200+ Free DANB RHS Practice Questions

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Question 1

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During a digital bitewing appointment, the assistant reviews setup before exposure. Which action BEST supports selecting the correct intraoral image type?

Choose the image type based only on operator preference regardless of findings.

Always capture a full-mouth series even when a focused image is indicated.

Skip indication review if a prior radiograph exists in the chart.

Use clinical indication and selection criteria to match the image type to the diagnostic question.

to track

2026 Statistics

Key Facts: DANB RHS Exam

Total Questions

DANB RHS outline

60 min

Exam Time

DANB RHS outline

50/25/25

Domain Weights

DANB RHS outline (2025)

Digital only

Imaging Scope

DANB RHS outline

$270 / $265

Exam Fee

DANB RHS 2026 application packet

381,900

Dental Assistant Jobs (2024)

BLS OOH

DANB's RHS outline (effective March 2025) lists 75 questions in 60 minutes: Purpose and Technique (50%), Radiation Characteristics/Protection (25%), and Infection Prevention/Control (25%). RHS is digital-radiography only since July 2022. Exam fee is $270 ($265 active military).

Sample DANB RHS Practice Questions

Try these sample questions to test your DANB RHS exam readiness. Each question includes a detailed explanation. Start the interactive quiz above for the full 200+ question experience with AI tutoring.

1During a digital bitewing appointment, the assistant reviews setup before exposure. Which action BEST supports selecting the correct intraoral image type?

A.Choose the image type based only on operator preference regardless of findings.

B.Always capture a full-mouth series even when a focused image is indicated.

C.Skip indication review if a prior radiograph exists in the chart.

D.Use clinical indication and selection criteria to match the image type to the diagnostic question.

Explanation: RHS emphasizes purpose-driven imaging. The radiographic view should match the clinical question and minimize unnecessary exposure.

2During a new-patient FMX series, positioning is challenging. What is the BEST first correction for repeated overlapped contacts on bitewings?

A.Move the receptor apically and keep the same angulation.

B.Use a smaller receptor and keep the PID position unchanged.

C.Adjust horizontal angulation so the central ray passes through contact areas.

D.Increase exposure time without changing beam alignment.

Explanation: Overlapping contacts are typically a horizontal angulation problem; correcting beam direction is the priority.

3During a pediatric recall visit, the patient has limited opening. Which step BEST reduces the chance of motion blur on digital images?

A.Disable beam-alignment devices to speed positioning.

B.Stabilize receptor placement and coach the patient to remain still until exposure completes.

C.Shorten post-exposure review time instead of managing movement.

D.Tilt the receptor to compensate for anticipated movement.

Explanation: Patient and receptor stability are core elements of diagnostically acceptable image acquisition.

4During a restorative pre-op image set, contacts are repeatedly overlapped. A cone cut appears on the image. Which correction is MOST appropriate?

A.Re-center the PID so the beam fully covers the receptor area.

B.Increase kVp while keeping the same PID position.

C.Reduce mA to limit receptor clipping.

D.Rotate the image in software to remove the cone cut.

Explanation: Cone cuts occur when the beam is not centered over the receptor; PID alignment must be corrected.

5During a periodontal maintenance visit, the team must minimize retakes. Which practice BEST supports legal radiographic documentation?

A.Store images without chart notes because the image alone is sufficient.

B.Delete nondiagnostic images without recording retake reason.

C.Transfer images verbally to referral offices without maintaining records.

D.Record image type, date, findings context, and retention/transfer details per policy.

Explanation: RHS includes legal responsibilities such as retention, transfer, ownership, and complete charting of imaging activity.

6During a limited emergency exam, the patient is anxious about x-rays. When an image is underexposed, what is the BEST troubleshooting approach?

A.Only increase monitor brightness and file the image as diagnostic.

B.Repeat the image with identical settings and positioning.

C.Verify exposure factors and receptor placement, then retake using corrected technique.

D.Accept the image if anatomy is partially visible to avoid any retake.

Explanation: Underexposure should be addressed by correcting technique factors and positioning before retake.

7During a panoramic retake request, the assistant sees inconsistent image density. Which positioning principle BEST supports a diagnostically acceptable panoramic image?

