Dental Assisting Radiology Practice Exam
Questions & Answers 2026/2027 – Latest
Updated Edition
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 concept, 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 period - 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
Questions & Answers 2026/2027 – Latest
Updated Edition
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 concept, 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 period - 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
