DANB RHS PRACTICE EXAM 2025
QUESTIONS AND ANSWERS
Which of the following describes a double-ended film holder used for posterior and anterior
teeth? - ANS Eezee-Grip®
When exposing a panoramic radiograph on an edentulous patient, which of the following would
a dental assistant use to stabilize the upper and lower arch on the bite block? - ANS Cotton
rolls
How frequently should processing solutions be replenished? - ANS Daily
Bitetabs placed on film for use during bitewing radiographs should be positioned on the -
ANS white unprinted side of the packet.
Which of the following is a long-term effect of radiation? - ANS Genetic defects
Which of the following causes the interproximal areas of the teeth to appear overlapped? -
ANS Improper horizontal angulation
Human tissue are mainly composed of - ANS water/H2O.
Which of the following can help to protect patients from excess radiation damage to tissues? -
1
Page
ANS High kVp
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, After a patient has been dismissed, dental unit surfaces and counter tops that may have been
contaminated should be cleaned with an EPA-registered - ANS intermediate- level
disinfectant.
Added filtration in the x-ray tubehead protects the - ANS patient.
Which of the following may cause unnecessary radiation exposure to the patient? -
ANS Radiograph technique errors
How often should protective clothing be changed in an oral healthcare setting? - ANS When
visibly soiled
Compared to the paralleling technique a DISADVANTAGE of the bisecting angle technique is -
ANS image distortion.
Which of the following affects the quantity of x-rays being emitted from the tubehead? -
ANS mA
Which of the following results in a double image radiograph? - ANS Exposing the same film
twice
Which of the following will best protect the dental assistant from cross-contamination while
exposing radiographs? - ANS Gloves
The penetrating x-ray beam produced during dental radiography is called - ANS primary
radiation.
All of the following can be used for handling film in the daylight loader EXCEPT - ANS utility
2
gloves.
Page
@COPYRIGHT SIRJOEL 2025/2026
, The most common radiographic exposure used to detect periodontal disease is a/an -
ANS periapical.
Which of the following radiographic errors is caused by removing a film too quickly from a
tightly packed box? - ANS Static electricity
Dental healthcare personnel can BEST shield themselves from radiation during patient exposure
by standing behind - ANS a drywall barrier.
In dental radiography, the purpose of the fixer solution is to - ANS remove unexposed silver
halide crystals.
Which of the following is the most effective method of reducing patient exposure to x-
radiation? - ANS Fast film
A full mouth series of periapical radiographs taken on an edentulous patient will consist of -
ANS six anterior and eight posterior.
Which of the following is most likely to cause a stored radiograph to turn brown over time? -
ANS Underwashing
When mounting periapical radiographs, what information helps to distinguish maxillary molar
radiographs from mandibular molar radiographs? - ANS The maxillary sinus outline is visible.
Maximum wattage for a safelight bulb should be - ANS 15
Which of the following landmarks are located by the midline of the mandible? - ANS Genial
tubercles
3
Page
@COPYRIGHT SIRJOEL 2025/2026
, Which of the following radiation injury theories describes cells that are damaged by way of
absorption? - ANS Indirect
Cone beam computed tomography uses - ANS 3-dimensional technology.
Film should be stored in - ANS its original lead-wrapped packaging.
A panoramic radiograph with a dark shadow over the apices of the maxillary teeth may be
caused by the patient - ANS not placing the tongue against the palate.
A radiograph will automatically be retaken when there is a - ANS double exposure.
When radiographs are mounted with the embossed dot appearing outward, this is known as -
ANS facial mounting.
Storing unexposed radiographic film in high humidity conditions may cause - ANS film fog.
Compared to a dentulous patient, radiographic exposure time on an edentulous adult patient
should - ANS decrease.
Which of the following radiolucent landmarks is useful when mounting films in the mandibular
anterior area? - ANS Lingual foramen
The primary function of collimation is to - ANS restrict the size of the beam.
Which of the following may cause film fogging? - ANS Using expired film
4
Most bilateral findings in radiographs are considered - ANS normal anatomic landmarks.
