap an answer to see at once whether it’s right, why, and the public source it was checked against, such as the CDC, OSHA or a U.S. Army dental manual. And the facts of each exam: how many questions, how long, and what it covers.

practice questions
1,520
exams
5
every answer sourced
100 %

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Dentalingo's question screen: a chairside question about a blood pressure reading, answered correctly, with the explanation below the options.
Answers explained the moment you choose

The exams

Exam facts read from danb.org on October 15, 2026.

Free reference

Tooth numbering chartAll 52 permanent and primary teeth in the Universal, Palmer and FDI systems, with a converter and a source for every rule.Open the tooth numbering chart
Radiolucent vs radiopaqueWhat looks dark and what looks light on a dental radiograph, and the three angulation errors.Read radiolucent vs radiopaqueDental instrumentsTwenty common hand instruments by name and use, and how a setup is laid out and passed.See the dental instruments

How the exams combine

The CDA® certification exam is made of three component exams, the RHS®, ICE® and GC exams, which can be taken together as one sitting of 245 questions in 195 minutes.

The NELDA® exam is made of the RHS®, ICE® and AMP exams: 230 questions in 180 minutes when taken together.

The CP exam is one of three component exams of the CPFDA® certification, with Sealants and Topical Fluoride. Eligibility rules differ by exam and pathway, and some states add requirements of their own; danb.org lists both.

Where the answers come from

Each question in Dentalingo is checked against a passage in a published source, and each answer here names that source and the section it comes from. Most are U.S. government works: CDC and OSHA guidance, FDA radiography criteria, and the Army and Navy manuals that train dental specialists.

How the questions are sourced

The app

Study on your phone with Dentalingo

Dentalingo has 1,520 questions across the RHS®, ICE®, GC, AMP and CP exams, every answer explained and checked against a cited source, and timed mock exams with each exam’s question count and time limit.

Lessons in a path, a few minutes a day, with streaks and daily goals, spaced review of the questions you missed, and readiness by exam domain.

The first 7 questions are free. After that, full access is a Study Camp subscription; the App Store shows the price in your country. More about the app

Download on the App Store
  • Dentalingo's Practice screen: daily quests and the questions due for spaced-repetition review.Spaced review of what you missed
  • Dentalingo's question screen: a chairside question about a blood pressure reading, answered correctly, with the explanation below the options.Answers explained the moment you choose
  • Dentalingo's Stats screen: answers graded, XP per day and an accuracy trend.XP and accuracy over time