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DANB Radiation Health and Safety (RHS) Examination

DANB RHS Practice Test

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Questions updated at Sep 5, 2026, 10:36 PM CDT

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Today's 10 DANB RHS questions

Use this DANB RHS practice test to review DANB Radiation Health and Safety RHS Examination. Questions rotate daily and each answer links back to the source used to write it.

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Question 1 of 10
Objective Specific exam blueprint requirement: x-ray production factors: kVp, mA and exposure time — Concept: x-ray production factors: kVp, mA and exposure time (Item 101) II. Radiation Characteristics and Protection

For a dental radiographic examination (Q101), how should exposure factors be selected?

Concept tested:
Question 2 of 10
Objective Specific exam blueprint requirement: CDC/OSHA/ADA infection-prevention expectations during digital radiography — Concept: CDC/OSHA/ADA infection-prevention expectations during digital radiography (Item 166) III. Infection Prevention and Control

As a dental assistant evaluating the digital radiography protocols at a busy outpatient clinic, you observe a dental assistant routinely wiping down the digital detector with a dry cloth between each patient examination. The clinic has recently experienced an uptick in reported skin infections among patients. Which of the following actions should you recommend to the clinic manager to improve infection control practices, aligning with CDC/OSHA/ADA guidelines?

Concept tested:
Question 3 of 10
Objective Specific exam blueprint requirement: clinical contact surface management — Concept: clinical contact surface management (Item 161) III. Infection Prevention and Control

As a dental assistant conducting a routine audit of a mobile radiography unit, you observe the dental assistant routinely wiping down the patient examination table with a single disinfectant wipe after each procedure. The wipe is visibly soiled but not discarded; it’s used for multiple tables throughout the day. According to DANB Radiation Health and Safety (RHS) guidelines, what is the MOST appropriate action to ensure compliance with infection prevention protocols?

Concept tested:
Question 4 of 10
Objective Specific exam blueprint requirement: technique modifications for anatomical/clinical variations — Concept: technique modifications for anatomical/clinical variations (Item 86) I. Purpose and Technique

During a dental radiography procedure (Q086), which action best satisfies the stated RHS objective?

Concept tested:
Question 5 of 10
Objective Specific exam blueprint requirement: standard precautions for radiographic equipment — Concept: standard precautions for radiographic equipment (Item 159) III. Infection Prevention and Control

As a dental assistant reviewing the radiographic procedures at a busy imaging center, you observe a dental assistant routinely wiping down the patient table with a standard disinfectant wipe between each examination. The dental assistant states this is sufficient for infection control. Which of the following actions should you take, based on DANB Radiation Health and Safety guidelines?

Concept tested:
Question 6 of 10
Objective Specific exam blueprint requirement: cell/tissue radiosensitivity — Concept: cell/tissue radiosensitivity (Item 117) II. Radiation Characteristics and Protection

As a dental assistant reviewing the operational procedures for a new pediatric dental radiography, you note that the radiologist has specified a higher tube current setting than typically used for adult examinations. You understand that rapidly dividing cells are generally more radiosensitive. Which of the following actions is MOST appropriate to ensure patient safety and regulatory compliance?

Concept tested:
Question 7 of 10
Objective Specific exam blueprint requirement: barrier, position and distance — Concept: barrier, position and distance (Item 121) II. Radiation Characteristics and Protection

During an intraoral exposure (Q121), which work practice best reduces occupational dose?

Concept tested:
Question 8 of 10
Objective Specific exam blueprint requirement: ALARA — Concept: ALARA (Item 122) II. Radiation Characteristics and Protection

A patient needs dental imaging (Q122). Which action best applies radiation protection principles?

Concept tested:
Question 9 of 10
Objective Specific exam blueprint requirement: paralleling, bisecting-angle and panoramic techniques — Concept: paralleling, bisecting-angle and panoramic techniques (Item 59) I. Purpose and Technique

As a dental assistant reviewing radiographic protocols at a busy imaging center, you observe a dental assistant routinely using a panoramic technique for evaluating a patient’s complete mandible. The dental assistant states they prefer this method due to its perceived efficiency. You review the center's quality assurance records and note a slight increase in repeat exposures over the past quarter. Which of the following actions is MOST appropriate?

Concept tested:
Question 10 of 10
Objective Specific exam blueprint requirement: occupational dose concepts — Concept: occupational dose concepts (Item 146) II. Radiation Characteristics and Protection

During an intraoral exposure (Q146), which work practice best reduces occupational dose?

Concept tested:
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The free daily DANB RHS set includes crawlable question text, answer choices, correct answer labels, objective mapping, and source links. Only the first SEO card includes answer explanations and any extra learning features. Pro-only bank questions stay locked; this section mirrors only the 10 free daily questions already shown on this page.

Question 1 For a dental radiographic examination (Q101), how should exposure factors be selected?

Answer choices

  1. A. Use the highest available factors to prevent every possible retake. This would not correct the stated dental-radiography problem and could add avoidable error or exposure.
  2. B. Use one fixed technique for every patient and receptor type.
  3. C. Use patient- and receptor-appropriate settings that produce a diagnostic image without increasing kVp, mA, or time beyond clinical need.
  4. D. Increase exposure time whenever positioning is difficult.

