DANB Radiology Practice Exam with Correct Answers
According to the American Academy of Oral Maxillofacial Radiology, how often should an x-ray machine be tested? - Answer-Annually
Which of the following would likely NOT be necessary in the case of an accidental radiation exposure? - Answer-Evac...
DANB Radiology Practice
Exam with Correct
Answers
According to the American Academy of Oral Maxillofacial Radiology, how often should
an x-ray machine be tested? - Answer-Annually
Which of the following would likely NOT be necessary in the case of an accidental
radiation exposure? - Answer-Evacuate the building
- Report the exposure to the Radiation Protection Office (RPO)
- Turn the power to the system off immediately
- Advise exposed individuals to obtain medical care if needed.
Chronic radiation exposure to the lens of the eye may result in: - Answer-Cataracts -
dense, cloudy area that forms in the lens of the eye
What is the maximum permissible dose (MPD) of radiation for a dental assistant? -
Answer-5 rem/year
Which of the following is considered secondary radiation? - Answer-Radiation that
reflects off the patients face - produced by the interaction of x-rays with matter
Whihc of the following is not an effective way that the "as low as reasonably achievable"
(ALARA) principle can be achieved in the dental office for the protection of the patient? -
Answer-Use of D Film - want to use fastest speed to minimize exposure (F-film)
1) use of lead aprons and thyroid collars
2) minimize the time of exposure
3) Use of the radiographs
What is the proper distance for the operator to stand away from the x-ray beam to
minimize exposure? - Answer-6 feet
Which statement best describes the effects of long-term low-dose radiation exposure? -
Answer-The effect of long-term low-dose radiation exposure can cause changes at the
cellular level in the human body that would not be observed for many years.
What part of the x-ray machine functions to remove the most dangerous x-rays from
reaching both the patient and the operator? - Answer-Aluminum filter - filters out long-
, wave rays from the primary beam (For x-rays operating at ranges at or below 70 kvP,
the total aluminum equivalent filtration must be a minimum of 1.5mm.)
A young patienet is having difficulty holding still for x-rays. What is the most appropriate
step for the dental assistant to take? - Answer-Ask the parent to have the child sit on his
or her lap with both covered by the lead apron
What is the correct way for a dental assistant to wear a dosimeter? - Answer-Only when
she/he is at the dental office
During what stage of pregnancy is the fetus most sensitive to the effects of radiation
exposure? - Answer-Weeks 2 through 15
What is the best possible scenario for a pregnant dental assistant in terms of
employment? - Answer-The dental assistant should make her decision as early in the
pregnancy as possible regarding whether the risks to her unborn child are acceptable in
her current position.
Which of the following will result in a radiographic image that is too light? - Answer-
Wear developing solution - this means that the image was underexposed
Dilaceration in the radiographic image indicates the: - Answer-Root shape is abnormally
bent or curved.
Dilaceration - developmental disturbance in shape of teeth
- Angulation/sharp bent curve
- More likely to affect maxillary incisors and in permanent dentition
Which of the following should be used to prevent cross-contamination from exposure
buttons? - Answer-Plastic cover
Which of the following is a long-term effect of radiation? - Answer-Genetic defects
Duplicating film is coated with - Answer-One-sided emulsion
- Non-emulsion (dark) - prevents light from passing back from the film
After the completion of a radiographic procedure, the PID should be - Answer-
Disinfected
Phosphor plates are processed by using - Answer-Laser beam technology
Which of the following in the measurement of force that refers to the potential difference
between two electrical charges? - Answer-Voltage
Which of the following PID produces the greatest amount of secondary radiation? -
Answer-Closed-ended plastic cone
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