A.Ask the patient to look down to reduce cervical spine superimposition.

B.Align the patient according to unit landmarks to keep arches in the focal trough.

C.Prioritize speed by skipping head-position verification.

D.Have the patient bite off-center to expose posterior contacts better.

Explanation: Panoramic quality depends heavily on correct patient positioning within the focal trough.

8During a hygiene exam, a receptor placement error is discovered before exposure. Which action BEST addresses recurrent elongation/foreshortening errors?

A.Correct vertical angulation and receptor alignment before repeating exposure.

B.Increase mA while preserving the same geometry.

C.Switch to random receptor orientation for trial-and-error correction.

D.Retake immediately without identifying the geometric cause.

Explanation: Vertical distortion is primarily a geometry issue, not an output setting issue.

9During a crown-seat follow-up, a prior image is not diagnostically acceptable. A patient asks why the office removes earrings and glasses before imaging. What is the BEST response?

A.Metal objects only interfere with conventional film, not digital imaging.

B.The step is optional and done only for cosmetic reasons.

C.Removing metal objects is required only for cephalometric imaging.

D.Metal objects can create artifacts that obscure anatomy and reduce diagnostic quality.

Explanation: Foreign objects can produce artifacts in digital images and should be removed when possible.

10During a CBCT referral workflow, consent and documentation are reviewed. Which workflow BEST supports image mounting and orientation accuracy?

A.Rely on memory for left-right orientation instead of markers.

B.Store images before confirming maxillary/mandibular positioning.

C.Verify orientation markers and anatomical sequence before final chart storage.

D.Sort images by exposure time only and ignore anatomical order.

Explanation: Correct orientation and sequence are required for safe interpretation and continuity of care.

About the DANB RHS Exam

The DANB Radiation Health and Safety (RHS) exam is a national dental-radiography component exam used in DANB certification pathways and recognized by many state dental boards.

Questions

75 scored questions

Time Limit

60 minutes

Passing Score

Pass/Fail (DANB criterion standard)

Exam Fee

$270 traditional / $265 active military (DANB / Pearson VUE)

DANB RHS Exam Content Outline

50%

Purpose and Technique

Image purpose and selection, positioning, receptor/beam alignment, digital quality standards, and error correction

25%

Radiation Characteristics and Protection

X-ray production factors, biology/measurement units, ALARA, shielding/collimation, and exposure reduction

25%

Infection Prevention and Control

CDC/OSHA-aligned standard precautions, PPE workflow, barrier use, and radiography operatory disinfection

How to Pass the DANB RHS Exam

What You Need to Know

Passing score: Pass/Fail (DANB criterion standard)
Exam length: 75 questions
Time limit: 60 minutes
Exam fee: $270 traditional / $265 active military

Keys to Passing

Complete 500+ practice questions
Score 80%+ consistently before scheduling
Focus on highest-weighted sections
Use our AI tutor for tough concepts

DANB RHS Study Tips from Top Performers

1Prioritize Purpose/Technique first since it is half of the exam blueprint

2Practice retake-reduction logic: receptor placement, angulation, beam alignment, and patient stabilization

3Memorize ALARA applications and when shielding/collimation/position-distance controls are used

4Use digital-image troubleshooting drills (overlap, cone cuts, foreshortening, elongation, motion artifact)

5Run timed 25-question blocks to build 60-minute pacing confidence

Frequently Asked Questions

How many questions are on the DANB RHS exam?

DANB's RHS exam outline lists 75 multiple-choice questions with a 60-minute testing window.

What domains are tested on DANB RHS?

DANB lists 3 weighted domains: Purpose and Technique (50%), Radiation Characteristics and Protection (25%), and Infection Prevention and Control (25%).

Is DANB RHS still testing film radiography?

No. DANB states RHS has tested digital radiography only since July 7, 2022; film-based concepts are no longer tested.

Can I take DANB RHS online?

Yes. DANB indicates RHS can be taken in person through Pearson VUE and is also available through remote online proctoring.

How much is the DANB RHS exam fee in 2026?

The 2026 RHS application packet lists $270 for traditional applicants and $265 for active military personnel.

Do I need prerequisites to sit for RHS?

DANB's RHS exam outline states there are no eligibility requirements to take the RHS exam.