X RAY PRACTICE TEST COMPREHENSIVE
REVIEW 2026 COMPLETE QUESTIONS AND
CORRECT ANSWERS GRADED A+
◉ the limited operator can reduce repeat exposure.
Answer: clearly instructing patients
◉ how does the x-ray beam restriction minimize patient exposure.
Answer: it limits the radiation field to the area of interest
◉ what is the device that allows the limited operator to vary the size
of the radiation field.
Answer: collimator
◉ how does filtration reduce patient exposure.
Answer: removes longer-wavelength photons
◉ The National Council on Radiation Protection and
Measurements(NCRP) recommendation for the amount of total
filtration.
Answer: 2.5 mm Al equiv
,◉ Three principal methods used to protect limited operators from
unnecessary radiation exposure.
Answer: time, distance, and shielding
◉ The following is not a type of personal radiation shielding.
Answer: Shadow
◉ personnel shielding must be worn on the rare occasion during
which the limited operator may need to remain in the radiographic
room during an exposure to assist the patient in maintaining the
proper position. What is the source of the greatest radiation hazard
under this circumstance.?.
Answer: scattered radiation from the patient
◉ the term for radiation the escapes from the x-ray tube housing.
Answer: leakage radiation
◉ why are limited operators prohibited from activities that result in
direct exposure to the primary x-ray beam.
Answer: they are considered occupationally exposed individuals
◉ distance, as a method used to limit operator exposure, means that.
Answer: the operator should maximize the distance from the source
during an exposure
,◉ shielding worn for personnel protection is designed to attenuate
what source of exposure.
Answer: scatter radiation
◉ the acronym for a common type of personnel dosimeter.
Answer: TLD
◉ What is the recommended placement for personnel dosimeter on
the body of the limited operator.
Answer: the badge should be worn in the region of the collar on the
anterior surface of the body and outside the lead apron, if worn
◉ The NCRP recommended annual effective dose limit for
occupational exposure.
Answer: 5.0 rem (0.05 Sv)
◉ The NCRP recommended monthly effective (or equivalent) dose
limit to the fetus for a pregnant worker.
Answer: 0.05 rem (0.0005 Sv)
◉ Radiation monitoring of personnel is required when what
percentage of the annual occupational effective dose limit is likely to
be received.
, Answer: 10%
◉ The conventional (British system) radiation unit to express
radiation intensity in the air.
Answer: Roentgen
◉ The conventional (British system) unit commonly used to report
occupational dose to radiation workers in the United States is the.
Answer: rem
◉ What is the conventional (British system) radiation unit of
absorbed dose.
Answer: Rad
◉ According to the Bergonie-Tribondeau law, the following types of
cells are most radiosensitive.
Answer: embryonic tissue cells
◉ Type of x-ray photon interaction with the body is primarily
responsible for the radiation dose absorbed by the patient.
Answer: Photoelectric
REVIEW 2026 COMPLETE QUESTIONS AND
CORRECT ANSWERS GRADED A+
◉ the limited operator can reduce repeat exposure.
Answer: clearly instructing patients
◉ how does the x-ray beam restriction minimize patient exposure.
Answer: it limits the radiation field to the area of interest
◉ what is the device that allows the limited operator to vary the size
of the radiation field.
Answer: collimator
◉ how does filtration reduce patient exposure.
Answer: removes longer-wavelength photons
◉ The National Council on Radiation Protection and
Measurements(NCRP) recommendation for the amount of total
filtration.
Answer: 2.5 mm Al equiv
,◉ Three principal methods used to protect limited operators from
unnecessary radiation exposure.
Answer: time, distance, and shielding
◉ The following is not a type of personal radiation shielding.
Answer: Shadow
◉ personnel shielding must be worn on the rare occasion during
which the limited operator may need to remain in the radiographic
room during an exposure to assist the patient in maintaining the
proper position. What is the source of the greatest radiation hazard
under this circumstance.?.
Answer: scattered radiation from the patient
◉ the term for radiation the escapes from the x-ray tube housing.
Answer: leakage radiation
◉ why are limited operators prohibited from activities that result in
direct exposure to the primary x-ray beam.
Answer: they are considered occupationally exposed individuals
◉ distance, as a method used to limit operator exposure, means that.
Answer: the operator should maximize the distance from the source
during an exposure
,◉ shielding worn for personnel protection is designed to attenuate
what source of exposure.
Answer: scatter radiation
◉ the acronym for a common type of personnel dosimeter.
Answer: TLD
◉ What is the recommended placement for personnel dosimeter on
the body of the limited operator.
Answer: the badge should be worn in the region of the collar on the
anterior surface of the body and outside the lead apron, if worn
◉ The NCRP recommended annual effective dose limit for
occupational exposure.
Answer: 5.0 rem (0.05 Sv)
◉ The NCRP recommended monthly effective (or equivalent) dose
limit to the fetus for a pregnant worker.
Answer: 0.05 rem (0.0005 Sv)
◉ Radiation monitoring of personnel is required when what
percentage of the annual occupational effective dose limit is likely to
be received.
, Answer: 10%
◉ The conventional (British system) radiation unit to express
radiation intensity in the air.
Answer: Roentgen
◉ The conventional (British system) unit commonly used to report
occupational dose to radiation workers in the United States is the.
Answer: rem
◉ What is the conventional (British system) radiation unit of
absorbed dose.
Answer: Rad
◉ According to the Bergonie-Tribondeau law, the following types of
cells are most radiosensitive.
Answer: embryonic tissue cells
◉ Type of x-ray photon interaction with the body is primarily
responsible for the radiation dose absorbed by the patient.
Answer: Photoelectric