Correct answer

Use patient- and receptor-appropriate settings that produce a diagnostic image without increasing kVp, mA, or time beyond clinical need.

Use patient- and receptor-appropriate settings that produce a diagnostic image without increasing kVp, mA, or time beyond clinical need. This keeps the item within DANB RHS dental-radiography scope and avoids unsupported medical-radiology or regulatory claims.

Wrong-answer review

  • A. Use the highest available factors to prevent every possible retake. This would not correct the stated dental-radiography problem and could add avoidable error or exposure.: Incorrect. This response does not correctly address the dental-radiography technique, safety, patient-management, or infection-control issue.
  • B. Use one fixed technique for every patient and receptor type.: Incorrect. This response does not correctly address the dental-radiography technique, safety, patient-management, or infection-control issue.
  • D. Increase exposure time whenever positioning is difficult.: Incorrect. This response does not correctly address the dental-radiography technique, safety, patient-management, or infection-control issue.

Extra learning features

Why this matters

Exposure-factor knowledge lets the assistant achieve diagnostic images while controlling unnecessary patient dose. On the RHS exam, this separates justified, optimized technique from choices that add avoidable dose or misunderstand radiation physics. In practice, the same reasoning protects patients and oral healthcare workers while preserving diagnostic image quality.

Objective/domain: II. Radiation Characteristics and Protection

Source: DANB RHS official resources and authoritative dental-radiography guidance

Question 2 As a dental assistant evaluating the digital radiography protocols at a busy outpatient clinic, you observe a dental assistant routinely wiping down the digital detector with a dry cloth between each patient examination. The clinic has recently experienced an uptick in reported skin infections among patients. Which of the following actions should you recommend to the clinic manager to improve infection control practices, aligning with CDC/OSHA/ADA guidelines?

Answer choices

  1. A. Implement an alcohol-based disinfectant wipe protocol for detector cleaning between patients, ensuring adequate contact time and proper disposal of wipes.
  2. B. Advise the radiographer to continue the current practice, as dry wiping effectively removes dust and debris, minimizing potential contamination. while following est
  3. C. Recommend the clinic purchase disposable detector covers to be changed between each patient, reducing the need for cleaning.
  4. D. Suggest the radiographer use a mild soap and water solution for detector cleaning, followed by a thorough rinsing and drying.

Correct answer

Implement an alcohol-based disinfectant wipe protocol for detector cleaning between patients, ensuring adequate contact time and proper disposal of wipes.

Objective/domain: III. Infection Prevention and Control

Source: DANB Radiation Health and Safety (RHS) Examination — Primary Official Outline

Question 3 As a dental assistant conducting a routine audit of a mobile radiography unit, you observe the dental assistant routinely wiping down the patient examination table with a single disinfectant wipe after each procedure. The wipe is visibly soiled but not discarded; it’s used for multiple tables throughout the day. According to DANB Radiation Health and Safety (RHS) guidelines, what is the MOST appropriate action to ensure compliance with infection prevention protocols?

Answer choices

  1. A. Document the observation in the audit report and recommend a refresher training for the entire radiography team on infection control practices. under the applicable office protocol
  2. B. Issue a verbal warning to the technologist, reminding them to be more cautious with wipe usage and to avoid visible soiling.
  3. C. Immediately retrain the technologist on proper disinfection techniques, emphasizing the use of a fresh wipe for each patient encounter and documenting adherence to the protocol.
  4. D. Provide the technologist with additional disinfectant wipes and instruct them to use more wipes per patient, without further training or documentation.

Correct answer

Immediately retrain the technologist on proper disinfection techniques, emphasizing the use of a fresh wipe for each patient encounter and documenting adherence to the protocol.

Objective/domain: III. Infection Prevention and Control

Source: DANB Radiation Health and Safety (RHS) Examination — Primary Official Outline

Question 4 During a dental radiography procedure (Q086), which action best satisfies the stated RHS objective?

Answer choices

  1. A. Use general medical-radiography positioning rules instead of dental technique. This would not correct the stated dental-radiography problem and could add avoidable error or exposure.
  2. B. Increase exposure factors whenever anatomy is difficult to position.
  3. C. Use correct patient preparation, receptor positioning, beam alignment, and quality-control technique to obtain the needed diagnostic image without unnecessary retakes.
  4. D. Repeat images routinely before checking whether the first image is diagnostic.

Correct answer

Use correct patient preparation, receptor positioning, beam alignment, and quality-control technique to obtain the needed diagnostic image without unnecessary retakes.

Objective/domain: I. Purpose and Technique

Source: DANB RHS official resources and authoritative dental-radiography guidance

Question 5 As a dental assistant reviewing the radiographic procedures at a busy imaging center, you observe a dental assistant routinely wiping down the patient table with a standard disinfectant wipe between each examination. The dental assistant states this is sufficient for infection control. Which of the following actions should you take, based on DANB Radiation Health and Safety guidelines?

