ARRT Practice exam – core Questions and
Answers
Which of the following statements are correct regarding the link between radiation dose and genetic
effects?
1. The link has been demonstrated in human studies.
2. The link has been demonstrated in animal studies.
3. Increased risk to humans cannot be predicted with respect to an individual. - correct answers:2 and 3
only
Which of the following changes in kabob will result in the greatest reduction of patient dose when mAs is
adjusted to compensate for the change?
A. Decrease kVp by 30%
B. Decrease kVp by 15%
C. Increase kVp by 15%
D. Increase kVp by 30% - correct answers:D. Increase kVp by 30%
Which of the following IR system speeds will result in the lowest patient dose? - correct answers:B.
Faster-speed IR system
What is the primary purpose of using gonad shields during radiography? - correct answers:Reduce the
likelihood of genetic effects
Which of the following are types of gonad shields?
1. Aperture
2. Contact
3. Shadow - correct answers:2 and 3 only
When should gonad shielding be used? - correct answers:When the gonads are within 5 cm of the
radiation field.
, The greatest cause of unnecessary radiation to patients that can be controlled by the limited operator is:
- correct answers:repeat exposures
The limited operator can reduce repeat exposures by: - correct answers:clearly instructing patients
How does x-ray beam restriction minimize patient exposure? - correct answers:It limits the radiation field
to the area of interest.
What is a device that allows the limited operator to vary the size of the radiation field? - correct
answers:Collimator
How does filtration reduce patient exposure? - correct answers:Removes longer-wavelength photons
What is the NCRP recommendation for the amount of total filtration? - correct answers:2.5 mm AL equiv
What are the three principal methods used to protect limited operators from unnecessary radiation
exposure? - correct answers:Time, distance, shielding
Which of the following is not a type of personal radiation shielding?
A. Apron
B. Glove
C. Thyroid shield
D. Shadow - correct answers: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? - correct
answers:Scattered radiation from the patient
What is the term for radiation that escapes from the x-ray tube housing? - correct answers:Leakage
radiation
Answers
Which of the following statements are correct regarding the link between radiation dose and genetic
effects?
1. The link has been demonstrated in human studies.
2. The link has been demonstrated in animal studies.
3. Increased risk to humans cannot be predicted with respect to an individual. - correct answers:2 and 3
only
Which of the following changes in kabob will result in the greatest reduction of patient dose when mAs is
adjusted to compensate for the change?
A. Decrease kVp by 30%
B. Decrease kVp by 15%
C. Increase kVp by 15%
D. Increase kVp by 30% - correct answers:D. Increase kVp by 30%
Which of the following IR system speeds will result in the lowest patient dose? - correct answers:B.
Faster-speed IR system
What is the primary purpose of using gonad shields during radiography? - correct answers:Reduce the
likelihood of genetic effects
Which of the following are types of gonad shields?
1. Aperture
2. Contact
3. Shadow - correct answers:2 and 3 only
When should gonad shielding be used? - correct answers:When the gonads are within 5 cm of the
radiation field.
, The greatest cause of unnecessary radiation to patients that can be controlled by the limited operator is:
- correct answers:repeat exposures
The limited operator can reduce repeat exposures by: - correct answers:clearly instructing patients
How does x-ray beam restriction minimize patient exposure? - correct answers:It limits the radiation field
to the area of interest.
What is a device that allows the limited operator to vary the size of the radiation field? - correct
answers:Collimator
How does filtration reduce patient exposure? - correct answers:Removes longer-wavelength photons
What is the NCRP recommendation for the amount of total filtration? - correct answers:2.5 mm AL equiv
What are the three principal methods used to protect limited operators from unnecessary radiation
exposure? - correct answers:Time, distance, shielding
Which of the following is not a type of personal radiation shielding?
A. Apron
B. Glove
C. Thyroid shield
D. Shadow - correct answers: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? - correct
answers:Scattered radiation from the patient
What is the term for radiation that escapes from the x-ray tube housing? - correct answers:Leakage
radiation
