CALIFORNIA CERTIFIED RADIOLOGIC TECHNOLOGIST
EXAMINATION NEWEST REAL EXAM QUESTIONS AND
CORRECT DETAILED ANSWERS WITH RATIONALES
LATEST UPDATES 2026-2027 (100% VERIFIED ANSWERS)
ALREADY GRADED A+
Question 1
Which of the following is the most effective method to reduce patient dose during a
radiographic examination of the lumbar spine?
A) Use of a high grid ratio
B) Increase in source-to-image distance (SID)
C) Accurate collimation to the area of interest
D) Decrease in kVp
Answer: C
Rationale: Accurate collimation reduces the volume of tissue irradiated, which lowers patient
dose and reduces scatter radiation. A high grid ratio (A) increases patient dose because it
requires higher mAs. Increasing SID (B) has minimal effect on dose unless other factors are
changed, and decreasing kVp (D) would require an increase in mAs, potentially raising skin
dose. Collimation is the primary tool for dose limitation.
Question 2
When performing a portable chest radiograph on a patient in isolation with contact
precautions, the radiographer should:
A) Wear sterile gloves during the entire procedure
B) Place the cassette in a protective bag, wear gloves and gown, and disinfect the equipment
after use
C) Use the patient’s gown to cover the x-ray tube
D) Omit the use of a grid to reduce contact with the patient
,Answer: B
Rationale: Contact precautions require the radiographer to don gloves and gown to prevent
transmission of microorganisms. The cassette should be protected with a clean (or sterile, per
policy) cover, and all equipment must be disinfected after the procedure. Wearing sterile
gloves (A) is for sterile procedures, not contact isolation. The tube should not be covered with
a patient’s gown (C), and omitting the grid (D) compromises image quality without a valid
infection-control reason.
Question 3
Which of the following technical changes would increase the optical density on a radiographic
image when using automatic exposure control (AEC)?
A) Decreasing the backup timer
B) Decreasing the kVp
C) Increasing the AEC sensitivity setting (+ density control)
D) Using a smaller focal spot
Answer: C
Rationale: The AEC density control allows the radiographer to increase or decrease the
exposure relative to the calibrated detector. A positive (+) setting results in more radiation
exposure reaching the image receptor, increasing density. Decreasing kVp (B) would reduce
density for a given AEC setting. The backup timer (A) limits total exposure but does not
directly increase density. Focal spot size (D) affects spatial resolution, not density.
Question 4
Which of the following projections best demonstrates the left zygapophyseal joints of the
cervical spine?
A) Anteroposterior (AP) axial
B) Lateral
C) Right posterior oblique (RPO)
D) Left posterior oblique (LPO)
Answer: C
Rationale: The zygapophyseal joints (intervertebral facet joints) of the cervical spine are
visualized by obliquing the patient. The side of interest is the one farther from the image
,receptor; thus, the left joints are demonstrated with a right posterior oblique (RPO) or left
anterior oblique (LAO) projection. Left posterior oblique (LPO) would show the right joints.
Question 5
The primary purpose of beam filtration in a diagnostic x-ray tube is to:
A) Reduce exposure time
B) Increase contrast by removing low-energy photons that do not contribute to the image
C) Decrease patient skin dose by absorbing low-energy x-rays
D) Allow the tube to operate at higher mA
Answer: C
Rationale: Filtration (inherent plus added) removes low-energy x-ray photons that would
otherwise be absorbed by the patient’s skin and superficial tissues, thereby reducing patient
dose without significantly affecting image quality. While it can indirectly affect contrast by
hardening the beam, the primary regulatory and safety purpose is dose reduction.
Question 6
The condition in which the spinal column has an abnormal lateral curvature is called:
A) Kyphosis
B) Lordosis
C) Scoliosis
D) Spondylolisthesis
Answer: C
Rationale: Scoliosis is a lateral curvature of the spine. Kyphosis (A) is an exaggerated thoracic
curvature (humpback). Lordosis (B) is an exaggerated lumbar curvature (swayback).
