TEXAS RADIOLOGIC TECHNOLOGIST LICENSING EXAM
PRACTICE TEST QUESTIONS AND CORRECT ANSWERS
(VERIFIED ANSWERS) PLUS RATIONALES 2026 Q&A | INSTANT
DOWNLOAD PDF
1. Which of the following is the unit of absorbed dose in tissue?
A. Roentgen
B. Curie
C. Gray (Gy)
D. Becquerel
Rationale: Gray (Gy) measures the amount of radiation energy
absorbed per kilogram of tissue, replacing the older rad unit.
2. What is the primary purpose of collimation in radiography?
A. Reduce exposure time
B. Improve image resolution
C. Limit patient exposure and scatter radiation
D. Increase contrast
Rationale: Collimation restricts the x-ray beam to the area of interest,
reducing patient dose and scatter radiation.
3. The best method to reduce patient motion blur is to:
A. Increase mAs
B. Use a shorter exposure time
C. Use a larger focal spot
,D. Increase kVp
Rationale: Shorter exposure times reduce motion artifacts caused by
patient movement.
4. The annual effective dose limit for a radiologic technologist is:
A. 10 mSv
B. 25 mSv
C. 50 mSv
D. 100 mSv
Rationale: According to NCRP guidelines, occupational dose should not
exceed 50 mSv per year.
5. The lead apron used in fluoroscopy must have a minimum lead
equivalence of:
A. 0.25 mm Pb
B. 0.5 mm Pb
C. 1.0 mm Pb
D. 0.35 mm Pb
Rationale: Fluoroscopy procedures produce continuous radiation, so
0.5 mm Pb equivalence offers adequate protection.
6. Which component of the x-ray tube is responsible for focusing
electrons?
A. Anode
B. Target
,C. Focusing cup
D. Rotor
Rationale: The focusing cup directs electrons from the filament toward
the focal spot on the anode.
7. The quality of the x-ray beam is primarily controlled by:
A. kVp
B. mA
C. Exposure time
D. Filtration
Rationale: kVp controls the energy and penetrating ability of the x-ray
beam, determining image contrast and beam quality.
8. The quantity of x-rays produced is controlled by:
A. kVp
B. mAs
C. Filtration
D. SID
Rationale: mAs determines the total number of x-rays produced,
directly affecting image density.
9. Which of the following tissues is most radiosensitive?
A. Nerve tissue
B. Bone marrow
C. Muscle
, D. Bone
Rationale: Bone marrow contains rapidly dividing cells, making it
highly sensitive to ionizing radiation.
10. The purpose of a grid in radiography is to:
A. Reduce exposure time
B. Decrease image resolution
C. Reduce scatter and improve contrast
D. Increase brightness
Rationale: Grids absorb scattered radiation before it reaches the
image receptor, enhancing image contrast.
11. The x-ray tube current is measured in:
A. Volts
B. Coulombs
C. Milliamperes (mA)
D. Kiloelectron volts (keV)
Rationale: mA measures the flow of electrons across the x-ray tube,
determining x-ray quantity.
12. What effect does increasing SID have on image density?
A. Increases density
B. Decreases density
C. No effect
D. Increases scatter
PRACTICE TEST QUESTIONS AND CORRECT ANSWERS
(VERIFIED ANSWERS) PLUS RATIONALES 2026 Q&A | INSTANT
DOWNLOAD PDF
1. Which of the following is the unit of absorbed dose in tissue?
A. Roentgen
B. Curie
C. Gray (Gy)
D. Becquerel
Rationale: Gray (Gy) measures the amount of radiation energy
absorbed per kilogram of tissue, replacing the older rad unit.
2. What is the primary purpose of collimation in radiography?
A. Reduce exposure time
B. Improve image resolution
C. Limit patient exposure and scatter radiation
D. Increase contrast
Rationale: Collimation restricts the x-ray beam to the area of interest,
reducing patient dose and scatter radiation.
3. The best method to reduce patient motion blur is to:
A. Increase mAs
B. Use a shorter exposure time
C. Use a larger focal spot
,D. Increase kVp
Rationale: Shorter exposure times reduce motion artifacts caused by
patient movement.
4. The annual effective dose limit for a radiologic technologist is:
A. 10 mSv
B. 25 mSv
C. 50 mSv
D. 100 mSv
Rationale: According to NCRP guidelines, occupational dose should not
exceed 50 mSv per year.
5. The lead apron used in fluoroscopy must have a minimum lead
equivalence of:
A. 0.25 mm Pb
B. 0.5 mm Pb
C. 1.0 mm Pb
D. 0.35 mm Pb
Rationale: Fluoroscopy procedures produce continuous radiation, so
0.5 mm Pb equivalence offers adequate protection.
6. Which component of the x-ray tube is responsible for focusing
electrons?
A. Anode
B. Target
,C. Focusing cup
D. Rotor
Rationale: The focusing cup directs electrons from the filament toward
the focal spot on the anode.
7. The quality of the x-ray beam is primarily controlled by:
A. kVp
B. mA
C. Exposure time
D. Filtration
Rationale: kVp controls the energy and penetrating ability of the x-ray
beam, determining image contrast and beam quality.
8. The quantity of x-rays produced is controlled by:
A. kVp
B. mAs
C. Filtration
D. SID
Rationale: mAs determines the total number of x-rays produced,
directly affecting image density.
9. Which of the following tissues is most radiosensitive?
A. Nerve tissue
B. Bone marrow
C. Muscle
, D. Bone
Rationale: Bone marrow contains rapidly dividing cells, making it
highly sensitive to ionizing radiation.
10. The purpose of a grid in radiography is to:
A. Reduce exposure time
B. Decrease image resolution
C. Reduce scatter and improve contrast
D. Increase brightness
Rationale: Grids absorb scattered radiation before it reaches the
image receptor, enhancing image contrast.
11. The x-ray tube current is measured in:
A. Volts
B. Coulombs
C. Milliamperes (mA)
D. Kiloelectron volts (keV)
Rationale: mA measures the flow of electrons across the x-ray tube,
determining x-ray quantity.
12. What effect does increasing SID have on image density?
A. Increases density
B. Decreases density
C. No effect
D. Increases scatter
