Dental Assisting Radiology MN Licensure
Exam 2026 Questions and Answers
This is a device used to reduce the amount of scatter radiation that reaches an
extraoral film during exposure. - Correct answer-grid
Identify the error that causes teeth to appear foreshortened on a radiograph. -
Correct answer-excessive vertical angle
Identify the benefit of using a long-cone (16 inch) position-indicating device,
versus a short-cone (8inch) position indicating device. - Correct answer-less
magnification
What is the angulation of the central ray when using the bisection angle technique?
- Correct answer-90 degrees to the imaginary bisector
The clearing test is used for checking the: - Correct answer-fixer solution
The step-up transformer is activated by the: - Correct answer-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: -
Correct answer-3
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, Which type pf PID (positioning indicating device) is most effective in reducing
patient exposure? - Correct answer-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 - Correct answer-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
d. molybdenum cup - Correct answer-a. lead plate
What is the purpose of the lead foil in the film packets? - Correct answer-to stop
the backscatter radiation
The step-down transformer is controlled by the? - Correct answer-mA dial
(milliamperage)
©COPYRIGHT 2025, ALL RIGHTS RESERVED 2
Exam 2026 Questions and Answers
This is a device used to reduce the amount of scatter radiation that reaches an
extraoral film during exposure. - Correct answer-grid
Identify the error that causes teeth to appear foreshortened on a radiograph. -
Correct answer-excessive vertical angle
Identify the benefit of using a long-cone (16 inch) position-indicating device,
versus a short-cone (8inch) position indicating device. - Correct answer-less
magnification
What is the angulation of the central ray when using the bisection angle technique?
- Correct answer-90 degrees to the imaginary bisector
The clearing test is used for checking the: - Correct answer-fixer solution
The step-up transformer is activated by the: - Correct answer-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: -
Correct answer-3
©COPYRIGHT 2025, ALL RIGHTS RESERVED 1
, Which type pf PID (positioning indicating device) is most effective in reducing
patient exposure? - Correct answer-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 - Correct answer-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
d. molybdenum cup - Correct answer-a. lead plate
What is the purpose of the lead foil in the film packets? - Correct answer-to stop
the backscatter radiation
The step-down transformer is controlled by the? - Correct answer-mA dial
(milliamperage)
©COPYRIGHT 2025, ALL RIGHTS RESERVED 2