Spondylolisthesis (D) is the forward slippage of one vertebra on another.
Question 7
Which of the following radiation protection measures is mandated by the California Radiation
Control Regulations (Title 17) for a radiographer?
A) Wearing a lead apron only when performing fluoroscopy
B) Standing at least 2 meters from the x-ray source during exposures
, C) Wearing a personnel dosimeter whenever occupational exposure is possible
D) Using a gonadal shield on all patients regardless of age
Answer: C
Rationale: California regulations require that individuals who may receive occupational
radiation doses wear a personnel monitoring device (dosimeter) to track exposure. Lead
aprons are required for fluoroscopy and certain procedures but are not the only measure.
Standing at a specific distance alone does not guarantee safety without dosimetry. Gonadal
shielding (D) is recommended when the gonads are in the primary beam and it does not
interfere with diagnostic information, but it is not an absolute mandate for every patient.
Question 8
Which of the following interactions between x-rays and matter primarily accounts for the
production of scattered radiation in diagnostic radiography?
A) Photoelectric effect
B) Compton scattering
C) Coherent scattering
D) Pair production
Answer: B
Rationale: Compton scattering is the dominant interaction at diagnostic energies (kVp). It
results in a recoil electron and a scattered photon of lower energy, which degrades image
contrast. The photoelectric effect (A) contributes to patient dose and image contrast but does
not produce scatter in the same way. Coherent scattering (C) is negligible, and pair production
(D) requires energies above 1.02 MeV.
Question 9
An automatic exposure control (AEC) device that has a minimum response time may cause:
A) Overexposure of thin patients
B) Underexposure of thick body parts
C) Inconsistent film-screen contact
D) Excessive tube cooling time
Answer: A
Rationale: The minimum response time is the shortest exposure the AEC can terminate. In very
thin patients or high-speed systems, the required exposure may be shorter than this
EXAMINATION NEWEST REAL EXAM QUESTIONS AND
CORRECT DETAILED ANSWERS WITH RATIONALES
LATEST UPDATES 2026-2027 (100% VERIFIED ANSWERS)
ALREADY GRADED A+
Question 1
Which of the following is the most effective method to reduce patient dose during a
radiographic examination of the lumbar spine?
A) Use of a high grid ratio
B) Increase in source-to-image distance (SID)
C) Accurate collimation to the area of interest
D) Decrease in kVp
Answer: C
Rationale: Accurate collimation reduces the volume of tissue irradiated, which lowers patient
dose and reduces scatter radiation. A high grid ratio (A) increases patient dose because it
requires higher mAs. Increasing SID (B) has minimal effect on dose unless other factors are
changed, and decreasing kVp (D) would require an increase in mAs, potentially raising skin
dose. Collimation is the primary tool for dose limitation.
Question 2
When performing a portable chest radiograph on a patient in isolation with contact
precautions, the radiographer should:
A) Wear sterile gloves during the entire procedure
B) Place the cassette in a protective bag, wear gloves and gown, and disinfect the equipment
after use
C) Use the patient’s gown to cover the x-ray tube
D) Omit the use of a grid to reduce contact with the patient
,Answer: B
Rationale: Contact precautions require the radiographer to don gloves and gown to prevent
transmission of microorganisms. The cassette should be protected with a clean (or sterile, per
policy) cover, and all equipment must be disinfected after the procedure. Wearing sterile
gloves (A) is for sterile procedures, not contact isolation. The tube should not be covered with
a patient’s gown (C), and omitting the grid (D) compromises image quality without a valid
infection-control reason.
Question 3
Which of the following technical changes would increase the optical density on a radiographic
image when using automatic exposure control (AEC)?
