PrepIQ Arkansas AR Licensed Technologist
LTL Ultimate Exam Readiness Test
**Question 1.** Which principle of radiation protection emphasizes minimizing exposure time?
A) Distance
B) Shielding
C) Time
D) ALARA
Answer: C
Explanation: Reducing the time a person is exposed to radiation directly lowers the absorbed
dose.
**Question 2.** The ALARA principle stands for:
A) As Low As Reasonably Achievable
B) As Long As Radiation Allows
C) All Levels Are Regulated Adequately
D) None of the above
Answer: A
Explanation: ALARA mandates that radiation doses be kept as low as is reasonably possible,
considering economic and social factors.
**Question 3.** Which tissue is most radiosensitive?
A) Muscle
B) Bone
C) Lymphoid tissue
D) Skin
Answer: C
Explanation: Lymphoid tissues (e.g., bone marrow, spleen) have high mitotic rates and are highly
susceptible to ionizing radiation.
, PrepIQ Arkansas AR Licensed Technologist
LTL Ultimate Exam Readiness Test
**Question 4.** The annual occupational dose limit for whole‑body exposure to radiation for a
technologist is:
A) 5 mSv
B) 20 mSv
C) 50 mSv
D) 100 mSv
Answer: B
Explanation: OSHA and NRC set the limit at 20 millisieverts per year for occupational exposure.
**Question 5.** In X‑ray production, the primary interaction that creates useful diagnostic
photons is:
A) Photoelectric effect
B) Compton scattering
C) Pair production
D) Fluorescence
Answer: A
Explanation: The photoelectric effect results in the absorption of electrons and emission of
characteristic X‑rays used for imaging.
**Question 6.** Which component of an X‑ray system controls the high‑voltage output?
A) X‑ray tube
B) Generator
C) Collimator
D) Detector
Answer: B
, PrepIQ Arkansas AR Licensed Technologist
LTL Ultimate Exam Readiness Test
Explanation: The generator (or high‑voltage power supply) determines the kVp delivered to the
tube.
**Question 7.** Increasing kVp in a radiographic exposure primarily:
A) Increases image contrast
B) Decreases patient dose
C) Increases photon energy and penetrability
D) Reduces mAs required
Answer: C
Explanation: Higher kVp produces higher‑energy photons that penetrate tissues more readily,
affecting contrast and dose.
**Question 8.** The relationship between mAs and image density is:
A) Directly proportional
B) Inversely proportional
C) Unrelated
D) Exponential
Answer: A
Explanation: Doubling the mAs doubles the number of photons, increasing image density
proportionally.
**Question 9.** Which quality control test checks the uniformity of the X‑ray beam?
A) Timer accuracy
B) kVp reproducibility
C) Beam alignment (collimation) test
D) Detector calibration
, PrepIQ Arkansas AR Licensed Technologist
LTL Ultimate Exam Readiness Test
Answer: C
Explanation: Beam alignment ensures the X‑ray field is centered and uniform across the
exposure area.
**Question 10.** A common artifact caused by patient motion appears as:
A) Grid lines
B) Double exposure
C) Blurring of anatomy
D) Streaks from metal
Answer: C
Explanation: Motion smears the image, reducing sharpness and detail.
**Question 11.** The term “density” in radiography refers to:
A) The contrast between structures
B) The blackness (optical density) of the image
C) The spatial resolution
D) The amount of radiation used
Answer: B
Explanation: Density is a measure of how much light is absorbed by the film or detector,
appearing as blackness.
**Question 12.** In digital imaging, the “window level” adjustment primarily affects:
A) Spatial resolution
B) Image noise
C) Contrast and brightness
LTL Ultimate Exam Readiness Test
**Question 1.** Which principle of radiation protection emphasizes minimizing exposure time?
A) Distance
B) Shielding
C) Time
D) ALARA
Answer: C
Explanation: Reducing the time a person is exposed to radiation directly lowers the absorbed
dose.
**Question 2.** The ALARA principle stands for:
A) As Low As Reasonably Achievable
B) As Long As Radiation Allows
C) All Levels Are Regulated Adequately
D) None of the above
Answer: A
Explanation: ALARA mandates that radiation doses be kept as low as is reasonably possible,
considering economic and social factors.
**Question 3.** Which tissue is most radiosensitive?
A) Muscle
B) Bone
C) Lymphoid tissue
D) Skin
Answer: C
Explanation: Lymphoid tissues (e.g., bone marrow, spleen) have high mitotic rates and are highly
susceptible to ionizing radiation.
, PrepIQ Arkansas AR Licensed Technologist
LTL Ultimate Exam Readiness Test
**Question 4.** The annual occupational dose limit for whole‑body exposure to radiation for a
technologist is:
A) 5 mSv
B) 20 mSv
C) 50 mSv
D) 100 mSv
Answer: B
Explanation: OSHA and NRC set the limit at 20 millisieverts per year for occupational exposure.
**Question 5.** In X‑ray production, the primary interaction that creates useful diagnostic
photons is:
A) Photoelectric effect
B) Compton scattering
C) Pair production
D) Fluorescence
Answer: A
Explanation: The photoelectric effect results in the absorption of electrons and emission of
characteristic X‑rays used for imaging.
**Question 6.** Which component of an X‑ray system controls the high‑voltage output?
A) X‑ray tube
B) Generator
C) Collimator
D) Detector
Answer: B
, PrepIQ Arkansas AR Licensed Technologist
LTL Ultimate Exam Readiness Test
Explanation: The generator (or high‑voltage power supply) determines the kVp delivered to the
tube.
**Question 7.** Increasing kVp in a radiographic exposure primarily:
A) Increases image contrast
B) Decreases patient dose
C) Increases photon energy and penetrability
D) Reduces mAs required
Answer: C
Explanation: Higher kVp produces higher‑energy photons that penetrate tissues more readily,
affecting contrast and dose.
**Question 8.** The relationship between mAs and image density is:
A) Directly proportional
B) Inversely proportional
C) Unrelated
D) Exponential
Answer: A
Explanation: Doubling the mAs doubles the number of photons, increasing image density
proportionally.
**Question 9.** Which quality control test checks the uniformity of the X‑ray beam?
A) Timer accuracy
B) kVp reproducibility
C) Beam alignment (collimation) test
D) Detector calibration
, PrepIQ Arkansas AR Licensed Technologist
LTL Ultimate Exam Readiness Test
Answer: C
Explanation: Beam alignment ensures the X‑ray field is centered and uniform across the
exposure area.
**Question 10.** A common artifact caused by patient motion appears as:
A) Grid lines
B) Double exposure
C) Blurring of anatomy
D) Streaks from metal
Answer: C
Explanation: Motion smears the image, reducing sharpness and detail.
**Question 11.** The term “density” in radiography refers to:
A) The contrast between structures
B) The blackness (optical density) of the image
C) The spatial resolution
D) The amount of radiation used
Answer: B
Explanation: Density is a measure of how much light is absorbed by the film or detector,
appearing as blackness.
**Question 12.** In digital imaging, the “window level” adjustment primarily affects:
A) Spatial resolution
B) Image noise
C) Contrast and brightness
