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CHP Cheat Sheet 2026

The 30 highest-yield CHP facts, distilled from real exam questions. Print it, save it as a PDF, or study it here โ€” free, no sign-up.

150 questions
240 min time limit
70% to pass
  1. Which documentation practice is most important for evidence-based practice & research methods in the CHP field? โ†’ Maintaining complete, accurate, and timely records
  2. Which US federal agency has primary regulatory authority over the transportation of radioactive materials by road, rail, and air within the US? โ†’ DOT/PHMSA (Department of Transportation)
  3. Which quality improvement method is most applicable to evidence-based practice & research methods in Certified Health Physicist? โ†’ Plan-Do-Check-Act (PDCA) continuous improvement cycle
  4. What is the significance of peer review in evidence-based practice & research methods for CHP professionals? โ†’ It promotes accountability, knowledge sharing, and quality improvement
  5. For a controlled area adjacent to a fluoroscopy suite, NCRP 151 recommends a design goal (P) of: โ†’ 0.1 mSv/week
  6. What ethical consideration is most relevant to evidence-based practice & research methods in CHP practice? โ†’ Maintaining confidentiality and acting in the best interest of stakeholders
  7. Streaming of radiation through a penetration (duct or pipe) in a shield is most effectively reduced by: โ†’ Using a stepped or offset duct design to eliminate line-of-sight through the penetration
  8. What is the Ingestion Pathway Emergency Planning Zone (EPZ) radius required for nuclear power plants? โ†’ 50 miles
  9. What is the definition of a Type B shipping package for radioactive materials? โ†’ A package designed and tested to retain contents under severe accident conditions
  10. What is the half-value layer (HVL) defined as? โ†’ The thickness of material that reduces radiation intensity by one-half
  11. For a point isotropic gamma source in air, if the distance from the source doubles, the dose rate changes by a factor of: โ†’ Decreases by factor of 4
  12. What is the most appropriate shielding material for high-energy gamma rays emitted by radionuclides such as Co-60? โ†’ Lead or dense concrete
  13. How should a CHP professional handle a situation where communication & interprofessional collaboration protocols conflict with practical constraints? โ†’ Document the conflict and seek guidance from appropriate authorities
  14. What is the primary purpose of quality assurance & performance improvement in the context of Certified Health Physicist? โ†’ To ensure consistent quality and professional accountability
  15. Which technology trend is most likely to impact quality assurance & performance improvement in the CHP field in coming years? โ†’ Digital tools for enhanced data collection, analysis, and reporting
  16. In NCRP 151 shielding calculations for diagnostic X-ray rooms, the 'use factor' (U) accounts for: โ†’ The fraction of the workload during which the primary beam is directed at a given wall
  17. In a multi-layer shield composed of different materials, what is the correct approach to calculate total shielding? โ†’ Multiply the individual transmission factors for each layer
  18. Which solution is most commonly recommended as the primary agent for skin decontamination of radioactive materials? โ†’ Mild soap and lukewarm water
  19. What is a common challenge professionals face when applying evidence-based practice & research methods principles in Certified Health Physicist? โ†’ Balancing theoretical knowledge with practical application
  20. What is the primary radiation hazard posed by a Radiological Dispersal Device (RDD or 'dirty bomb')? โ†’ Widespread contamination requiring cleanup and potential inhalation hazard
  21. What is the primary purpose of communication & interprofessional collaboration in the context of Certified Health Physicist? โ†’ To ensure consistent quality and professional accountability
  22. The linear attenuation coefficient (ฮผ) for photons in a material has units of: โ†’ cmโปยน
  23. According to NRC regulations, what is the Plume Exposure Pathway Emergency Planning Zone (EPZ) radius for nuclear power plants? โ†’ 10 miles
  24. What is the primary purpose of professional ethics & legal compliance in the context of Certified Health Physicist? โ†’ To ensure consistent quality and professional accountability
  25. Which technology trend is most likely to impact communication & interprofessional collaboration in the CHP field in coming years? โ†’ Digital tools for enhanced data collection, analysis, and reporting
  26. Which chelating agent is the treatment of choice to enhance elimination of plutonium and other transuranic radionuclides after internal contamination? โ†’ DTPA (diethylenetriaminepentaacetic acid)
  27. Which quality improvement method is most applicable to quality assurance & performance improvement in Certified Health Physicist? โ†’ Plan-Do-Check-Act (PDCA) continuous improvement cycle
  28. Which of the following best describes a key competency required for quality assurance & performance improvement in CHP certification? โ†’ Critical thinking and evidence-based decision making
  29. In the initial response to a suspected RDD incident, what should be the first responder's top priority? โ†’ Life safety โ€” treat injured and secure a perimeter
  30. What is the primary purpose of administering potassium iodide (KI) during a radiological emergency? โ†’ Block thyroid uptake of radioactive iodine-131
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