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DANB RHS Review Exam Questions with Correct Answers Personnel monitoring for radiation exposure is done by A. observing physical changes over time B. documenting the number of exposures C. wearing a dosimeter D. reporting exposures to the state - Answer-C During radiographic exposures, semi...

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  • August 19, 2024
  • 35
  • 2024/2025
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DANB RHS Review Exam
Questions with Correct
Answers
Personnel monitoring for radiation exposure is done by
A. observing physical changes over time
B. documenting the number of exposures
C. wearing a dosimeter
D. reporting exposures to the state - Answer-C

During radiographic exposures, semi-critical items that must be sterilized or disposed of
include
A. PID
B. tubehead
C. film holding devices
D. exposure buttons - Answer-C

Which of the following is a DISADVANTAGE of panoramic radiographs?
A. More radiation exposure
B. Higher cost of equipment
C. Less radiation exposure
D. Lower cost of equipment - Answer-B

Which of the following helps to decrease exposure of the thyroid gland from the primary
radiation beam?
A. Decreasing the x-ray focal plane
B. Bisecting angle technique
C. Paralleling technique
D. Use of round collimation - Answer-C

The purpose of intensifying screen is too
A. increase the amount of radiation
B. decrease the effect of the radiation exposure
C. decrease the amount of radiation exposure
D. increase the effect of the radiation - Answer-C

Which of the following injury theories describes cells that are damaged by way of
absorption?
A. Indirect
B. Dose-Responsive

,C. Direct
D. Latent - Answer-A

During patient exposure, protection from radiation for the dental assistant includes
A. using an activator button with a long cord
D. standing 4 feet from the source of radiation
C. wearing protective clothing
D. standing behind a wall - Answer-D

Which of the following radiation effects increase in severity as more radiation is
absorbed by somatic cells?
A. Nonstochastic
B. Stochastic
C. Long term
D. Cumulative - Answer-A

Which of the following extraoral radiographs is used to evaluate impacted teeth, large
lesions and fractures of the mandible?
A. Waters projection
B. Reverse Towne projection
C. Posteroanterior projection
D. Lateral jaw projection - Answer-D

Cells most susceptible to radiation damage are
A. muscle
B. mature bone
C. nerve
D. bone marrow - Answer-D

While exposing x-ray films, radiation deflecting off the patient's head is called
A. background radiation
B. primary radiation
C. scatter radiation
D. characteristic radiation - Answer-C

Which of the following is the measurement of force that refers to the potential difference
between two electrical charges?
A. Voltage
B. Contrast
C. Amperage
D. Density - Answer-A

Before exposing radiographs on a minor, the dental assistant should
A. obtain consent from the patient
B. explain radiographs are mandatory for all patients
C. obtain consent from the parent or legal guardian

,D. explain that radiographs are required by insurance - Answer-C

Compared to a dentulous patient, radiographic exposure time on an edentulous adult
patient should
A. remain unchanged
B. be doubled
C. increase
D. decrease - Answer-D

Maximum wattage for a safelight bulb should be
A. 7
B. 60
C. 15
D. 30 - Answer-C

The penetrating x-ray beam produced during dental radiography is called
A. scatter radiation
B. characteristic radiation
C. secondary radiation
D. primary radiation - Answer-D

Which of the following conditions will result in radiographic image that is too light?
A. processing solutions
B. Contaminated fixer solution
C. Weak developing solution
D. Darkroom door opened during development - Answer-C

When mounting periapical radiographs, what info helps to distinguish maxillary molar
radiographs from mandibular molar radiographs
A. Maxillary molars have two roots
B. Mandibular molars are larger
C. Mandibular second molar has one root
D. Maxillary sinus outline is visible - Answer-D

The most common artificial radiation exposure comes from
A. medical radiation
B. consumer products
C. the nuclear fuel cycle
D. atomic weapon fallout - Answer-A

If there are no teeth to serve as guides, which of the following landmarks indicates a
maxillary molar area on radiograph
A. Mental foramen
B. Tuberosity
C. Incisive foramen
D. Internal oblique ridge - Answer-B

, Added filtration in the x-ray tube head protects the
A. operator
B. patient
C. environment
D. dentist - Answer-B

The most commonly used radiographic exposure for a 3 year old patient is
A. periapical
B. panoramic
C. bitewing
D. cephalometric - Answer-C

Duplicating film is coated with
A. one-sided polyester base
B. two-sided polyester base
C. two-sided emulsion
D. one-sided emulsion - Answer-D

The best way to correct a cone-cutting error is to adjust
A. vertical angulation
B. horizontal angulation
C. film postion
D. patient positioning - Answer-C

Which of the following will best protect the dental assistant from cross- contamination
while exposing radiographs?
A. patient bib
B. film holding devices
C. barriers on PID
D. Gloves - Answer-D

Which of the following film size is used for an occlusal exposure
A. 1
B. 3
C. 2
D. 4 - Answer-D

Which of the following landmarks is useful when mounting films of the mandibular
posterior area?
A. Lingual foramen
B. Mental foramen
C. External Oblique ridge
D. Internal Oblique rige - Answer-B

Personal radiation monitoring devices are worn to

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