Radiologic Technologist Certification
Exam Questions And Correct Answers
(Verified Answers) Plus Rationales 2026
Q&A
1. Which of the following is the primary purpose of a grid in radiography?
A. Increase exposure to the patient
B. Reduce scatter radiation reaching the image receptor
C. Decrease contrast
D. Increase patient dose
Answer: B
Rationale: Grids absorb scatter radiation before it reaches the image
receptor, improving image contrast.
2. What is the main advantage of using a high kVp technique in
radiography?
A. Increases patient dose
B. Improves spatial resolution
C. Penetrates dense tissue more effectively
D. Decreases beam intensity
Answer: C
Rationale: High kVp produces higher energy photons, which penetrate
thicker or denser tissues more effectively.
3. Which of the following best describes the anode heel effect?
A. Uneven tube current across the cathode
B. Variation in X-ray intensity across the X-ray field
C. Decrease in mA over time
D. Inconsistent focal spot size
Answer: B
, Rationale: The anode heel effect causes X-ray intensity to be greater
on the cathode side and less on the anode side of the beam.
4. What is the primary interaction responsible for X-ray attenuation in soft
tissue at 50–100 keV?
A. Pair production
B. Compton scattering
C. Photoelectric absorption
D. Photodisintegration
Answer: B
Rationale: Compton scattering predominates in soft tissue at
diagnostic energies and contributes to scatter radiation.
5. Which radiation protection principle involves keeping exposure time as
low as reasonably achievable?
A. Distance
B. Shielding
C. Time
D. Collimation
Answer: C
Rationale: The time principle in radiation protection emphasizes
minimizing exposure duration to reduce dose.
6. Which of the following factors increases patient dose in radiography?
A. Decreasing mAs
B. Using higher kVp without appropriate filtration
C. Using a grid properly
D. Increasing distance from source
Answer: B
Rationale: High kVp without filtration increases patient dose due to
unnecessary low-energy photons.
7. What type of X-ray tube target material is commonly used for general
radiography?
A. Tungsten
B. Molybdenum
C. Copper
D. Aluminum
Answer: A
Rationale: Tungsten is commonly used in general radiography due to
its high atomic number and melting point.
, 8. In digital radiography, increasing the exposure index (EI) indicates:
A. Underexposure
B. Overexposure
C. Correct exposure
D. No effect on image quality
Answer: B
Rationale: A higher exposure index reflects increased radiation
reaching the detector, indicating overexposure.
9. Which of the following best describes spatial resolution in
radiography?
A. The amount of blackening on the image
B. The ability to distinguish small structures clearly
C. The total dose to the patient
D. The level of scatter radiation
Answer: B
Rationale: Spatial resolution refers to the sharpness and ability to
differentiate small structures on the image.
10. Which radiographic view best demonstrates the sternoclavicular
joint?
A. AP shoulder
B. Serendipity view
C. Lateral chest
D. Oblique cervical spine
Answer: B
Rationale: The Serendipity view is specifically designed to visualize
the sternoclavicular joint.
11. The exposure time in radiography is usually measured in:
A. Seconds
B. Milliseconds
C. Minutes
D. Microamperes
Answer: B
Rationale: Radiographic exposure time is often very short and
measured in milliseconds to control motion blur.
12. In fluoroscopy, the patient dose is highest during:
A. Pulsed fluoroscopy
B. Continuous fluoroscopy
Exam Questions And Correct Answers
(Verified Answers) Plus Rationales 2026
Q&A
1. Which of the following is the primary purpose of a grid in radiography?
A. Increase exposure to the patient
B. Reduce scatter radiation reaching the image receptor
C. Decrease contrast
D. Increase patient dose
Answer: B
Rationale: Grids absorb scatter radiation before it reaches the image
receptor, improving image contrast.
2. What is the main advantage of using a high kVp technique in
radiography?
A. Increases patient dose
B. Improves spatial resolution
C. Penetrates dense tissue more effectively
D. Decreases beam intensity
Answer: C
Rationale: High kVp produces higher energy photons, which penetrate
thicker or denser tissues more effectively.
3. Which of the following best describes the anode heel effect?
A. Uneven tube current across the cathode
B. Variation in X-ray intensity across the X-ray field
C. Decrease in mA over time
D. Inconsistent focal spot size
Answer: B
, Rationale: The anode heel effect causes X-ray intensity to be greater
on the cathode side and less on the anode side of the beam.
4. What is the primary interaction responsible for X-ray attenuation in soft
tissue at 50–100 keV?
A. Pair production
B. Compton scattering
C. Photoelectric absorption
D. Photodisintegration
Answer: B
Rationale: Compton scattering predominates in soft tissue at
diagnostic energies and contributes to scatter radiation.
5. Which radiation protection principle involves keeping exposure time as
low as reasonably achievable?
A. Distance
B. Shielding
C. Time
D. Collimation
Answer: C
Rationale: The time principle in radiation protection emphasizes
minimizing exposure duration to reduce dose.
6. Which of the following factors increases patient dose in radiography?
A. Decreasing mAs
B. Using higher kVp without appropriate filtration
C. Using a grid properly
D. Increasing distance from source
Answer: B
Rationale: High kVp without filtration increases patient dose due to
unnecessary low-energy photons.
7. What type of X-ray tube target material is commonly used for general
radiography?
A. Tungsten
B. Molybdenum
C. Copper
D. Aluminum
Answer: A
Rationale: Tungsten is commonly used in general radiography due to
its high atomic number and melting point.
, 8. In digital radiography, increasing the exposure index (EI) indicates:
A. Underexposure
B. Overexposure
C. Correct exposure
D. No effect on image quality
Answer: B
Rationale: A higher exposure index reflects increased radiation
reaching the detector, indicating overexposure.
9. Which of the following best describes spatial resolution in
radiography?
A. The amount of blackening on the image
B. The ability to distinguish small structures clearly
C. The total dose to the patient
D. The level of scatter radiation
Answer: B
Rationale: Spatial resolution refers to the sharpness and ability to
differentiate small structures on the image.
10. Which radiographic view best demonstrates the sternoclavicular
joint?
A. AP shoulder
B. Serendipity view
C. Lateral chest
D. Oblique cervical spine
Answer: B
Rationale: The Serendipity view is specifically designed to visualize
the sternoclavicular joint.
11. The exposure time in radiography is usually measured in:
A. Seconds
B. Milliseconds
C. Minutes
D. Microamperes
Answer: B
Rationale: Radiographic exposure time is often very short and
measured in milliseconds to control motion blur.
12. In fluoroscopy, the patient dose is highest during:
A. Pulsed fluoroscopy
B. Continuous fluoroscopy
