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Free Practice Questions for PRC RadTech

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Exam Review

Key Facts: PRC RadTech Exam

5

official PRC subjects

PRC 2023 enhanced TOS

500

total exam items across five 100-item subjects

PRC 2023 enhanced TOS

20%

weight of each subject

PRC 2023 enhanced TOS and latest public PRC program

75%

minimum weighted average required to pass

RA 7431

P900

complete examination fee

PRC List of Requirements

Dec 10-11, 2026

scheduled 2026 exam dates

PRC 2026 Schedule of Licensure Examinations

59.49%

December 2025 pass rate

PRC result notice: 2,629 of 4,419

Prepare for the PRC RadTech exam as five equal 100-item subjects under the 2023 enhanced TOS. The official passing rule under RA 7431 is a weighted average of at least 75% with no subject below 60%. PRC's 2026 schedule lists the exam on December 10 and 11, 2026, with filing from September 11 to November 10, 2026; detailed 2026 program session times were not published in the official sources reviewed, so timing remains metadata pending.

Sample PRC RadTech Practice Questions

Try these sample questions to review concepts for the PRC RadTech exam. Each question includes a detailed explanation. Start the interactive quiz above for the full 125+ question experience with AI tutoring.

1Which pair of interactions accounts for most diagnostic x-ray attenuation in soft tissue at typical radiographic energies?
A.Pair production at routine diagnostic photon energies
B.Photoelectric absorption and Compton scatter
C.Coherent scatter and pair production
D.Compton scatter and photodisintegration
Explanation: Diagnostic x-ray attenuation in the patient is dominated by photoelectric absorption and Compton scatter. Photoelectric interactions contribute image contrast, while Compton interactions add scatter and reduce contrast.
2What is the main purpose of added filtration in a diagnostic x-ray tube housing?
A.To remove low-energy photons that would be absorbed by the patient
B.To increase the number of low-energy photons reaching the skin
C.To make the focal spot smaller
D.To convert x-rays into visible light
Explanation: Added filtration hardens the beam by removing low-energy photons that add skin dose without improving the image. The remaining beam has higher average energy and better penetrating ability.
3Which generator component steps up voltage so electrons can be accelerated across the x-ray tube?
A.Autotransformer
B.Step-up transformer
C.High-voltage rectifier assembly
D.Filament step-down transformer
Explanation: The step-up transformer increases voltage to the kilovoltage range needed to accelerate electrons from cathode to anode. Higher kVp increases beam energy and penetration.
4Which radiation protection principle means keeping exposure as low as reasonably achievable while still obtaining diagnostic information?
A.ALARA
B.Inverse imaging
C.Heel effect
D.Pinhole geometry
Explanation: ALARA is the core radiation protection principle for reducing unnecessary exposure while preserving diagnostic value. It is applied through justification, optimization, shielding, collimation, and appropriate technical factors.
5Which unit is commonly used to express absorbed radiation dose?
A.Gray
B.Becquerel
C.Candela
D.Tesla
Explanation: The gray is the SI unit of absorbed dose and equals one joule of energy deposited per kilogram of matter. It describes energy absorption, not biological weighting or activity.
6An x-ray tube operates at 80 kVp. What is the maximum possible energy of a bremsstrahlung photon in the emitted spectrum?
A.40 keV
B.80 keV
C.160 keV
D.80 mAs
Explanation: The maximum bremsstrahlung photon energy in keV is numerically equal to the tube potential in kVp. At 80 kVp, one projectile electron can lose at most 80 keV in a single interaction, so the spectrum endpoint is 80 keV.
7If the frequency of an x-ray photon doubles in vacuum, how do its energy and wavelength change?
A.Energy halves and wavelength doubles
B.Energy and wavelength both double
C.Energy doubles and wavelength halves
D.Energy and wavelength remain unchanged
Explanation: Photon energy is E = hf, so doubling frequency doubles energy. Because c = f times wavelength in vacuum, wavelength must decrease to one half when frequency doubles.
8A chest radiograph is repeated because the image was too light on a film-screen system. If kVp remains unchanged, which change is most likely to increase film density?
A.Decrease mAs
B.Increase mAs
C.Increase SID without compensation
D.Use a slower image receptor without compensation
Explanation: On film-screen imaging, mAs is the primary controller of receptor exposure and film density. Increasing mAs increases the number of x-ray photons reaching the receptor.
9Which x-ray tube problem is most directly reduced by using a rotating anode instead of a stationary anode?
A.Excessive heat concentration at one focal track point
B.Filament evaporation caused by prolonged high filament current
C.Space-charge limitation of electron flow at low tube voltage
D.The anode heel effect caused by absorption within the target
Explanation: A rotating anode spreads heat over a larger focal track, allowing higher tube loading than a stationary target. This helps protect the target from pitting and thermal damage.
10During which phases of the cell cycle are mammalian cells generally most radiosensitive?
A.Late S phase only
B.Mitosis and G2
C.G0 only
D.All phases are equally radiosensitive
Explanation: Cells are generally most radiosensitive during mitosis and G2, when chromosome damage is especially likely to interfere with successful division. Late S phase is comparatively radioresistant.

About the PRC RadTech Practice Questions

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