MASSACHUSETTS RADIOLOGIC LICENSURE EXAM
QUESTIONS AND CORRECT ANSWERS (VERIFIED
ANSWERS) Q&A 2026 |INSTANT DOWNLOAD PDF
1. Which of the following best describes the primary
purpose of a grid in radiography?
A. Reduce patient dose
B. Reduce scatter radiation reaching the image receptor
C. Increase image magnification
D. Increase contrast by adjusting kVp
Correct answer: B
Rationale: Grids absorb scatter radiation before it reaches
the image receptor, improving image contrast.
2. What is the unit of radiation dose absorbed by tissue?
A. Roentgen (R)
B. Sievert (Sv)
C. Gray (Gy)
D. Curie (Ci)
Correct answer: C
Rationale: Gray measures absorbed dose (energy per
mass) in tissue; Sievert measures biological effect.
3. Which projection is typically used to visualize the lateral
view of the skull?
A. PA projection
B. AP projection
, C. Lateral projection
D. Oblique projection
Correct answer: C
Rationale: Lateral projection provides a side view of the
skull to evaluate cranial structures.
4. During fluoroscopy, what is the main factor that reduces
patient dose?
A. Increasing kVp
B. Using a small focal spot
C. Collimating the beam
D. Increasing exposure time
Correct answer: C
Rationale: Collimation limits the radiation field size,
reducing patient dose.
5. Which of the following describes the photoelectric
effect?
A. Photon is deflected without energy loss
B. Photon is absorbed, ejecting an inner-shell electron
C. Photon loses partial energy and changes direction
D. Photon passes through tissue without interaction
Correct answer: B
Rationale: Photoelectric effect occurs when a photon
ejects an inner-shell electron, depositing all energy locally.
6. What is the most radiosensitive cell type?
A. Nerve cells
B. Muscle cells
, C. Epithelial cells
D. Osteocytes
Correct answer: C
Rationale: Epithelial cells divide frequently, making them
more sensitive to ionizing radiation.
7. Which grid ratio will best reduce scatter?
A. 5:1
B. 8:1
C. 12:1
D. 6:1
Correct answer: C
Rationale: Higher grid ratios (12:1) are more effective in
absorbing scatter radiation.
8. ALARA principle in radiography means:
A. Always limit x-ray tube current
B. As Low As Reasonably Achievable
C. Avoid linear attenuation radiation
D. Adjust lead shielding accordingly
Correct answer: B
Rationale: ALARA focuses on minimizing radiation dose
while achieving diagnostic quality.
9. The primary source of scatter radiation in diagnostic
imaging is:
A. The patient
B. The x-ray tube
C. The image receptor
, D. The surrounding environment
Correct answer: A
Rationale: Scatter is mainly produced when x-rays interact
with patient tissues.
10. Which of the following materials is commonly used
for protective aprons in radiology?
A. Aluminum
B. Lead
C. Copper
D. Tungsten
Correct answer: B
Rationale: Lead shields absorb scatter and primary
radiation effectively.
11. What type of imaging uses high-frequency sound
waves?
A. MRI
B. CT
C. Ultrasound
D. Fluoroscopy
Correct answer: C
Rationale: Ultrasound uses high-frequency sound waves,
not ionizing radiation, to create images.
12. Which factor primarily controls radiographic
density?
A. kVp
B. mAs
QUESTIONS AND CORRECT ANSWERS (VERIFIED
ANSWERS) Q&A 2026 |INSTANT DOWNLOAD PDF
1. Which of the following best describes the primary
purpose of a grid in radiography?
A. Reduce patient dose
B. Reduce scatter radiation reaching the image receptor
C. Increase image magnification
D. Increase contrast by adjusting kVp
Correct answer: B
Rationale: Grids absorb scatter radiation before it reaches
the image receptor, improving image contrast.
2. What is the unit of radiation dose absorbed by tissue?
A. Roentgen (R)
B. Sievert (Sv)
C. Gray (Gy)
D. Curie (Ci)
Correct answer: C
Rationale: Gray measures absorbed dose (energy per
mass) in tissue; Sievert measures biological effect.
3. Which projection is typically used to visualize the lateral
view of the skull?
A. PA projection
B. AP projection
, C. Lateral projection
D. Oblique projection
Correct answer: C
Rationale: Lateral projection provides a side view of the
skull to evaluate cranial structures.
4. During fluoroscopy, what is the main factor that reduces
patient dose?
A. Increasing kVp
B. Using a small focal spot
C. Collimating the beam
D. Increasing exposure time
Correct answer: C
Rationale: Collimation limits the radiation field size,
reducing patient dose.
5. Which of the following describes the photoelectric
effect?
A. Photon is deflected without energy loss
B. Photon is absorbed, ejecting an inner-shell electron
C. Photon loses partial energy and changes direction
D. Photon passes through tissue without interaction
Correct answer: B
Rationale: Photoelectric effect occurs when a photon
ejects an inner-shell electron, depositing all energy locally.
6. What is the most radiosensitive cell type?
A. Nerve cells
B. Muscle cells
, C. Epithelial cells
D. Osteocytes
Correct answer: C
Rationale: Epithelial cells divide frequently, making them
more sensitive to ionizing radiation.
7. Which grid ratio will best reduce scatter?
A. 5:1
B. 8:1
C. 12:1
D. 6:1
Correct answer: C
Rationale: Higher grid ratios (12:1) are more effective in
absorbing scatter radiation.
8. ALARA principle in radiography means:
A. Always limit x-ray tube current
B. As Low As Reasonably Achievable
C. Avoid linear attenuation radiation
D. Adjust lead shielding accordingly
Correct answer: B
Rationale: ALARA focuses on minimizing radiation dose
while achieving diagnostic quality.
9. The primary source of scatter radiation in diagnostic
imaging is:
A. The patient
B. The x-ray tube
C. The image receptor
, D. The surrounding environment
Correct answer: A
Rationale: Scatter is mainly produced when x-rays interact
with patient tissues.
10. Which of the following materials is commonly used
for protective aprons in radiology?
A. Aluminum
B. Lead
C. Copper
D. Tungsten
Correct answer: B
Rationale: Lead shields absorb scatter and primary
radiation effectively.
11. What type of imaging uses high-frequency sound
waves?
A. MRI
B. CT
C. Ultrasound
D. Fluoroscopy
Correct answer: C
Rationale: Ultrasound uses high-frequency sound waves,
not ionizing radiation, to create images.
12. Which factor primarily controls radiographic
density?
A. kVp
B. mAs