Answer choices

  1. A. Reinforce the radiographer's practice, as standard disinfection is adequate for patient table surfaces.
  2. B. Advise the radiographer to implement a dedicated barrier, such as disposable covers, for the patient table between examinations.
  3. C. Recommend the radiographer utilize a sporicidal disinfectant, given the potential for resistant organisms on the patient table. under the applicable office protocol
  4. D. Suggest the radiographer increase the frequency of disinfection to every other examination to minimize potential exposure.

Correct answer

Advise the radiographer to implement a dedicated barrier, such as disposable covers, for the patient table between examinations.

Objective/domain: III. Infection Prevention and Control

Source: DANB Radiation Health and Safety (RHS) Examination — Primary Official Outline

Question 6 As a dental assistant reviewing the operational procedures for a new pediatric dental radiography, you note that the radiologist has specified a higher tube current setting than typically used for adult examinations. You understand that rapidly dividing cells are generally more radiosensitive. Which of the following actions is MOST appropriate to ensure patient safety and regulatory compliance?

Answer choices

  1. A. Accept the radiologist's protocol as it is, as they are responsible for clinical decisions and image quality.
  2. B. Immediately halt all pediatric CT scans using this protocol until the radiologist provides written justification for the increased tube current. under the applicable office protocol
  3. C. Inform the radiology department manager that the radiologist should adjust the protocol to standard adult settings without further discussion.
  4. D. Consult with the radiologist to discuss the necessity of the higher tube current and explore alternative imaging techniques or dose reduction strategies, documenting the discussion.

Correct answer

Consult with the radiologist to discuss the necessity of the higher tube current and explore alternative imaging techniques or dose reduction strategies, documenting the discussion.

Objective/domain: II. Radiation Characteristics and Protection

Source: DANB Radiation Health and Safety (RHS) Examination — Primary Official Outline

Question 7 During an intraoral exposure (Q121), which work practice best reduces occupational dose?

Answer choices

  1. A. Use shielding when available, maximize distance, and remain out of the path of the primary beam.
  2. B. Hold the receptor in the patient's mouth during exposure.
  3. C. Stand directly behind the PID during exposure.
  4. D. Remain close to the patient so the operator blocks scatter. This would not correct the stated dental-radiography problem and could add avoidable error or exposure.

Correct answer

Use shielding when available, maximize distance, and remain out of the path of the primary beam.

Objective/domain: II. Radiation Characteristics and Protection

Source: DANB RHS official resources and authoritative dental-radiography guidance

Question 8 A patient needs dental imaging (Q122). Which action best applies radiation protection principles?

Answer choices

  1. A. Use the same image series and settings for every patient. This would not correct the stated dental-radiography problem and could add avoidable error or exposure.
  2. B. Take duplicate images routinely to avoid missing disease.
  3. C. Use patient-specific justification and optimized technique to obtain the needed diagnostic information with no unnecessary exposure.
  4. D. Increase exposure factors whenever the patient is young.

Correct answer

Use patient-specific justification and optimized technique to obtain the needed diagnostic information with no unnecessary exposure.

Objective/domain: II. Radiation Characteristics and Protection

Source: DANB RHS official resources and authoritative dental-radiography guidance

Question 9 As a dental assistant reviewing radiographic protocols at a busy imaging center, you observe a dental assistant routinely using a panoramic technique for evaluating a patient’s complete mandible. The dental assistant states they prefer this method due to its perceived efficiency. You review the center's quality assurance records and note a slight increase in repeat exposures over the past quarter. Which of the following actions is MOST appropriate?

Answer choices

  1. A. Provide the radiographer with a refresher training module on the indications and limitations of panoramic imaging, emphasizing the potential for magnification and distortion.
  2. B. Immediately prohibit the use of panoramic imaging for mandibular surveys, mandating a switch to bisecting-angle technique to ensure optimal image quality.
  3. C. Document the radiographer's preference, noting the potential for increased repeat exposures, and proceed with the audit without further intervention.
  4. D. Reinforce the radiographer’s technique, but mandate a review of collimation practices and image processing to minimize patient dose and reduce repeat exposures.

Correct answer

Reinforce the radiographer’s technique, but mandate a review of collimation practices and image processing to minimize patient dose and reduce repeat exposures.

Objective/domain: I. Purpose and Technique

Source: DANB Radiation Health and Safety (RHS) Examination — Primary Official Outline

Question 10 During an intraoral exposure (Q146), which work practice best reduces occupational dose?

Answer choices

  1. A. Use shielding when available, maximize distance, and remain out of the path of the primary beam.
  2. B. Hold the receptor in the patient's mouth during exposure.
  3. C. Stand directly behind the PID during exposure.
  4. D. Remain close to the patient so the operator blocks scatter. This would not correct the stated dental-radiography problem and could add avoidable error or exposure.

Correct answer

Use shielding when available, maximize distance, and remain out of the path of the primary beam.

Objective/domain: II. Radiation Characteristics and Protection

Source: DANB RHS official resources and authoritative dental-radiography guidance

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