Demonstrate your competency in dental radiography safety, techniques, and infection control to earn your DANB RHS credential.
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The DANB Radiation Health and Safety (RHS) exam is a nationally recognized certification administered by the Dental Assisting National Board. It evaluates dental assistants on their ability to safely expose, process, and evaluate dental radiographs while following proper radiation protection protocols. The computer-based exam covers radiation physics, biological effects, equipment operation, infection control, technique and quality assurance, and patient and operator safety. Passing the RHS is required in many states for dental assistants who take X-rays and is one of three component exams of the Certified Dental Assistant (CDA) credential.
The DANB RHS exam evaluates your knowledge across these areas:
Proper techniques for exposing, processing, and evaluating the quality of dental radiographic images.
Protection measures for patients, operators, and the public, including ALARA principles and shielding.
Understanding X-ray equipment components, settings, digital sensors, and quality assurance procedures.
Proper aseptic techniques, barrier use, and disinfection protocols specific to radiographic procedures.
Our question bank is built to help you master the DANB RHS exam with targeted practice and clear explanations.
Questions structured like the real DANB RHS exam, including the question styles you'll see on test day.
Know not just the right answer but why the others are wrong - so every question teaches you something.
Every domain on the DANB RHS content outline is represented across the question sets.
Build the confidence you need to walk into test day calm and prepared.
Assess your knowledge and experience the DANB RHS format before taking the actual test.
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Mix practice questions into your study from day one to find the topics that need more attention.
Revisit questions you have seen before. Spaced review locks in long-term retention.
When ready, attempt a full set in one timed sitting to build the stamina you need on test day.
Use the explanations to understand each mistake and concentrate on the weak spots.
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This Q&A set will test your knowledge about radiograph interpretation, identifying normal and abnormal landmarks, and evaluating image quality.
Start Practice →This Q&A set will test your knowledge about dental image types, including periapical, bitewing, occlusal, panoramic, and extraoral radiographs.
Start Practice →This Q&A set will test your knowledge about radiographic procedures, patient positioning, exposure techniques, and equipment operation.
Start Practice →This Q&A set will test your knowledge about radiation safety, ALARA principles, biological effects, patient and operator protection, and shielding.
Start Practice →This Q&A set will test your knowledge about infection control procedures, aseptic techniques, barrier use, and disinfection protocols for radiographic equipment.
Start Practice →The DANB RHS covers three main areas: expose and evaluate radiographs (selecting techniques, positioning, and image evaluation), radiation safety for patients and operators (ALARA, shielding, and exposure factors), and infection control procedures specific to radiographic equipment and processes.
Dental assistants who expose dental radiographs should take the RHS exam. Many states require this certification to legally take dental X-rays. It is also one of three exams needed for the full Certified Dental Assistant (CDA) credential from DANB.
Focus on radiation physics fundamentals, proper technique for periapical and bitewing radiographs, digital imaging workflows, and infection control protocols. Our DANB RHS question bank provides realistic practice with detailed explanations so you can identify weak areas before test day.
Earning your DANB Radiation Health and Safety certification demonstrates your competency in dental radiography and opens doors to expanded responsibilities in the dental office. With a strong foundation in radiation safety, technique, and infection control, you prove you are ready to provide safe, high-quality patient care.