700 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 per year
When exposing radiographs on an edentulous 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 x-ray strikes an atom and the atom? - ANS loses an electron
Which of the following radiograph exposures produces a radiograph that shows the crowns of
1
Page
both the maxillary and mandibular teeth? - ANS bitewing
@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 which of the following radiograph exposures? -
ANS bitewing
Which of the following is recommended to help stabilize intraoral film when placed in the
patient's mouth? - ANS utilize a filmholder
When labeling radiographs, all the following should be included EXCEPT? - ANS patients
diagnosis
Which of the following is a result of primary, secondary and scatter radiation? -
ANS biological damage
Which of the following should you ask a patient to do before you begin exposing intraoral
radiographs? - ANS remove glasses
Contrast in a radiograph is primarily controlled by? - ANS kVp
Paralleling technique requires the film be placed? - ANS away from the tooth, toward the
middle of the oral cavity
Which film would be exposed to see increased coverage of the alveolar bone? - ANS vertical
bitewing
What is the primary advantage in using digital radiography? - ANS reduces the radiation to
patient
2
Page
@COPYRIGHT SIRJOEL 2025/2026
, Which of the following affects the speed of the electrons emitted from the tube head? -
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 70 kVp, the total aluminum equivalent
filtration must be a minimum of: - ANS 1.5 mm
On a radiograph, when the contact area of one tooth is superimposed over the contact of
another, it is called? - ANS overlapping
The purpose of a grid device on an extraoral cassette is to? - ANS reduce scatter radiation
reaching the film
The main purpose of using a lead apron with a thyroid collar when exposing dental radiographs
is to protect the patient from? - ANS scatter radiation
While exposing x-ray films, radiation deflecting off the patient's head is called? - ANS scatter
radiation
Which of the following equations is used to determine the occupational maximum accumulated
dose (MAD) of radiation? - ANS age minus 18 times 5 rems/year
Which of the following cells exposed to radiation may be associated with leukemia? -
ANS somatic
Leakage radiation is defined as any radiation that? - ANS escapes through the shielding of an
X-ray tube housing
3
Page
@COPYRIGHT SIRJOEL 2025/2026
, To help desensitize the tissue prior to film replacement, the dental assistant should? -
ANS rub a finger along the tissues where the film touches
To assist the patient in controlling the gag reflex, the dental assistant should? - ANS use a
distraction technique
When documenting a lesion found on a radiograph, all the following should be described
EXCEPT? - ANS severity
Impacted third molars are best seen with what type of radiograph? - ANS panoramic
Chemical agents should be properly disposed of according to? - ANS federal, state, and local
laws
What size film is most effective, when placed vertically in the anterior region, to evaluate caries
and periodontal health? - ANS size 2
Using the ALARA concept as a guideline for radiographs includes all the following EXCEPT? -
ANS using a circular PID
Which of following extraoral radiographs is used to evaluate impacted teeth, large lesions, and
fractures of the mandible? - ANS lateral jaw projection
When preparing to take a digital radiograph, after selecting the appropriate sensor size for the
patient the next step is to? - ANS place a barrier on the sensor
Which of the following affects the quantity of x-rays being emitted from the tube head? -
ANS mA
4
Page
The patient's records are? - ANS confidential
@COPYRIGHT SIRJOEL 2025/2026
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 per year
When exposing radiographs on an edentulous 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 x-ray strikes an atom and the atom? - ANS loses an electron
Which of the following radiograph exposures produces a radiograph that shows the crowns of
1
Page
both the maxillary and mandibular teeth? - ANS bitewing
@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 which of the following radiograph exposures? -
ANS bitewing
Which of the following is recommended to help stabilize intraoral film when placed in the
patient's mouth? - ANS utilize a filmholder
When labeling radiographs, all the following should be included EXCEPT? - ANS patients
diagnosis
Which of the following is a result of primary, secondary and scatter radiation? -
ANS biological damage
Which of the following should you ask a patient to do before you begin exposing intraoral
radiographs? - ANS remove glasses
Contrast in a radiograph is primarily controlled by? - ANS kVp
Paralleling technique requires the film be placed? - ANS away from the tooth, toward the
middle of the oral cavity
Which film would be exposed to see increased coverage of the alveolar bone? - ANS vertical
bitewing
What is the primary advantage in using digital radiography? - ANS reduces the radiation to
patient
2
Page
@COPYRIGHT SIRJOEL 2025/2026
, Which of the following affects the speed of the electrons emitted from the tube head? -
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 70 kVp, the total aluminum equivalent
filtration must be a minimum of: - ANS 1.5 mm
On a radiograph, when the contact area of one tooth is superimposed over the contact of
another, it is called? - ANS overlapping
The purpose of a grid device on an extraoral cassette is to? - ANS reduce scatter radiation
reaching the film
The main purpose of using a lead apron with a thyroid collar when exposing dental radiographs
is to protect the patient from? - ANS scatter radiation
While exposing x-ray films, radiation deflecting off the patient's head is called? - ANS scatter
radiation
Which of the following equations is used to determine the occupational maximum accumulated
dose (MAD) of radiation? - ANS age minus 18 times 5 rems/year
Which of the following cells exposed to radiation may be associated with leukemia? -
ANS somatic
Leakage radiation is defined as any radiation that? - ANS escapes through the shielding of an
X-ray tube housing
3
Page
@COPYRIGHT SIRJOEL 2025/2026
, To help desensitize the tissue prior to film replacement, the dental assistant should? -
ANS rub a finger along the tissues where the film touches
To assist the patient in controlling the gag reflex, the dental assistant should? - ANS use a
distraction technique
When documenting a lesion found on a radiograph, all the following should be described
EXCEPT? - ANS severity
Impacted third molars are best seen with what type of radiograph? - ANS panoramic
Chemical agents should be properly disposed of according to? - ANS federal, state, and local
laws
What size film is most effective, when placed vertically in the anterior region, to evaluate caries
and periodontal health? - ANS size 2
Using the ALARA concept as a guideline for radiographs includes all the following EXCEPT? -
ANS using a circular PID
Which of following extraoral radiographs is used to evaluate impacted teeth, large lesions, and
fractures of the mandible? - ANS lateral jaw projection
When preparing to take a digital radiograph, after selecting the appropriate sensor size for the
patient the next step is to? - ANS place a barrier on the sensor
Which of the following affects the quantity of x-rays being emitted from the tube head? -
ANS mA
4
Page
The patient's records are? - ANS confidential
@COPYRIGHT SIRJOEL 2025/2026
