What is the passing score for the RDA exam?

The passing score for the RDA Written Examination administered by the Dental Board of California is a scaled score of 75 out of 100. This scaled scoring method accounts for slight variations in exam difficulty across different test forms. You will receive your pass or fail result at the testing center immediately after completing the computer-based examination.

How do I register for the RDA exam?

To register for the RDA exam in California, you must submit an application to the Dental Board of California along with the required fee. Once your application is approved, you will receive authorization to schedule your exam at a PSI testing center. You can then book your appointment online through the PSI website or by calling their registration line directly.

What is the format of the RDA written exam?

The RDA Written Examination is a multiple-choice, computer-based test administered at PSI testing centers throughout California. You are given two hours to complete the exam. Questions are presented one at a time on screen, and you can flag questions to review before submitting your final answers. No reference materials or calculators are permitted during testing.

How much does the RDA exam cost?

The RDA Written Examination fee is $60, payable to the Dental Board of California as part of your application. There is also a separate application processing fee of $50, bringing the initial total to $110. If you need to retake the exam, you must pay the $60 examination fee again for each additional attempt. These fees are non-refundable regardless of the outcome.

Can I retake the RDA exam if I fail?

Yes, you can retake the RDA Written Examination if you do not pass on your first attempt. There is no mandatory waiting period between attempts, but you must submit a new examination fee of $60 for each retake. The Dental Board does not limit the number of times you can retake the written exam, though you must maintain valid eligibility throughout the process.

What are the best ways to prepare for the RDA exam?

Focus your study on infection control, dental materials, dental anatomy, and chairside assisting procedures, as these make up the largest portions of the exam. Use practice tests to identify weak areas and simulate timed testing conditions. Review the Dental Board of California's published exam plan, which outlines exact content categories and their weight percentages, so you can allocate study time proportionally.

How long is the RDA certification valid once obtained?

RDA certification in California is valid for two years from the date of issuance. To renew, you must complete at least 25 hours of approved continuing education courses during each renewal period, including mandatory courses in infection control and the California Dental Practice Act. The renewal fee is $50, and late renewals incur an additional penalty equal to half the renewal fee.

What is the RDA Practical Examination and is it required?

In addition to the written exam, California requires RDA candidates to pass the RDA Practical Examination, which tests hands-on clinical skills. This exam evaluates your ability to perform procedures such as taking dental impressions, fabricating temporary crowns, and applying coronal polish. It is administered at designated clinical testing sites and must be passed along with the written exam to obtain full RDA licensure.

RDA Practice Test

Updated for August 2026

Dr. Sarah MitchellAug 1, 202612 min read

⏱️3 HoursTime Limit

📝100Questions

✅75%Pass Rate

💵$125Exam Fee

Note: RDA Requirements and exam details can vary by state. Always verify specific regulations with your state's dental board or the Dental Assisting National Board (DANB).

Rda Practice Test - Registered Dental Assistant study guide

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RDA Exam Flashcards

Quick review of essential RDA concepts

🦷What is coronal polishing?

Coronal polishing is a procedure used to remove stain and plaque from the enamel surfaces of the teeth. It is a common duty for an RDA.

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☢️What is the purpose of a lead apron?

A lead apron is used to protect the patient's reproductive and blood-forming tissues from scatter radiation during dental x-ray procedures.

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🧼What is sterilization?

Sterilization is the process that kills all forms of life, including bacterial spores, viruses, bacteria, and fungi. It is critical in dental settings.

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📋What does HIPAA protect?

HIPAA protects the privacy and security of a patient's health information. An RDA must ensure patient records are kept confidential.

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💉What is the bevel of a needle?

The bevel is the slanted tip of the needle that penetrates the soft tissues. Correct orientation is important for patient comfort during injections.

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⚖️What is direct supervision?

Direct supervision means the dentist has delegated a specific procedure to be performed for a patient of record and is physically present in the office.

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RDA Exam Study Guide

This RDA Study Guide breaks down the core components of the examination. Understanding these basics is crucial for passing the RDA License test and starting your career in dental assisting.

What is the RDA exam?	The RDA exam is a certification test for dental assistants. It verifies that a candidate has the necessary knowledge and skills to perform expanded duties safely and effectively.
Who needs to take the RDA test?	Individuals who want to become a Registered Dental Assistant must take this test. It is required in states like California and Texas for advanced practice.
What does RDA stand for?	RDA stands for Registered Dental Assistant. It is a professional credential that allows dental assistants to perform specific procedures under supervision.
What is the difference between RDA and CDA?	An RDA License is state-specific (e.g., California), while a CDA (Certified Dental Assistant) is a national certification from DANB. Some states accept the CDA for licensure.

What is the RDA exam?

The RDA exam is a certification test for dental assistants. It verifies that a candidate has the necessary knowledge and skills to perform expanded duties safely and effectively.

Who needs to take the RDA test?

Individuals who want to become a Registered Dental Assistant must take this test. It is required in states like California and Texas for advanced practice.

What does RDA stand for?

RDA stands for Registered Dental Assistant. It is a professional credential that allows dental assistants to perform specific procedures under supervision.

What is the difference between RDA and CDA?

An RDA License is state-specific (e.g., California), while a CDA (Certified Dental Assistant) is a national certification from DANB. Some states accept the CDA for licensure.

Topics: Disinfection, waste management, protocols.
Questions: ~20-40 Questions

RDA Practice Test Questions

Prepare for the RDA - Registered Dental Assistant exam with our free practice test modules. Each quiz covers key topics to help you pass on your first try.

