Health Physics (PMT 102A) Practice Test

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• Which set lists the three primary interaction mechanisms for diagnostic-energy photons in matter?
• What is the primary purpose of a contamination survey?
• The Linear No-Threshold (LNT) model makes which key assertion about risk?
• Who discovered electromagnetic radiation commonly known as X-Rays?
• If absorbed dose D = 2 Gy and w_R = 3, what is the dose equivalent H_T?
• Which statement best defines exposure in radiological terms?
• How many people were contaminated in the Brazil 1987 radiological incident?
• Where is brachytherapy commonly found?
• Which statement correctly defines absorbed dose D in gray (Gy)?
• How do you differentiate between primary beam radiation and scattered radiation?
• Which ARS subsystem has a threshold of about 2 Gy (200 rad)?
• Which factor most influences respirator selection for radiological work?
• What is the effective half-life and how do you compute it from physical and biological half-lives?
• What are the three main photon interaction mechanisms in the energy range used for medical imaging?
• Which statement describes the purpose of tissue weighting factors?
• Which device is capable of measuring gamma dose rate?
• If a person receives an absorbed dose of 2 Gy from a radiation type with Q = 1, what is the dose equivalent H?
• Which instrument is primarily used to measure exposure rate in air and is a gas-filled detector?
• Which statement about the effective half-life is true?
• If the transmitted beam is one-half of the initial intensity after shielding, how many HVLs of thickness were used?
• What did Egypt do in 1963?
• The determination of the kind, quantity or concentration and location of radioactive material in the human body is called?
• Which ARS subsystem has a threshold of 20 Gy?
• Historically, exposure was measured in which unit?
• Which statement best describes the difference between regulatory limits and ALARA in radiation safety?
• Describe the inverse square law for external exposure and when it applies.
• Which expression correctly represents the equivalent dose to a tissue?
• What is the definition of a radioactive commodity accident?
• Which statement correctly describes how TLD and OSL dosimeters read dose?
• Bremsstrahlung refers to radiation produced in which context?
• In the contamination control area workflow, what step follows decontamination?
• Which statement correctly describes effective dose?
• The deposit, absorption, or adsorption of radioactive material on or by structures, areas, personnel, or objects is called?
• The deposit, absorption, or adsorption of radioactive material on or by structures, areas, personnel, or objects is called?
• How do you convert absorbed dose to dose equivalent for different radiation types?
• What is the main purpose of a Radiation Safety Officer (RSO)?
• What is the purpose of calibration of dosimeters?
• What can be detected from a single void urine bioassay?
• Which statement describes a deterministic effect?
• In 1963, Egypt threatened to place which material on a missile warhead aimed at Israel?
• Which scenario best illustrates a stochastic effect?
• Which method is used to measure radionuclide distribution inside a living body, such as whole-body or organ counting?
• Which safety precaution is commonly recommended during radiation surveys?
• What is the purpose of decontamination in radiological safety?
• What is deep-dose equivalent, H_d?
• Which CBRN marking set indicates Rad/Nuke hazard?
• Which of the following is a step in responding to a radiological accident (SWIMS)?
• What is the half-value layer (HVL) and how is it used in shielding design?
• One curie equals how many decays per second?
• PDR-77 is capable of detecting which types of radiation?
• In a nasal swab bioassay, which category can be detected?
• X-rays are produced when which of the following occurs?
• Which class of materials is typically used for attenuation of gamma radiation and what factors influence the shielding design?
• Differentiate between stochastic and deterministic radiation effects with examples.
• In applying ALARA, which factor is commonly considered alongside dose reduction?
• Convert the following: 1 Gy equals how many rad, and 1 Sv equals how many rem?
• HVL is defined as:
• What is specific activity and how is it used in dose and source characterization?
• Which option is a QA/QC activity in radiation survey work?
• What measures are used to prevent the spread of contamination via ventilation and waste handling?
• Differentiate between a Geiger-Müller counter and an ionization chamber used in radiation dosimetry.
• What is air kerma?
• Cancer is an example of which type of radiation effect?
• Two gray is equivalent to how many rad?
• What does the effective dose allow us to estimate?
• What is the purpose of tissue weighting factors in radiation dose calculations?
• Which quantity is used primarily for area monitoring to assess external exposure?
• Which protective action(s) are guided by PAGs during a radiological emergency?
• What is the annual occupational dose limit for skin or extremity?
