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Dental Assisting Radiology MN Licensure Questions and Answers | Latest Update
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  • Dental Assisting Radiology
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  • Dental Assisting Radiology

This is a device used to reduce the amount of scatter radiation that reaches an extraoral film during exposure. -:- grid Identify the error that causes teeth to appear foreshortened on a radiograph. -:- excessive vertical angle Identify the benefit of using a long-cone (16 inch) position-in...

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  • September 12, 2024
  • 16
  • 2024/2025
  • Exam (elaborations)
  • Questions & answers

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  • dental assisting radiology mn licensure questions

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  • Dental Assisting Radiology
  • Dental Assisting Radiology

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2024 /2025 | © copyright | This work may not be copied for profit gain | Excel!




Dental Assisting Radiology MN Licensure
Questions and Answers | Latest Update
This is a device used to reduce the amount of scatter radiation that reaches an extraoral

film during exposure.

✓ -:- grid




Identify the error that causes teeth to appear foreshortened on a radiograph.

✓ -:- excessive vertical angle




Identify the benefit of using a long-cone (16 inch) position-indicating device, versus a short-

cone (8inch) position indicating device.

✓ -:- less magnification




What is the angulation of the central ray when using the bisection angle technique?

✓ -:- 90 degrees to the imaginary bisector




The clearing test is used for checking the:

✓ -:- fixer solution




The step-up transformer is activated by the:




1|P a g e | G r a d e A + | 2 0 2 0 2 5

,2024 /2025 | © copyright | This work may not be copied for profit gain | Excel!


✓ -:- exposure button




If the intensity of a beam of radiation is given a value of "12" at a point 12 inches from the

target the intensity of the beam at 24 inches from the target would be:

✓ -:- 3




Which type pf PID (positioning indicating device) is most effective in reducing patient

exposure?

✓ -:- rectangular




Which of the following describes the use of a filter in a dental x-ray machine?

a. a filter removes low-energy x-rays

b. a filer decreases the mean energy of the beam

c. a filer reduces the size and shape of the beam

d. a filer removes the dose of radiation to the thyroid gland

✓ -:- a. filter removes low-energy x-rays




Which of the following is used as a collimator?

a. lead plate

b. aluminum plate

c. copper plate


2|P a g e | G r a d e A + | 2 0 2 0 2 5

, 2024 /2025 | © copyright | This work may not be copied for profit gain | Excel!


d. molybdenum cup

✓ -:- a. lead plate




What is the purpose of the lead foil in the film packets?

✓ -:- to stop the backscatter radiation




The step-down transformer is controlled by the?

✓ -:- mA dial (milliamperage)




Where are x-rays produced?

✓ -:- positive anode




X-rays are made up of:

✓ -:- photons




Which film speed is currently the fastest intraoral film available?

✓ -:- F speed film




Which of the following appear most radiopaque on a radiograph?

a. enamel

b. silver points


3|P a g e | G r a d e A + | 2 0 2 0 2 5

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