Radiologic Technologist (ARRT) Practice
Question And Correct Answers (Verified
Answers) Plus Rationales 2026 Q&A Instant
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Radiologic Technologist (ARRT) Practice Exam
1. What is the primary function of the collimator?
A. Increase radiation dose
B. Reduce scatter radiation
C. Improve image contrast by limiting beam size
D. Filter low-energy photons
Answer: C
Rationale: Collimation limits the size of the x-ray beam, which
reduces scatter and improves image contrast.
2. Which type of radiation is produced at the anode?
A. Characteristic radiation
B. Compton radiation
C. Radiofrequency waves
D. Visible light
Answer: A
Rationale: Characteristic radiation occurs when outer-shell
electrons fill inner-shell vacancies at the anode target.
3. What is the main purpose of aluminum filtration?
A. Increase beam intensity
B. Reduce patient motion
, C. Remove low-energy photons
D. Increase focal spot size
Answer: C
Rationale: Filtration removes low-energy x-rays that would be
absorbed by the patient without improving image quality.
4. Which imaging factor primarily controls image contrast?
A. mA
B. Time
C. kVp
D. Distance
Answer: C
Rationale: kVp affects beam energy and penetration, directly
influencing image contrast.
5. The ALARA principle stands for:
A. As Long As Radiation Allows
B. As Low As Radiation Achieved
C. As Light As Radiography Allows
D. As Low As Reasonably Achievable
Answer: D
Rationale: ALARA emphasizes minimizing radiation exposure
while obtaining diagnostic images.
6. Which term describes the amount of blackness on a radiograph?
A. Contrast
B. Density
C. Distortion
D. Detail
Answer: B
, Rationale: Radiographic density refers to the overall blackness of
the image.
7. What does SID stand for?
A. Source Image Distance
B. Source-to-Image Distance
C. Standard Image Detail
D. Scatter Imaging Distance
Answer: B
Rationale: SID is the distance from the x-ray source to the image
receptor.
8. What is the function of the grid?
A. Increase patient dose
B. Decrease image sharpness
C. Absorb scattered radiation
D. Increase beam divergence
Answer: C
Rationale: Grids remove scattered radiation before it reaches the
image receptor.
9. What is the primary advantage of digital radiography over film?
A. Higher radiation dose
B. Immediate image availability
C. More motion blur
D. Lower spatial resolution
Answer: B
Rationale: Digital radiography provides quick image display and
efficient workflow.
Question And Correct Answers (Verified
Answers) Plus Rationales 2026 Q&A Instant
Download Pdf
Radiologic Technologist (ARRT) Practice Exam
1. What is the primary function of the collimator?
A. Increase radiation dose
B. Reduce scatter radiation
C. Improve image contrast by limiting beam size
D. Filter low-energy photons
Answer: C
Rationale: Collimation limits the size of the x-ray beam, which
reduces scatter and improves image contrast.
2. Which type of radiation is produced at the anode?
A. Characteristic radiation
B. Compton radiation
C. Radiofrequency waves
D. Visible light
Answer: A
Rationale: Characteristic radiation occurs when outer-shell
electrons fill inner-shell vacancies at the anode target.
3. What is the main purpose of aluminum filtration?
A. Increase beam intensity
B. Reduce patient motion
, C. Remove low-energy photons
D. Increase focal spot size
Answer: C
Rationale: Filtration removes low-energy x-rays that would be
absorbed by the patient without improving image quality.
4. Which imaging factor primarily controls image contrast?
A. mA
B. Time
C. kVp
D. Distance
Answer: C
Rationale: kVp affects beam energy and penetration, directly
influencing image contrast.
5. The ALARA principle stands for:
A. As Long As Radiation Allows
B. As Low As Radiation Achieved
C. As Light As Radiography Allows
D. As Low As Reasonably Achievable
Answer: D
Rationale: ALARA emphasizes minimizing radiation exposure
while obtaining diagnostic images.
6. Which term describes the amount of blackness on a radiograph?
A. Contrast
B. Density
C. Distortion
D. Detail
Answer: B
, Rationale: Radiographic density refers to the overall blackness of
the image.
7. What does SID stand for?
A. Source Image Distance
B. Source-to-Image Distance
C. Standard Image Detail
D. Scatter Imaging Distance
Answer: B
Rationale: SID is the distance from the x-ray source to the image
receptor.
8. What is the function of the grid?
A. Increase patient dose
B. Decrease image sharpness
C. Absorb scattered radiation
D. Increase beam divergence
Answer: C
Rationale: Grids remove scattered radiation before it reaches the
image receptor.
9. What is the primary advantage of digital radiography over film?
A. Higher radiation dose
B. Immediate image availability
C. More motion blur
D. Lower spatial resolution
Answer: B
Rationale: Digital radiography provides quick image display and
efficient workflow.
