Radiation Health and Safety Test Cheat Sheet 2026

The 30 highest-yield Radiation Health and Safety Test facts, distilled from real exam questions. Print it, save it as a PDF, or study it here — free, no sign-up.

1. Radiation-induced skin erythema following a high acute dose to the skin is an example of which type of radiation effect? → Deterministic tissue reaction with a threshold
2. Compared with D-speed film, F-speed film requires: → Less exposure
3. Premedication to prevent a repeat contrast reaction typically includes: → A corticosteroid plus an antihistamine
4. What shielding approach is used in a fluoroscopy suite's protective apron primarily to protect against? → Scattered radiation from the patient
5. Which recommended distance and position protects the operator from scatter during exposure? → At least 6 feet away at 90 to 135 degrees to the beam, or behind a barrier
6. Which statistic describes how spread out individual measurements are around the mean? → Standard deviation
7. A confounding variable is one that is: → Associated with both the exposure and the outcome
8. A patient arrives with severe bleeding and external radioactive contamination. What is the correct priority? → Stabilize life-threatening injuries first, then decontaminate
9. The primary role of an institutional review board (IRB) is to: → Protect the rights and welfare of human research subjects
10. A somatic mutation caused by radiation exposure would most directly affect: → The exposed individual only
11. Which interaction is the predominant photon interaction at diagnostic X-ray energies (20–100 keV)? → Compton scattering
12. Which test is the gold standard for biodosimetry of radiation exposure? → Dicentric chromosome assay
13. Which identifying information must be on a radiograph or its digital file? → The patient's name and date of exposure
14. Exposed film packets contaminated with saliva should be handled by: → Wiping with disinfectant or removing barrier envelopes with clean gloves
15. The relative biological effectiveness (RBE) compares the biological damage of a test radiation to that of: → 250 kVp X-rays as the reference radiation
16. What is the recommended approach for reducing the biological half-life of internal tritium (tritiated water) contamination? → Increase fluid intake to promote diuresis
17. What is the MOST important consideration when applying research methods & evidence-based practice in Radiation Health and Safety? → Following established protocols while adapting to specific circumstances
18. What is meant by 'secular equilibrium' in a radioactive decay series? → Daughter activity equals parent activity after many daughter half-lives have passed
19. What is the annual occupational whole-body effective dose limit in the US? → 50 mSv
20. How should an error in a paper patient chart be corrected? → Draw a single line through it, then initial and date the correction
21. A herringbone (tire-track) pattern on an exposed film indicates what? → Film was placed backward
22. Barium sulfate is contraindicated when which condition is suspected? → Gastrointestinal perforation
23. Which of the following best describes 'res ipsa loquitur'? → The thing speaks for itself
24. Filgrastim (G-CSF) is used in hematopoietic acute radiation syndrome primarily to: → Stimulate neutrophil production
25. What is the primary source of natural background radiation exposure for most Americans? → Radon gas
26. Personnel monitoring records, such as dosimeter reports, should be handled how? → Kept as permanent or long-term records and made available to the worker
27. The radiograph that shows the entire tooth, including the crown, roots, and jawline, is known as: → Periapical x-ray
28. If a rescuer doubles their distance from a point source of gamma radiation, the exposure rate becomes: → One-quarter
29. What is the PRIMARY objective of infection control & prevention within the Radiation Health and Safety profession? → To ensure quality outcomes through standardized practices and continuous improvement
30. When should clinical assessment & patient care be conducted in Radiation Health and Safety? → At regular intervals and whenever significant changes occur