Page
@COPYRIGHT SIRJOEL 2025/2026
QUESTIONS AND ANSWERS
Which of the following describes a double-ended film holder used for posterior and anterior
teeth? - ANS Eezee-Grip®
When exposing a panoramic radiograph on an edentulous patient, which of the following would
a dental assistant use to stabilize the upper and lower arch on the bite block? - ANS Cotton
rolls
How frequently should processing solutions be replenished? - ANS Daily
Bitetabs placed on film for use during bitewing radiographs should be positioned on the -
ANS white unprinted side of the packet.
Which of the following is a long-term effect of radiation? - ANS Genetic defects
Which of the following causes the interproximal areas of the teeth to appear overlapped? -
ANS Improper horizontal angulation
Human tissue are mainly composed of - ANS water/H2O.
Which of the following can help to protect patients from excess radiation damage to tissues? -
1
Page
ANS High kVp
@COPYRIGHT SIRJOEL 2025/2026
, After a patient has been dismissed, dental unit surfaces and counter tops that may have been
contaminated should be cleaned with an EPA-registered - ANS intermediate- level
disinfectant.
Added filtration in the x-ray tubehead protects the - ANS patient.
Which of the following may cause unnecessary radiation exposure to the patient? -
ANS Radiograph technique errors
How often should protective clothing be changed in an oral healthcare setting? - ANS When
visibly soiled
Compared to the paralleling technique a DISADVANTAGE of the bisecting angle technique is -
ANS image distortion.
Which of the following affects the quantity of x-rays being emitted from the tubehead? -
ANS mA
Which of the following results in a double image radiograph? - ANS Exposing the same film
twice
Which of the following will best protect the dental assistant from cross-contamination while
exposing radiographs? - ANS Gloves
The penetrating x-ray beam produced during dental radiography is called - ANS primary
radiation.
All of the following can be used for handling film in the daylight loader EXCEPT - ANS utility
2
gloves.
Page
@COPYRIGHT SIRJOEL 2025/2026
, The most common radiographic exposure used to detect periodontal disease is a/an -
ANS periapical.
Which of the following radiographic errors is caused by removing a film too quickly from a
tightly packed box? - ANS Static electricity
Dental healthcare personnel can BEST shield themselves from radiation during patient exposure
by standing behind - ANS a drywall barrier.
In dental radiography, the purpose of the fixer solution is to - ANS remove unexposed silver
halide crystals.
Which of the following is the most effective method of reducing patient exposure to x-
radiation? - ANS Fast film
A full mouth series of periapical radiographs taken on an edentulous patient will consist of -
ANS six anterior and eight posterior.
Which of the following is most likely to cause a stored radiograph to turn brown over time? -
ANS Underwashing
When mounting periapical radiographs, what information helps to distinguish maxillary molar
radiographs from mandibular molar radiographs? - ANS The maxillary sinus outline is visible.
Maximum wattage for a safelight bulb should be - ANS 15
Which of the following landmarks are located by the midline of the mandible? - ANS Genial
tubercles
3
Page
@COPYRIGHT SIRJOEL 2025/2026
, Which of the following radiation injury theories describes cells that are damaged by way of
absorption? - ANS Indirect
Cone beam computed tomography uses - ANS 3-dimensional technology.
Film should be stored in - ANS its original lead-wrapped packaging.
A panoramic radiograph with a dark shadow over the apices of the maxillary teeth may be
caused by the patient - ANS not placing the tongue against the palate.
A radiograph will automatically be retaken when there is a - ANS double exposure.
When radiographs are mounted with the embossed dot appearing outward, this is known as -
ANS facial mounting.
Storing unexposed radiographic film in high humidity conditions may cause - ANS film fog.
Compared to a dentulous patient, radiographic exposure time on an edentulous adult patient
should - ANS decrease.
Which of the following radiolucent landmarks is useful when mounting films in the mandibular
anterior area? - ANS Lingual foramen
The primary function of collimation is to - ANS restrict the size of the beam.
Which of the following may cause film fogging? - ANS Using expired film
4
Most bilateral findings in radiographs are considered - ANS normal anatomic landmarks.
Page
@COPYRIGHT SIRJOEL 2025/2026
