DENTAL ASSISTING RADIOLOGY PRACTICE EXAM
QUESTIONS AND CORRECT ANSWERS. COMPLETE
VERIFIED SOLUTION 2026-2027
A lead apron and a thyroid collar - correct answer-must be used on all patients for all exposures
A good technique for reducing the radiation exposure to both patient and operator is the use of -
correct answer-fast film or digital imaging
A patient is concerned with radiation exposure. You can assure him that your office uses the ALARA c
oncept, which includes - correct answer-
reducing the number of exposures, minimizing retakes, keeping exposure levels as low as possible
All of the following structures will appear radiolucent on dental x-ray film except - correct answer-
metal restorations
An example of cumulative radiation exposure is - correct answer-cataracts, leukemia, cancer
Anything that occupies space and has a form or shape is - correct answer-matter
Because the entire x-
ray area is considered a radiation hazard area, a radiation hazard sign must be posted in -
correct answer-sight of patients, and sight of personnel
Chronic radiation exposure occurs when dose of radiation is received over a time per
iod - correct answer-small; long
Damage caused by ionizing x-radiation to genetic cells: - correct answer-can affect future generations
Damage to which type of cell is passed on to future generations? - correct answer-genetic cell
, Exposure to radiation: - correct answer-
no matter how small, has the potential to cause harmful biologic change
How much filtration is federally required for a dental x-ray machine operating over 70 kVp? -
correct answer-2.5 mm
One of the rules of radiation protection is never stand closer than feet from the x-
ray unit during an exposure - correct answer-6
Primary radiation is: - correct answer-also called the useful beam, the beam of x-
ray that comes from the target
Secondary radiation: - correct answer-refer to x-
radiation that is created when the primary beam interacts with matter
The Guidelines for Prescribing Dental Radiographs issued by the ADA and the FDA recommend whic
h of the following dental imaging procedures for a pregnant patient? - correct answer-
Radiographic imaging procedures do not need to be altered because of pregnancy
The maximum permissible dose for an occupational worker for an individual 18 years of age or older i
s _____ rem/year - correct answer-5
The x-ray was discovered on November 8, 1895, by: - correct answer-Wilhelm Conrad Roentgen
Who should hold the film in a patient's mouth if the patient is unable to do so? - correct answer-
Parent or relative of the patient
When the matter switch is on: - correct answer-the electron cloud is emitted
An extraoral dental x-ray film is: - correct answer-more sensitive to light than intraoral film
Automatic film processing requires than manual film processing does - correct answer-
less equipment
QUESTIONS AND CORRECT ANSWERS. COMPLETE
VERIFIED SOLUTION 2026-2027
A lead apron and a thyroid collar - correct answer-must be used on all patients for all exposures
A good technique for reducing the radiation exposure to both patient and operator is the use of -
correct answer-fast film or digital imaging
A patient is concerned with radiation exposure. You can assure him that your office uses the ALARA c
oncept, which includes - correct answer-
reducing the number of exposures, minimizing retakes, keeping exposure levels as low as possible
All of the following structures will appear radiolucent on dental x-ray film except - correct answer-
metal restorations
An example of cumulative radiation exposure is - correct answer-cataracts, leukemia, cancer
Anything that occupies space and has a form or shape is - correct answer-matter
Because the entire x-
ray area is considered a radiation hazard area, a radiation hazard sign must be posted in -
correct answer-sight of patients, and sight of personnel
Chronic radiation exposure occurs when dose of radiation is received over a time per
iod - correct answer-small; long
Damage caused by ionizing x-radiation to genetic cells: - correct answer-can affect future generations
Damage to which type of cell is passed on to future generations? - correct answer-genetic cell
, Exposure to radiation: - correct answer-
no matter how small, has the potential to cause harmful biologic change
How much filtration is federally required for a dental x-ray machine operating over 70 kVp? -
correct answer-2.5 mm
One of the rules of radiation protection is never stand closer than feet from the x-
ray unit during an exposure - correct answer-6
Primary radiation is: - correct answer-also called the useful beam, the beam of x-
ray that comes from the target
Secondary radiation: - correct answer-refer to x-
radiation that is created when the primary beam interacts with matter
The Guidelines for Prescribing Dental Radiographs issued by the ADA and the FDA recommend whic
h of the following dental imaging procedures for a pregnant patient? - correct answer-
Radiographic imaging procedures do not need to be altered because of pregnancy
The maximum permissible dose for an occupational worker for an individual 18 years of age or older i
s _____ rem/year - correct answer-5
The x-ray was discovered on November 8, 1895, by: - correct answer-Wilhelm Conrad Roentgen
Who should hold the film in a patient's mouth if the patient is unable to do so? - correct answer-
Parent or relative of the patient
When the matter switch is on: - correct answer-the electron cloud is emitted
An extraoral dental x-ray film is: - correct answer-more sensitive to light than intraoral film
Automatic film processing requires than manual film processing does - correct answer-
less equipment