A) Decreasing the backup timer
B) Decreasing the kVp
C) Increasing the AEC sensitivity setting (+ density control)
D) Using a smaller focal spot
Answer: C
Rationale: The AEC density control allows the radiographer to increase or decrease the
exposure relative to the calibrated detector. A positive (+) setting results in more radiation
exposure reaching the image receptor, increasing density. Decreasing kVp (B) would reduce
density for a given AEC setting. The backup timer (A) limits total exposure but does not
directly increase density. Focal spot size (D) affects spatial resolution, not density.
Question 4
Which of the following projections best demonstrates the left zygapophyseal joints of the
cervical spine?
A) Anteroposterior (AP) axial
B) Lateral
C) Right posterior oblique (RPO)
D) Left posterior oblique (LPO)
Answer: C
Rationale: The zygapophyseal joints (intervertebral facet joints) of the cervical spine are
visualized by obliquing the patient. The side of interest is the one farther from the image
,receptor; thus, the left joints are demonstrated with a right posterior oblique (RPO) or left
anterior oblique (LAO) projection. Left posterior oblique (LPO) would show the right joints.
Question 5
The primary purpose of beam filtration in a diagnostic x-ray tube is to:
A) Reduce exposure time
B) Increase contrast by removing low-energy photons that do not contribute to the image
C) Decrease patient skin dose by absorbing low-energy x-rays
D) Allow the tube to operate at higher mA
Answer: C
Rationale: Filtration (inherent plus added) removes low-energy x-ray photons that would
otherwise be absorbed by the patient’s skin and superficial tissues, thereby reducing patient
dose without significantly affecting image quality. While it can indirectly affect contrast by
hardening the beam, the primary regulatory and safety purpose is dose reduction.
Question 6
The condition in which the spinal column has an abnormal lateral curvature is called:
A) Kyphosis
B) Lordosis
C) Scoliosis
D) Spondylolisthesis
Answer: C
Rationale: Scoliosis is a lateral curvature of the spine. Kyphosis (A) is an exaggerated thoracic
curvature (humpback). Lordosis (B) is an exaggerated lumbar curvature (swayback).
Spondylolisthesis (D) is the forward slippage of one vertebra on another.
Question 7
Which of the following radiation protection measures is mandated by the California Radiation
Control Regulations (Title 17) for a radiographer?
A) Wearing a lead apron only when performing fluoroscopy
B) Standing at least 2 meters from the x-ray source during exposures
, C) Wearing a personnel dosimeter whenever occupational exposure is possible
D) Using a gonadal shield on all patients regardless of age
Answer: C
Rationale: California regulations require that individuals who may receive occupational
radiation doses wear a personnel monitoring device (dosimeter) to track exposure. Lead
aprons are required for fluoroscopy and certain procedures but are not the only measure.
Standing at a specific distance alone does not guarantee safety without dosimetry. Gonadal
shielding (D) is recommended when the gonads are in the primary beam and it does not
interfere with diagnostic information, but it is not an absolute mandate for every patient.
Question 8
Which of the following interactions between x-rays and matter primarily accounts for the
production of scattered radiation in diagnostic radiography?
A) Photoelectric effect
B) Compton scattering
C) Coherent scattering
D) Pair production
Answer: B
Rationale: Compton scattering is the dominant interaction at diagnostic energies (kVp). It
results in a recoil electron and a scattered photon of lower energy, which degrades image
contrast. The photoelectric effect (A) contributes to patient dose and image contrast but does
not produce scatter in the same way. Coherent scattering (C) is negligible, and pair production
(D) requires energies above 1.02 MeV.
Question 9
An automatic exposure control (AEC) device that has a minimum response time may cause:
A) Overexposure of thin patients
B) Underexposure of thick body parts
C) Inconsistent film-screen contact
D) Excessive tube cooling time
Answer: A
Rationale: The minimum response time is the shortest exposure the AEC can terminate. In very
thin patients or high-speed systems, the required exposure may be shorter than this