• Which detector uses current proportional to dose rate?
• What are Protective Action Guides (PAGs) and how are they used in radiological emergencies?
• Which statement correctly describes the use of ALI and DAC together in dose planning?
• What is the gamma dose rate constant and its use in shielding calculations?
• What is the purpose of a gamma-ray spectrometer and what information does it provide?
• Which CBRN marking set indicates Mines hazard?
• Which statement best describes the occupational dose limit for minors relative to adult limits?
• Which term describes the process used to determine the presence, amount and location of radioactive material in the body?
• One becquerel is defined as:
• In gamma-ray instrumentation, what is the primary use of an ionization chamber?
• UDR-13 capabilities include which description?
• Which quantity is used in SI to express exposure today?
• When should a follow-up sample be taken for a bioassay to confirm results?
• Which statement correctly distinguishes external exposure from internal exposure?
• What does environmental monitoring in a radiological program involve?
• Bioassay is performed to measure which of the following?
• What is a committed dose and how is it estimated for an intake of radionuclides?
• Why might tungsten be chosen over lead for gamma shielding in certain applications?
• How is shielding thickness t calculated from HVL data for a gamma source?
• Which statement describes a stochastic effect?
• What is the purpose of the barrier concept?
• Which of the following is a method used in contamination control (RPD)?
• What describes a scintillation detector used in gamma spectroscopy?
• What does the concept of collective dose represent?
• Which CBRN marking set indicates Biological hazard?
• Which activity best describes the Echelon 1 mission in radiation surveys?
• Which option correctly differentiates in vivo and in vitro bioassay methods?
• What is ambient dose equivalent, H*(10), primarily used for?
• When unmasking with a M256A1 Kit, how long should you observe the soldier?
• How does neutron shielding differ from gamma shielding and what materials are typically used?
• What is the typical sequence of steps in the initial response to a radiological incident?
• Which expression correctly represents the effective dose?
• For shielding gamma emitters, which material property is most relevant to attenuation?
• Which materials are used for neutron shielding?
• The annual limit for the eye lens is commonly about how many mSv per year?
• Which detector is commonly used for survey measurements and contamination monitoring via pulse counting?
• What is the first step taken when a radiation worker reports their dosimeter lost or damaged?
• Which statement correctly defines Derived Air Concentration (DAC) and Annual Limit on Intake (ALI)?
• Which ARS subsystem has a threshold of about 10 Gy (1000 rad)?
• Which detector is most suitable for quick yes/no indication of radiation presence in the field?
• What steps are involved in calibrating a dosimeter and ensuring traceability?
• Which unit is the unit of activity?
• Continuous monitoring would be conducted when?
• What is the recommended annual occupational effective dose limit for adults in the United States?
• Which of the following is an aspect of contamination control (RPD)?
• Dose equivalent H_T is equal to absorbed dose multiplied by which factor?
• Which term describes biological effects that occur by chance, are not clearly tied to radiation exposure, and include primarily cancer and genetic effects?
• Which marking set indicates Mines hazard?
• Which statement best describes a beta particle?
• What does ALARA stand for?
• The PDR-77 is capable of detecting radiation types?
• What is the occupational dose limit during the entire pregnancy?
• Which specimen type is used for a single void bioassay?
• Which statement defines an exposure rate?
• Which statement best describes the source term in shielding design?
• The equivalent dose H_T accounts for radiation type through which factor?
• What is the relationship between the Curie and the Becquerel?
• Which statement best describes the three fundamental protection strategies of time, distance, and shielding with a practical example?
• What is a gray (Gy) defined as?
• What is the correct description of attenuation coefficients and mass attenuation coefficients and their relevance in shielding calculations?
• Which of the following particles is typically emitted from the nucleus and has a negative charge?
• Which statement correctly differentiates a passive dosimeter from an active dosimeter?
• Which form is used for the record of occupational radiation exposure?
• Which form is described as the Charge Out Record for dosimetry?
• Which statement best distinguishes external exposure from internal exposure in health physics?
• Why is angular response of detectors important in dosimetry and shielding calculations?
• What is a gamma-ray spectrometer used for?
• Which organization is the primary regulatory oversight body in the United States for radiation safety in medicine?
• Define bremsstrahlung and explain its significance in shielding high-energy radiation.
• The Central Nervous System threshold is equal to how many Gy?
• Which statement correctly describes dose rate and cumulative dose?
