RDA Study Guide 2026

Everything you need to pass the RDA exam in one place: the exam format, every topic to study, real practice questions with explanations, flashcards, and full-length practice tests. Free, no sign-up needed.

📋 RDA Exam Format at a Glance

150

Questions

180 min

Time Limit

75%

Passing Score

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📚 RDA Topics to Study (47)

Infection Control and Barrier Techniques · 7 cards Infection Control and Barrier Techniques · 7 cards Infection Control and Barrier Techniques · 7 cards Job Responsibilities and Duties · 7 cards Job Responsibilities and Duties · 7 cards Job Responsibilities and Duties · 7 cards Job Responsibilities and Duties · 7 cards Skills and Personal Attributes · 7 cards Skills and Personal Attributes · 7 cards Skills and Personal Attributes · 7 cards Skills and Personal Attributes · 7 cards Training and Credentialing Process · 7 cards Training and Credentialing Process · 7 cards Training and Credentialing Process · 7 cards Training and Credentialing Process · 7 cards Work Environment and Conditions · 7 cards Work Environment and Conditions · 7 cards Work Environment and Conditions · 7 cards Work Environment and Conditions · 7 cards Assisting with Administration of Anesthesia and Sedation · 6 cards Dental Charting, Tooth Morphology, and Occlusion · 6 cards Dental Instruments and Tray Setups · 6 cards Instrument Processing, Sterilization, and Monitoring · 6 cards Radiographic Techniques and Errors · 6 cards Recognition and Management of Medical Emergencies · 6 cards Restorative and Impression Materials · 6 cards State Dental Practice Act and Legal/Ethical Responsibilities · 6 cards Assisting with Administration of Anesthesia and Sedation · 6 cards Assisting with Administration of Anesthesia and Sedation · 6 cards Dental Charting, Tooth Morphology, and Occlusion · 6 cards

See all 47 topics as flashcards →

✍️ Sample RDA Questions & Answers

1. What radiographic error appears as a cone-shaped radiopaque shadow on the periapical image?

✓ Cone cutting

Cone cutting occurs when the PID (cone) is not aligned correctly and the primary beam misses part of the film/sensor, resulting in a clear (unexposed) area with a cone/circular shape.

2. Which action BEST demonstrates the RDA's commitment to continuing education?

✓ Attending dental conferences, completing CE credits, and staying current with evidence-based practices

Active pursuit of CE credits and evidence-based updates is a professional obligation and marks a committed RDA.

3. What should the RDA do FIRST if a patient develops syncope (fainting) during a procedure?

✓ Place patient in Trendelenburg (supine with feet elevated) position

For syncope, the first step is to place the patient in the Trendelenburg position (supine with feet elevated above the heart) to restore blood flow to the brain.

4. When mixing type III gypsum dental stone for a diagnostic model, what does an increased water-to-powder (W:P) ratio result in?

✓ Weaker model with decreased strength and increased porosity

Too much water (high W:P ratio) produces excess porosity as water evaporates, resulting in a weaker, softer model with poor surface detail and lower compressive strength.

5. When receiving constructive criticism from a supervising dentist, the MOST professional response is to:

✓ Listen actively, acknowledge the feedback, and apply the correction to future practice

Receiving feedback with openness and applying it reflects professionalism and a commitment to continuous improvement.

6. What is the difference between 'direct supervision' and 'general supervision' under California dental law?

✓ Direct supervision requires the dentist to be physically present in the office and personally authorize treatment; general supervision allows the RDA to perform authorized procedures without the dentist being physically present

Direct supervision requires the dentist to be physically present in the dental facility and available to oversee the procedure. General supervision allows the RDA to perform authorized procedures even when the dentist is not physically present at the time.

🎯 Free RDA Practice Tests

Training and Credentialing Process · 7 questions Work Environment and Conditions · 7 questions Job Responsibilities and Duties · 7 questions Job Responsibilities and Duties · 7 questions Job Responsibilities and Duties · 7 questions Job Responsibilities and Duties · 7 questions Work Environment and Conditions · 7 questions Work Environment and Conditions · 7 questions Work Environment and Conditions · 7 questions Training and Credentialing Process · 7 questions

📖 RDA Guides & Articles

Your RDA Study Path

1. Learn with Flashcards → 2. Drill Practice Tests → 3. Take the Full Exam Simulation

🃏 Flashcards (297)🏆 Exam Simulation