DANB RHS STUDY QUESTIONS AND ANSWERS
What structure would appear radiopaque on a dental radiograph? - (ANSWER)bone
The Maximum Annual Permissible Dose (MPD) of ionizing radiation for the public is? - (ANSWER)0.5
REM per year
When exposing radiographs on an edentulous patient, compared to a dentulous patient, the exposure
time should? - (ANSWER)be reduced
To reduce cross-contamination during dental radiography, the CDC recommends that dental
radiography operators do all EXCEPT the following? - (ANSWER)take complete medical histories
Which of the following should be included in a quality assurance policy for dental radiographs? -
(ANSWER)a plan for corrective action
Which of the following are common parts of a dental x-ray machine? - (ANSWER)control panel,
extension arm, tubehead
Ionization occurs when an x-ray strikes an atom and the atom? - (ANSWER)loses an electron
Which of the following radiograph exposures produces a radiograph that shows the crowns of both the
maxillary and mandibular teeth? - (ANSWER)bitewing
Which of the following anatomical landmarks is NOT normally seen on intraoral radiographs? -
(ANSWER)frontal sinus
The paralleling technique is recommended for which of the following radiograph exposures? -
(ANSWER)bitewing
Which of the following is recommended to help stabilize intraoral film when placed in the patient's
mouth? - (ANSWER)utilize a filmholder
,DANB RHS STUDY QUESTIONS AND ANSWERS
When labeling radiographs, all the following should be included EXCEPT? - (ANSWER)patients diagnosis
Which of the following is a result of primary, secondary and scatter radiation? - (ANSWER)biological
damage
Which of the following should you ask a patient to do before you begin exposing intraoral radiographs? -
(ANSWER)remove glasses
Contrast in a radiograph is primarily controlled by? - (ANSWER)kVp
Paralleling technique requires the film be placed? - (ANSWER)away from the tooth, toward the middle
of the oral cavity
Which film would be exposed to see increased coverage of the alveolar bone? - (ANSWER)vertical
bitewing
What is the primary advantage in using digital radiography? - (ANSWER)reduces the radiation to patient
Which of the following affects the speed of the electrons emitted from the tube head? - (ANSWER)kVp
If there are no teeth to serve as guidelines, which of the following landmarks indicates a maxillary molar
area radiograph? - (ANSWER)tuberosity
For x-ray machines operating in ranges at or below 70 kVp, the total aluminum equivalent filtration must
be a minimum of: - (ANSWER)1.5 mm
On a radiograph, when the contact area of one tooth is superimposed over the contact of another, it is
called? - (ANSWER)overlapping
,DANB RHS STUDY QUESTIONS AND ANSWERS
The purpose of a grid device on an extraoral cassette is to? - (ANSWER)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? - (ANSWER)scatter radiation
While exposing x-ray films, radiation deflecting off the patient's head is called? - (ANSWER)scatter
radiation
Which of the following equations is used to determine the occupational maximum accumulated dose
(MAD) of radiation? - (ANSWER)age minus 18 times 5 rems/year
Which of the following cells exposed to radiation may be associated with leukemia? - (ANSWER)somatic
Leakage radiation is defined as any radiation that? - (ANSWER)escapes through the shielding of an X-ray
tube housing
To help desensitize the tissue prior to film replacement, the dental assistant should? - (ANSWER)rub a
finger along the tissues where the film touches
To assist the patient in controlling the gag reflex, the dental assistant should? - (ANSWER)use a
distraction technique
When documenting a lesion found on a radiograph, all the following should be described EXCEPT? -
(ANSWER)severity
Impacted third molars are best seen with what type of radiograph? - (ANSWER)panoramic
Chemical agents should be properly disposed of according to? - (ANSWER)federal, state, and local laws
, DANB RHS STUDY QUESTIONS AND ANSWERS
What size film is most effective, when placed vertically in the anterior region, to evaluate caries and
periodontal health? - (ANSWER)size 2
Using the ALARA concept as a guideline for radiographs includes all the following EXCEPT? -
(ANSWER)using a circular PID
Which of following extraoral radiographs is used to evaluate impacted teeth, large lesions, and fractures
of the mandible? - (ANSWER)lateral jaw projection
When preparing to take a digital radiograph, after selecting the appropriate sensor size for the patient
the next step is to? - (ANSWER)place a barrier on the sensor
Which of the following affects the quantity of x-rays being emitted from the tube head? - (ANSWER)mA
The patient's records are? - (ANSWER)confidential
The Buccal Object Rule is used to determine if a foreign body is in which direction? - (ANSWER)lingual to
buccal
Patients receive less radiation when using a? - (ANSWER)rectangular PID
Dental healthcare personnel who are pregnant can expose radiographs during the? - (ANSWER)entire
pregnancy
When using a 16-inch PID compared to an 8-inch PID the exposure time must? - (ANSWER)be increased
Light colored radiographs commonly result from? - (ANSWER)underexposure
Radiation injury results from? - (ANSWER)exposure
