RADIOLOGIC TECHNOLOGIST
CERTIFICATION EXAM (ARRT) PRACTICE
QUESTIONS AND CORRECT ANSWERS
(VERIFIED ANSWERS) PLUS RATIONALES
2026 Q&A | INSTANT DOWNLOAD PDF
1. Which of the following is the primary purpose of a grid in
radiography?
A. Increase patient dose
B. Improve image contrast
C. Reduce image sharpness
D. Decrease exposure time
Grids absorb scattered radiation, which improves image contrast.
2. What is the unit of measurement for absorbed dose in radiology?
A. Roentgen
B. Gray (Gy)
C. Sievert
D. Coulomb/kg
Gray measures the amount of radiation energy absorbed per kilogram
of tissue.
3. What type of radiation is produced when high-speed electrons
suddenly decelerate upon striking a target?
A. Alpha radiation
B. Beta radiation
,C. Bremsstrahlung radiation
D. Gamma radiation
Bremsstrahlung radiation is produced when electrons decelerate in the
target material.
4. Which of the following factors has the greatest influence on
radiographic contrast?
A. mAs
B. kVp
C. Focal spot size
D. SID
kVp controls the energy of the x-ray beam, which directly affects image
contrast.
5. Which projection is most appropriate to visualize the sinuses?
A. AP cervical spine
B. Lateral chest
C. Waters view
D. PA skull
The Waters view positions the patient to best visualize the maxillary
sinuses.
6. What is the main purpose of collimation in radiography?
A. Increase exposure time
B. Increase scatter
C. Limit patient dose
D. Reduce image contrast
Collimation reduces the size of the x-ray beam, limiting patient exposure
and scatter.
7. What is the function of the anode in an x-ray tube?
, A. Emit electrons
B. Stop electrons and produce x-rays
C. Produce scattered radiation
D. Filter low-energy photons
The anode target is struck by electrons, producing x-rays.
8. What is the typical filtration used in diagnostic x-ray tubes?
A. 0.5 mm lead
B. 0.1 mm aluminum
C. 2.5 mm aluminum
D. 5 mm copper
Aluminum filters remove low-energy photons to reduce patient dose.
9. Which term describes the sharpness of the structural lines on a
radiograph?
A. Density
B. Resolution
C. Contrast
D. Distortion
Resolution refers to the ability to distinguish small structures clearly.
10. Which of the following is the correct relationship between mAs
and density?
A. mAs and density are inversely proportional
B. mAs and density are directly proportional
C. mAs and density are unrelated
D. mAs affects only contrast
Increasing mAs increases the number of photons reaching the image
receptor, thus increasing density.
11. During fluoroscopy, which technique minimizes patient dose?
CERTIFICATION EXAM (ARRT) PRACTICE
QUESTIONS AND CORRECT ANSWERS
(VERIFIED ANSWERS) PLUS RATIONALES
2026 Q&A | INSTANT DOWNLOAD PDF
1. Which of the following is the primary purpose of a grid in
radiography?
A. Increase patient dose
B. Improve image contrast
C. Reduce image sharpness
D. Decrease exposure time
Grids absorb scattered radiation, which improves image contrast.
2. What is the unit of measurement for absorbed dose in radiology?
A. Roentgen
B. Gray (Gy)
C. Sievert
D. Coulomb/kg
Gray measures the amount of radiation energy absorbed per kilogram
of tissue.
3. What type of radiation is produced when high-speed electrons
suddenly decelerate upon striking a target?
A. Alpha radiation
B. Beta radiation
,C. Bremsstrahlung radiation
D. Gamma radiation
Bremsstrahlung radiation is produced when electrons decelerate in the
target material.
4. Which of the following factors has the greatest influence on
radiographic contrast?
A. mAs
B. kVp
C. Focal spot size
D. SID
kVp controls the energy of the x-ray beam, which directly affects image
contrast.
5. Which projection is most appropriate to visualize the sinuses?
A. AP cervical spine
B. Lateral chest
C. Waters view
D. PA skull
The Waters view positions the patient to best visualize the maxillary
sinuses.
6. What is the main purpose of collimation in radiography?
A. Increase exposure time
B. Increase scatter
C. Limit patient dose
D. Reduce image contrast
Collimation reduces the size of the x-ray beam, limiting patient exposure
and scatter.
7. What is the function of the anode in an x-ray tube?
, A. Emit electrons
B. Stop electrons and produce x-rays
C. Produce scattered radiation
D. Filter low-energy photons
The anode target is struck by electrons, producing x-rays.
8. What is the typical filtration used in diagnostic x-ray tubes?
A. 0.5 mm lead
B. 0.1 mm aluminum
C. 2.5 mm aluminum
D. 5 mm copper
Aluminum filters remove low-energy photons to reduce patient dose.
9. Which term describes the sharpness of the structural lines on a
radiograph?
A. Density
B. Resolution
C. Contrast
D. Distortion
Resolution refers to the ability to distinguish small structures clearly.
10. Which of the following is the correct relationship between mAs
and density?
A. mAs and density are inversely proportional
B. mAs and density are directly proportional
C. mAs and density are unrelated
D. mAs affects only contrast
Increasing mAs increases the number of photons reaching the image
receptor, thus increasing density.
11. During fluoroscopy, which technique minimizes patient dose?
