DANB RHS EXAM 2025 QUESTIONS AND
ANSWERS
What structure would appear radiopaque on a dental radiograph - ANS bone
the maximum annual permissible dose (MPD) of ionizing radiation for the public is - ANS 0.5
REM/year
when exposing radiographs on an endentulous patient, compared to a dentulous patient, the
exposure time should - ANS be reduced
to reduce cross-contamination during dental radiography the CDC recommends that dental
radiography operators do all except the following - ANS take complete medical histories
which of the following should be included in a quality assurance policy for dental radiographs -
ANS a plan for corrective action
which of the following are common parts of a dental x-ray machine - ANS control panel,
extension arm, tubehead
ionization occurs when an xray strikes an atom and the atom - ANS loses an electron
1
Page
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, which of the following anatomical landmarks is not normally seen on intraoral radiographs -
ANS frontal sinus
the paralleling technique is recommended for - ANS bitewings
contrast in a radiograph is primarily controlled by - ANS KVP
which film would be exposed to see increased coverage of the alveolar bone - ANS vertical
bitewing
which of the following affects the speed of the electrons emitted from the tubehead -
ANS KVP
if there are no teeth to serve as guidelines, which of the following landmarks indicates a
maxillary molar area radiograph - ANS tuberosity
for x-ray machines operating in ranges at or below 70kvp, the total aluminum equivalent,
filtration must be a minimum of - ANS 1.5mm
the purpose of a grid device on an extraoral cassette is to - ANS reduce scatter radiation
reaching the film
which of the following equations is used to determine the occupational max accumulated dose
(MAD) of radiation - ANS age minus 18 times 5REMS/year
which of the following cells exposed to radiation may be associated with leukemia -
ANS somatic
2
leakage radiation is defined as any radiation that - ANS escapes through the shielding of an x-
Page
ray tube housing
@COPYRIGHT SIRJOEL 2025/2026
ANSWERS
What structure would appear radiopaque on a dental radiograph - ANS bone
the maximum annual permissible dose (MPD) of ionizing radiation for the public is - ANS 0.5
REM/year
when exposing radiographs on an endentulous patient, compared to a dentulous patient, the
exposure time should - ANS be reduced
to reduce cross-contamination during dental radiography the CDC recommends that dental
radiography operators do all except the following - ANS take complete medical histories
which of the following should be included in a quality assurance policy for dental radiographs -
ANS a plan for corrective action
which of the following are common parts of a dental x-ray machine - ANS control panel,
extension arm, tubehead
ionization occurs when an xray strikes an atom and the atom - ANS loses an electron
1
Page
@COPYRIGHT SIRJOEL 2025/2026
, which of the following anatomical landmarks is not normally seen on intraoral radiographs -
ANS frontal sinus
the paralleling technique is recommended for - ANS bitewings
contrast in a radiograph is primarily controlled by - ANS KVP
which film would be exposed to see increased coverage of the alveolar bone - ANS vertical
bitewing
which of the following affects the speed of the electrons emitted from the tubehead -
ANS KVP
if there are no teeth to serve as guidelines, which of the following landmarks indicates a
maxillary molar area radiograph - ANS tuberosity
for x-ray machines operating in ranges at or below 70kvp, the total aluminum equivalent,
filtration must be a minimum of - ANS 1.5mm
the purpose of a grid device on an extraoral cassette is to - ANS reduce scatter radiation
reaching the film
which of the following equations is used to determine the occupational max accumulated dose
(MAD) of radiation - ANS age minus 18 times 5REMS/year
which of the following cells exposed to radiation may be associated with leukemia -
ANS somatic
2
leakage radiation is defined as any radiation that - ANS escapes through the shielding of an x-
Page
ray tube housing
@COPYRIGHT SIRJOEL 2025/2026
