DANB RADIOLOGY EXAM QUESTIONS
AND ANSWERS ALL CORRECT
Which organ is the most sensitive to radiographic exposure?
a) Nasal cavity
b) Parotid gland
c) Ear canal
d) Thyroid gland - Answer- thyroid gland
The radiation exposure that possesses the greatest hazard to the operator is
a) primary radiation.
b) scatter radiation.
c) collimated radiation.
d) leakage radiation. - Answer- Leakage radiation
If there is no teeth to serve as guides which of the following landmarks indicates a
maxillary molar area radiograph
a) Incisive foramen
b) Tuberosity
c) Mental foramen
d) Internal oblique ridge - Answer- Tuberosity
Who should the following sequences best describes radiation injury to tissue
a) Period of injury, latent period, period of recovery
b) Latent period, period of recovery. period of injury
c) Period of recovery, period of injury, latent period
d) Latent period, period of injury, period of recovery - Answer- Latent period, period of
injury, period of recovery
Personnel monitoring for radiation exposure is done by
a) observing physical changes over time.
b) reporting exposures to the state.
c) documenting the number of exposures.
d) wearing a dosimeter. - Answer- Wearing a dosimeter
,Which of the following is the most effective method of reducing patient exposure to
radiation?
a) Lead apron
b) Thyroid collar
c) Frequent retakes
d) digital radiography - Answer- digital radiography
Which of the following exposures is used to diagnose interproximal caries?
a) Bitewing
b) Periapical
c) Cephalometric
d) Panoramic - Answer- bitewing
The population most susceptible to radiation damage is
a) Senior citizens.
b) infants.
c) teenagers.
d) middle-aged adults. - Answer- infants
To minimize potential infections from semi-critical items it is important the operator
a) wear utility gloves during digital radiograph exposure.
b) clean and disinfect devices after removal of surface barriers.
c) spray disinfectant on the exposure button between patients.
d) spray the positioning device with an intermediate disinfectant. - Answer- clean and
disinfect devices after removal of surface barriers
Patient should wear a thyroid collar during which type of radiographic exposure
a) Cephalometric radiograph
b) Extraoral radiograph
c) Panoramic radiograph
d) Intraoral radiograph - Answer- Intraoral radiograph
The total destruction of microorganisms and spores on reusable instruments is
accomplished by
a) disinfecting.
b) spraying with a germicide.
c) sterilizing.
d) ultrasonic immersion. - Answer- sterilizing
Which of the following will best protect the dental assistant from cross contamination,
while exposing radiographs
, a) Gloves
b) Barriers on PID
c) Sensor positioning devices.
d) Patient bib - Answer- gloves
The annual maximum accumulated dose of radiation for dental assistant is based on
which of the following calculations
a) Age plus 18 times 3 rems/year
b) Age plus 18 times 5 rems/year
c) Age minus 18 times 3 rems/year
d) Age minus 18 times 5 rems/year - Answer- Age minus 18 times 5 rems/year
Long-term effects of exposure to radiation may be associated with
a) hair loss.
b) nausea and vomiting
c) hemorrhaging.
d) birth abnormalities. - Answer- birth abnormalities
When changing the 8 inch PID to a 16 inch PID, which of the following is used to
determine the intensity of the beam
a) Object-image receptor distance
b) Inverse square law
c) SLOB rule
d) Rule of isometry - Answer- inverse square law
Compared to the paralleling technique a disadvantage of the bisecting angle technique
is
a) the exposure time is longer.
b) the image receptor is more difficult to place.
c) image distortion.
d) increased radiation absorption. - Answer- image distortion
Blurred radiographic, images are often caused by
a) failure to remove dental appliances.
b) patient movement during exposure.
c) improper positioning of the x-ray tube head
d) overlapping bitewing. - Answer- patient movement during exposure
Dental, healthcare personnel can best shield themselves for mediation during patient
exposure by standing behind
AND ANSWERS ALL CORRECT
Which organ is the most sensitive to radiographic exposure?
a) Nasal cavity
b) Parotid gland
c) Ear canal
d) Thyroid gland - Answer- thyroid gland
The radiation exposure that possesses the greatest hazard to the operator is
a) primary radiation.
b) scatter radiation.
c) collimated radiation.
d) leakage radiation. - Answer- Leakage radiation
If there is no teeth to serve as guides which of the following landmarks indicates a
maxillary molar area radiograph
a) Incisive foramen
b) Tuberosity
c) Mental foramen
d) Internal oblique ridge - Answer- Tuberosity
Who should the following sequences best describes radiation injury to tissue
a) Period of injury, latent period, period of recovery
b) Latent period, period of recovery. period of injury
c) Period of recovery, period of injury, latent period
d) Latent period, period of injury, period of recovery - Answer- Latent period, period of
injury, period of recovery
Personnel monitoring for radiation exposure is done by
a) observing physical changes over time.
b) reporting exposures to the state.
c) documenting the number of exposures.
d) wearing a dosimeter. - Answer- Wearing a dosimeter
,Which of the following is the most effective method of reducing patient exposure to
radiation?
a) Lead apron
b) Thyroid collar
c) Frequent retakes
d) digital radiography - Answer- digital radiography
Which of the following exposures is used to diagnose interproximal caries?
a) Bitewing
b) Periapical
c) Cephalometric
d) Panoramic - Answer- bitewing
The population most susceptible to radiation damage is
a) Senior citizens.
b) infants.
c) teenagers.
d) middle-aged adults. - Answer- infants
To minimize potential infections from semi-critical items it is important the operator
a) wear utility gloves during digital radiograph exposure.
b) clean and disinfect devices after removal of surface barriers.
c) spray disinfectant on the exposure button between patients.
d) spray the positioning device with an intermediate disinfectant. - Answer- clean and
disinfect devices after removal of surface barriers
Patient should wear a thyroid collar during which type of radiographic exposure
a) Cephalometric radiograph
b) Extraoral radiograph
c) Panoramic radiograph
d) Intraoral radiograph - Answer- Intraoral radiograph
The total destruction of microorganisms and spores on reusable instruments is
accomplished by
a) disinfecting.
b) spraying with a germicide.
c) sterilizing.
d) ultrasonic immersion. - Answer- sterilizing
Which of the following will best protect the dental assistant from cross contamination,
while exposing radiographs
, a) Gloves
b) Barriers on PID
c) Sensor positioning devices.
d) Patient bib - Answer- gloves
The annual maximum accumulated dose of radiation for dental assistant is based on
which of the following calculations
a) Age plus 18 times 3 rems/year
b) Age plus 18 times 5 rems/year
c) Age minus 18 times 3 rems/year
d) Age minus 18 times 5 rems/year - Answer- Age minus 18 times 5 rems/year
Long-term effects of exposure to radiation may be associated with
a) hair loss.
b) nausea and vomiting
c) hemorrhaging.
d) birth abnormalities. - Answer- birth abnormalities
When changing the 8 inch PID to a 16 inch PID, which of the following is used to
determine the intensity of the beam
a) Object-image receptor distance
b) Inverse square law
c) SLOB rule
d) Rule of isometry - Answer- inverse square law
Compared to the paralleling technique a disadvantage of the bisecting angle technique
is
a) the exposure time is longer.
b) the image receptor is more difficult to place.
c) image distortion.
d) increased radiation absorption. - Answer- image distortion
Blurred radiographic, images are often caused by
a) failure to remove dental appliances.
b) patient movement during exposure.
c) improper positioning of the x-ray tube head
d) overlapping bitewing. - Answer- patient movement during exposure
Dental, healthcare personnel can best shield themselves for mediation during patient
exposure by standing behind