RDA Assisting with Administration of Anest...

RDA Exam Questions covering Assisting with Administration of Anesthesia and Sedation Questions and Answers. Master RDA Test concepts for certification prep.

RDA Dental Charting, Tooth Morphology, and...

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RDA Instrument Processing, Sterilization, ...

RDA Test Prep for Instrument Processing, Sterilization, and Monitoring Questions and Answers. Practice RDA Quiz questions and boost your score.

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RDA Restorative and Impression Materials Q...

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RDA State Dental Practice Act and Legal/Et...

RDA Practice Questions for State Dental Practice Act and Legal/Ethical Responsibilities Questions and Answers. Build confidence for your RDA certification exam.

RDA Assisting with Administration of Anest...

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RDA Dental Charting, Tooth Morphology, and...

RDA Study Material on Dental Charting, Tooth Morphology, and Occlusion. Prepare effectively with real exam-style questions.

RDA Dental Instruments and Tray Setups

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RDA Dental Pharmacology and Pain Management

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RDA Dental Specialties Assisting (Orthodon...

Free RDA Practice Test featuring Dental Specialties Assisting (Orthodontics, Periodontics, Oral Surgery, Endodontics, and Prosthodontics). Improve your RDA Exam score with mock test prep.

RDA Head, Neck, and Oral Anatomy

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RDA Infection Control and Barrier Techniques

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RDA Instrument Processing, Sterilization, ...

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RDA Job Responsibilities and Duties

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RDA Preventive Dentistry and Patient Educa...

Free RDA Quiz on Preventive Dentistry and Patient Education. RDA Exam prep questions with detailed explanations.

RDA Radiation Safety, Protection, and Physics

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RDA Radiographic Techniques and Errors

RDA Test Online for Radiographic Techniques and Errors. Free practice with instant results and feedback.

RDA Recognition and Management of Medical ...

RDA Study Material on Recognition and Management of Medical Emergencies. Prepare effectively with real exam-style questions.

RDA Restorative and Impression Materials

Free RDA Test covering Restorative and Impression Materials. Practice and track your RDA exam readiness.

RDA Skills and Personal Attributes

RDA Exam Questions covering Skills and Personal Attributes. Master RDA Test concepts for certification prep.

RDA State Dental Practice Act and Legal/Et...

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RDA Training and Credentialing Process

RDA Mock Exam on Training and Credentialing Process. RDA Study Guide questions to pass on your first try.

RDA Work Environment and Conditions

RDA Test Prep for Work Environment and Conditions. Practice RDA Quiz questions and boost your score.

Focus heavily on Infection Control and Law and Ethics. These are critical pass/fail components in almost every state's RDA Exam requirements.

RDA CERTIFICATION TEST

RDA Score Calculator

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Excluding tuition, expect to spend around $500 to $800 on application and testing fees to obtain your RDA Certification. Financial aid is often available for accredited programs.

Rda Exam - Registered Dental Assistant study guide

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RDA Career Specialties

Explore different paths for a Registered Dental Assistant.

🧸

Pediatric RDA

Specialize in dental care for children and adolescents. Requires patience and behavior management skills.

🦷

Orthodontic RDA

Assist with braces and aligners. Often requires an Orthodontic Assistant Permit (OAP).

😷

Oral

Surgery RDAAssist in surgical procedures like extractions and implants. May require sedation monitoring certification.

🔬

Endodontic RDA

Focus on root canal therapy and microscopic dentistry. Requires precision and attention to detail.

🏥

General

Practice RDAProvide comprehensive care in a general dentist's office, handling a variety of procedures daily.

RDA Test Day Checklist

✓Valid Government ID
✓Exam Confirmation Email
✓Arrive 30 Mins Early
✓Leave Electronics in Car
✓Review Exam Center Rules
✓Wear Comfortable Clothes
✓Bring Clinical Attire (if Practical)
✓Hydrate & Eat Beforehand

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RDA License Renewal

📅

Renewal Period Every

2 Years

📚

CE Hours

25 Hours

💳

Renewal Fee

~$100

Ensure your RDA License Renewal is completed on time. In states like California, specific courses in infection control and dental practice act are mandatory for every renewal cycle.

RDA: Pros and Cons

✅Pros

+rda — rDA exam preparation strengthens your knowledge across all domains
+Passing the exam proves competency to employers and clients
+Study materials and practice tests are widely available
+Exam-based credentials are portable across states and employers
+Clear exam objectives help focus your study plan effectively

❌Cons

−Exam anxiety can affect performance — practice tests help reduce it
−Registration fees are non-refundable if you miss your test date
−Limited retake opportunities may apply with waiting periods
−Exam content updates periodically — use current study materials
−Testing center availability may require advance scheduling

RDA Questions and Answers

RDA Exam Study Guide — Dental Assistant License Prep

RDA Practice Test PDF (Free Printable 2026)

About the Author

Dr. Sarah MitchellRN, MSN, PhD

Registered Nurse & Healthcare Educator

Johns Hopkins University School of Nursing

Dr. Sarah Mitchell is a board-certified registered nurse with over 15 years of clinical and academic experience. She completed her PhD in Nursing Science at Johns Hopkins University and has taught NCLEX preparation and clinical skills courses for nursing students across the United States. Her research focuses on evidence-based exam preparation strategies for healthcare certification candidates.

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