RADIATION HEALTH AND SAFETY
PRACTICE UPDATED SCRIPT 2026
PRACTICE SOLUTIONS GRADED A+
●● Which unit is a standard measurement of amount of radiation
absorbed by a tissue?
a. photon
b. electron
c. kilogram
d. gray. Answer: d
●● Where should the thermometer be kept for manual processing
procedures?
a. water bath
b. fixer solution
c. developer solution
d. light-tight drawer inside the darkroom. Answer: c
●● Which technique would be most helpful for a patient with a gag
reflex?
a. work slowly
b. convey a confident attitude
,c. begin with the maxillary molar exposure
d. slide the receptor across the palate of the patient. Answer: b
●● What radiology technique is used to identify interproximal caries,
and is useful in discovering early carious lesions that are not clinically
visible?
a. paralleling
b. bitewing
c. bisecting
d. occlusal. Answer: B
●● Which is least sensitive to the effects of radiation?
a. skin
b. nerve
c. mucosa
d. bone marrow. Answer: b
●● The patient states that movement occurred during x-ray exposure.
Which error will result on the image?
a. decreased distortion
b. increased sharpness
c. decreased sharpness
d. increased magnification. Answer: c
,●● A four-year-old child presents for a first dental visit. The dentist asks
you to expose radiographs if possible. Which radiographs are most likely
to be successfully attained?
a. diagnosis of occlusal caries
b. assessment of eruption patterns
c. evaluation of periapical pathology
d. measurement of periodontal bone loss. Answer: b
●● Which metal offers the most protection to patients by absorbing
scatter radiation?
a. lead
b. copper
c. tungsten
d. aluminum. Answer: a
●● What is the recommended area of exposure, in inches, as the beam
reaches the patient's face?
a. 3.0
b. 2.75
c. 2.55
d. 2.25. Answer: b
, ●● Which is a suitable use of a panoramic radiograph?
a. diagnosis of occlusal caries
b. assessment of eruption patterns
c. evaluation of periapical pathology
d. measurement of periodontal bone loss. Answer: b
●● When viewing a mount, which film should be placed in the top row,
far left corner?
a. left molar bitewing
b. right molar bitewing
c. maxillary left molar periapical
c. maxillary right molar periapical. Answer: d
●● Which is the minimum distance in feet that an operator should stand
from the source of x-radiation?
a. 4
b. 6
c. 8
d. 10. Answer: b
●● Which error produces a darker radiographic image?
a. fixer solution was too cold
b. film left in the water rinse too long
PRACTICE UPDATED SCRIPT 2026
PRACTICE SOLUTIONS GRADED A+
●● Which unit is a standard measurement of amount of radiation
absorbed by a tissue?
a. photon
b. electron
c. kilogram
d. gray. Answer: d
●● Where should the thermometer be kept for manual processing
procedures?
a. water bath
b. fixer solution
c. developer solution
d. light-tight drawer inside the darkroom. Answer: c
●● Which technique would be most helpful for a patient with a gag
reflex?
a. work slowly
b. convey a confident attitude
,c. begin with the maxillary molar exposure
d. slide the receptor across the palate of the patient. Answer: b
●● What radiology technique is used to identify interproximal caries,
and is useful in discovering early carious lesions that are not clinically
visible?
a. paralleling
b. bitewing
c. bisecting
d. occlusal. Answer: B
●● Which is least sensitive to the effects of radiation?
a. skin
b. nerve
c. mucosa
d. bone marrow. Answer: b
●● The patient states that movement occurred during x-ray exposure.
Which error will result on the image?
a. decreased distortion
b. increased sharpness
c. decreased sharpness
d. increased magnification. Answer: c
,●● A four-year-old child presents for a first dental visit. The dentist asks
you to expose radiographs if possible. Which radiographs are most likely
to be successfully attained?
a. diagnosis of occlusal caries
b. assessment of eruption patterns
c. evaluation of periapical pathology
d. measurement of periodontal bone loss. Answer: b
●● Which metal offers the most protection to patients by absorbing
scatter radiation?
a. lead
b. copper
c. tungsten
d. aluminum. Answer: a
●● What is the recommended area of exposure, in inches, as the beam
reaches the patient's face?
a. 3.0
b. 2.75
c. 2.55
d. 2.25. Answer: b
, ●● Which is a suitable use of a panoramic radiograph?
a. diagnosis of occlusal caries
b. assessment of eruption patterns
c. evaluation of periapical pathology
d. measurement of periodontal bone loss. Answer: b
●● When viewing a mount, which film should be placed in the top row,
far left corner?
a. left molar bitewing
b. right molar bitewing
c. maxillary left molar periapical
c. maxillary right molar periapical. Answer: d
●● Which is the minimum distance in feet that an operator should stand
from the source of x-radiation?
a. 4
b. 6
c. 8
d. 10. Answer: b
●● Which error produces a darker radiographic image?
a. fixer solution was too cold
b. film left in the water rinse too long
