Texas Radiologic Technologist
Licensing Exam With Actual Questions
& Verified Answers,Plus
Rationales/Expert Verified For
Guaranteed Pass Graded A+/2026
/Latest Update/Instant Download Pdf
1. The primary purpose of a grid in radiography is to:
A. Reduce patient exposure
B. Improve image contrast
C. Reduce motion blur
D. Increase tube output
B. Improve image contrast
Rationale: Grids absorb scatter radiation before it reaches the image
receptor, enhancing image contrast.
2. The half-life of a radioactive substance is the time it takes for:
A. The substance to decay completely
B. Half of the substance to decay
C. Its energy to be halved
D. The activity to double
B. Half of the substance to decay
Rationale: Half-life is the period in which half of the radioactive nuclei decay,
reducing its activity by 50%.
3. Which of the following is the most radiosensitive tissue?
A. Muscle
B. Bone
, C. Gonads
D. Nerve
C. Gonads
Rationale: Gonadal tissue is highly sensitive to radiation due to high mitotic
activity and reproductive importance.
4. The SI unit for absorbed dose of radiation is:
A. Gray (Gy)
B. Sievert (Sv)
C. Roentgen (R)
D. Curie (Ci)
A. Gray (Gy)
Rationale: Gray measures the absorbed radiation dose in tissue, defined as 1
joule/kg.
5. What is the most important factor in reducing patient dose in
fluoroscopy?
A. Increasing mA
B. Limiting exposure time
C. Using higher kVp
D. Reducing grid ratio
B. Limiting exposure time
Rationale: Fluoroscopy dose is directly proportional to exposure time;
minimizing time reduces dose significantly.
6. Which of the following cells is least radiosensitive?
A. Lymphocyte
B. Epithelial cells
C. Nerve cells
D. Spermatogonia
C. Nerve cells
Rationale: Nerve cells are highly specialized and mature, making them less
sensitive to radiation damage.
7. Compton scattering primarily affects:
A. Image contrast
, B. Tube lifespan
C. Patient skin dose only
D. Grid performance
A. Image contrast
Rationale: Compton scatter redirects photons, producing fog on the image
and reducing contrast.
8. Which factor affects the quantity of x-rays produced?
A. kVp
B. Filtration
C. mA and exposure time
D. Grid ratio
C. mA and exposure time
Rationale: Tube current (mA) and exposure time directly control the number
of electrons striking the anode, producing more x-rays.
9. Which radiographic projection best demonstrates the frontal sinuses?
A. Lateral
B. Waters
C. Caldwell
D. PA skull
C. Caldwell
Rationale: The Caldwell (PA axial) projection is angled to visualize the frontal
and ethmoid sinuses clearly.
10.The term "attenuation" in radiography refers to:
A. Increase in photon energy
B. Reduction in beam intensity
C. Scatter radiation production
D. Absorption by the grid
B. Reduction in beam intensity
Rationale: Attenuation is the reduction of x-ray intensity as it passes through
matter due to absorption and scatter.
11.The purpose of collimation is to:
A. Increase contrast
Licensing Exam With Actual Questions
& Verified Answers,Plus
Rationales/Expert Verified For
Guaranteed Pass Graded A+/2026
/Latest Update/Instant Download Pdf
1. The primary purpose of a grid in radiography is to:
A. Reduce patient exposure
B. Improve image contrast
C. Reduce motion blur
D. Increase tube output
B. Improve image contrast
Rationale: Grids absorb scatter radiation before it reaches the image
receptor, enhancing image contrast.
2. The half-life of a radioactive substance is the time it takes for:
A. The substance to decay completely
B. Half of the substance to decay
C. Its energy to be halved
D. The activity to double
B. Half of the substance to decay
Rationale: Half-life is the period in which half of the radioactive nuclei decay,
reducing its activity by 50%.
3. Which of the following is the most radiosensitive tissue?
A. Muscle
B. Bone
, C. Gonads
D. Nerve
C. Gonads
Rationale: Gonadal tissue is highly sensitive to radiation due to high mitotic
activity and reproductive importance.
4. The SI unit for absorbed dose of radiation is:
A. Gray (Gy)
B. Sievert (Sv)
C. Roentgen (R)
D. Curie (Ci)
A. Gray (Gy)
Rationale: Gray measures the absorbed radiation dose in tissue, defined as 1
joule/kg.
5. What is the most important factor in reducing patient dose in
fluoroscopy?
A. Increasing mA
B. Limiting exposure time
C. Using higher kVp
D. Reducing grid ratio
B. Limiting exposure time
Rationale: Fluoroscopy dose is directly proportional to exposure time;
minimizing time reduces dose significantly.
6. Which of the following cells is least radiosensitive?
A. Lymphocyte
B. Epithelial cells
C. Nerve cells
D. Spermatogonia
C. Nerve cells
Rationale: Nerve cells are highly specialized and mature, making them less
sensitive to radiation damage.
7. Compton scattering primarily affects:
A. Image contrast
, B. Tube lifespan
C. Patient skin dose only
D. Grid performance
A. Image contrast
Rationale: Compton scatter redirects photons, producing fog on the image
and reducing contrast.
8. Which factor affects the quantity of x-rays produced?
A. kVp
B. Filtration
C. mA and exposure time
D. Grid ratio
C. mA and exposure time
Rationale: Tube current (mA) and exposure time directly control the number
of electrons striking the anode, producing more x-rays.
9. Which radiographic projection best demonstrates the frontal sinuses?
A. Lateral
B. Waters
C. Caldwell
D. PA skull
C. Caldwell
Rationale: The Caldwell (PA axial) projection is angled to visualize the frontal
and ethmoid sinuses clearly.
10.The term "attenuation" in radiography refers to:
A. Increase in photon energy
B. Reduction in beam intensity
C. Scatter radiation production
D. Absorption by the grid
B. Reduction in beam intensity
Rationale: Attenuation is the reduction of x-ray intensity as it passes through
matter due to absorption and scatter.
11.The purpose of collimation is to:
A. Increase contrast