What structure would appear radiopaque on a dental radiograph? - (ANSWER)bone
The Maximum Annual Permissible Dose (MPD) of ionizing radiation for the public is? - (ANSWER)0.5
REM per year
When exposing radiographs on an edentulous patient, compared to a dentulous patient, the exposure
time should? - (ANSWER)be reduced
To reduce cross-contamination during dental radiography, the CDC recommends that dental
radiography operators do all EXCEPT the following? - (ANSWER)take complete medical histories
Which of the following should be included in a quality assurance policy for dental radiographs? -
(ANSWER)a plan for corrective action
Which of the following are common parts of a dental x-ray machine? - (ANSWER)control panel,
extension arm, tubehead
Ionization occurs when an x-ray strikes an atom and the atom? - (ANSWER)loses an electron
Which of the following radiograph exposures produces a radiograph that shows the crowns of both the
maxillary and mandibular teeth? - (ANSWER)bitewing
Which of the following anatomical landmarks is NOT normally seen on intraoral radiographs? -
(ANSWER)frontal sinus
The paralleling technique is recommended for which of the following radiograph exposures? -
(ANSWER)bitewing
Which of the following is recommended to help stabilize intraoral film when placed in the patient's
mouth? - (ANSWER)utilize a filmholder
,DANB RHS STUDY QUESTIONS AND ANSWERS
When labeling radiographs, all the following should be included EXCEPT? - (ANSWER)patients diagnosis
Which of the following is a result of primary, secondary and scatter radiation? - (ANSWER)biological
damage
Which of the following should you ask a patient to do before you begin exposing intraoral radiographs? -
(ANSWER)remove glasses
Contrast in a radiograph is primarily controlled by? - (ANSWER)kVp
Paralleling technique requires the film be placed? - (ANSWER)away from the tooth, toward the middle
of the oral cavity
Which film would be exposed to see increased coverage of the alveolar bone? - (ANSWER)vertical
bitewing
What is the primary advantage in using digital radiography? - (ANSWER)reduces the radiation to patient
Which of the following affects the speed of the electrons emitted from the tube head? - (ANSWER)kVp
If there are no teeth to serve as guidelines, which of the following landmarks indicates a maxillary molar
area radiograph? - (ANSWER)tuberosity
For x-ray machines operating in ranges at or below 70 kVp, the total aluminum equivalent filtration must
be a minimum of: - (ANSWER)1.5 mm
On a radiograph, when the contact area of one tooth is superimposed over the contact of another, it is
called? - (ANSWER)overlapping
,DANB RHS STUDY QUESTIONS AND ANSWERS
The purpose of a grid device on an extraoral cassette is to? - (ANSWER)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? - (ANSWER)scatter radiation
While exposing x-ray films, radiation deflecting off the patient's head is called? - (ANSWER)scatter
radiation
Which of the following equations is used to determine the occupational maximum accumulated dose
(MAD) of radiation? - (ANSWER)age minus 18 times 5 rems/year
Which of the following cells exposed to radiation may be associated with leukemia? - (ANSWER)somatic
Leakage radiation is defined as any radiation that? - (ANSWER)escapes through the shielding of an X-ray
tube housing
To help desensitize the tissue prior to film replacement, the dental assistant should? - (ANSWER)rub a
finger along the tissues where the film touches
To assist the patient in controlling the gag reflex, the dental assistant should? - (ANSWER)use a
distraction technique
When documenting a lesion found on a radiograph, all the following should be described EXCEPT? -
(ANSWER)severity
Impacted third molars are best seen with what type of radiograph? - (ANSWER)panoramic
Chemical agents should be properly disposed of according to? - (ANSWER)federal, state, and local laws
, DANB RHS STUDY QUESTIONS AND ANSWERS
What size film is most effective, when placed vertically in the anterior region, to evaluate caries and
periodontal health? - (ANSWER)size 2
Using the ALARA concept as a guideline for radiographs includes all the following EXCEPT? -
(ANSWER)using a circular PID
Which of following extraoral radiographs is used to evaluate impacted teeth, large lesions, and fractures
of the mandible? - (ANSWER)lateral jaw projection
When preparing to take a digital radiograph, after selecting the appropriate sensor size for the patient
the next step is to? - (ANSWER)place a barrier on the sensor
Which of the following affects the quantity of x-rays being emitted from the tube head? - (ANSWER)mA
The patient's records are? - (ANSWER)confidential
The Buccal Object Rule is used to determine if a foreign body is in which direction? - (ANSWER)lingual to
buccal
Patients receive less radiation when using a? - (ANSWER)rectangular PID
Dental healthcare personnel who are pregnant can expose radiographs during the? - (ANSWER)entire
pregnancy
When using a 16-inch PID compared to an 8-inch PID the exposure time must? - (ANSWER)be increased
Light colored radiographs commonly result from? - (ANSWER)underexposure
Radiation injury results from? - (ANSWER)exposure
