DENTAL ASSISTING MN LICENSURE
CERTIFICATION EXAM SCRIPT 2026
COMPLETE QUESTIONS AND SOLUTIONS
◉Identify the error that causes teeth to appear foreshortened on a
radiograph. 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. Answer:
less magnification
◉What is the angulation of the central ray when using the bisection
angle technique? Answer: 90 degrees to the imaginary bisector
◉The clearing test is used for checking the: Answer: fixer solution
◉The step-up transformer is activated by the: 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: Answer: 3
, ◉Which type pf PID (positioning indicating device) is most effective in
reducing patient exposure? 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 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 Answer: a. lead plate
◉What is the purpose of the lead foil in the film packets? Answer: to
stop the backscatter radiation
◉The step-down transformer is controlled by the? Answer: mA dial
(milliamperage)
CERTIFICATION EXAM SCRIPT 2026
COMPLETE QUESTIONS AND SOLUTIONS
◉Identify the error that causes teeth to appear foreshortened on a
radiograph. 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. Answer:
less magnification
◉What is the angulation of the central ray when using the bisection
angle technique? Answer: 90 degrees to the imaginary bisector
◉The clearing test is used for checking the: Answer: fixer solution
◉The step-up transformer is activated by the: 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: Answer: 3
, ◉Which type pf PID (positioning indicating device) is most effective in
reducing patient exposure? 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 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 Answer: a. lead plate
◉What is the purpose of the lead foil in the film packets? Answer: to
stop the backscatter radiation
◉The step-down transformer is controlled by the? Answer: mA dial
(milliamperage)