• Radiation that has the ability to remove an electron from an atom is called what?
• Which of the following is NOT a type of contamination (RAF)?
• Which of the following are the three fundamental protective strategies of ALARA?
• What does Assigned Protection Factor (APF) signify in respirator use?
• The annual limit for skin and extremities is typically how many mSv per year?
• A fecal specimen bioassay is designed to detect which category?
• Which non-SI unit is commonly used for dose equivalent?
• What form is used when the dosimetry record is kept separate from the health record (Charge Out Record)?
• The UDR-13 is capable of detecting which measurements?
• Which marking set corresponds to Rad/Nuke hazard?
• Three types of contamination (RAF) are Removable, Airborne, and Fixed. Which option is NOT a type?
• What is the annual occupational dose limit for whole body exposure?
• How many rem are contained in 1 sievert (Sv)?
• Which statement correctly relates curie and becquerel?
• Surveyors controlling their own exposure and ensuring instruments are working and reading and recording results properly are the mission of which level?
• Under what condition does the inverse square law apply for external exposure?
• Which of the following best describes the purpose of containment measures in a radiological facility?
• Which additive is commonly used with hydrogen-rich shielding to capture neutrons?
• Which statement about gamma dose rate constant is true?
• Which of the following is NOT typically a key element of a radiation safety program?
• Which factors influence the occurrence and severity of deterministic effects such as erythema or cataracts?
• What is the general approach to estimating dose from inhalation or ingestion intake?
• Which CBRN marking set corresponds to Biological hazard?
• Which event involved scavengers dismantling a teletherapy machine?
• Who discovered X-rays?
• Which color combination is used to indicate Chemical hazard?
• Which substance is NOT listed as a potential cause of false positives for chemical detectors?
• How is the transmission factor through shielding quantified?
• What is the purpose of a shielding barrier?
• Annual Limit on Intake (ALI) is defined as which of the following?
• In shielding design for mixed neutron-gamma fields, which statement is most accurate?
• Which capability is listed for VDR-2?
• Which CBRN marking set indicates Chemical hazard?
• Which statement best reflects international conclusions about radiological weapons?
• What is the typical workflow for a contamination control area?
• If dose rate at 1 m is 800 mSv/h, what is the dose rate at 2 m according to the inverse square law?
• Which quantity is specifically used to summarize radiation burden across a population for risk assessment?
• Which statement best describes the PDR-77's capabilities?
• Which statement about specific activity is true?
• What is the primary purpose of a gamma dose rate constant in shielding calculations?
• One rem equals how many sieverts?
• What is the annual occupational dose limit for the lens of the eye?
• Among the listed dose limits, which has the smallest numeric value?
• What is the annual dose limit to the public from licensed operations?
• In radiological terminology, what does the term source term mean?
• Which international and national organizations provide dose limits and risk guidelines for health physics?
• Depleted uranium is used in which of the following?
• Derived Air Concentration (DAC) represents what?
• Which material is commonly used in scintillation detectors for gamma radiation measurement?
• Which body region has the highest annual occupational dose limit among the listed categories?
• Which term describes biological effects with a threshold dose and a clear dose–response relationship?
• What is the purpose of a decontamination procedure?
• Which groups must wear a Dosimeter (TLD) according to the material?
• Which role is typically responsible for implementing the ALARA policy and monitoring compliance?
• Which form is used for recording occupational exposure in the dataset?
• Which statement about the sievert (Sv) is true?
• Who discovered radioactivity?
• What is the definition of half-life in radioactive decay?
• Which device is described as handheld?
• Distinguish between passive and active dosimetry and give examples.
• For confirming bioassay results, when should the follow-up sample be taken?
• What is Bioassay used to determine in the human body?
• A neutron particle is characterized by which of the following?
• Why are neutrons difficult to detect?
• What is the expected impact of a radiological terrorist attack?
• When unmasking without a M256A1 Kit, what action should you take?
• What is an ionization chamber used for in radiation protection?
• Which of the following is an example of a stochastic radiation effect?
• What is a thermoluminescent dosimeter (TLD)?
• What is an optically stimulated luminescent (OSL) dosimeter?
• ALARA stands for which phrase?
• Which statement correctly identifies the effective dose?
• Which of the following is a deterministic radiation effect?
• What have all nations concluded about radiological weapons?
• What distinguishes external exposure from internal contamination?
• How is the committed dose to an organ calculated from a radionuclide intake?
• Which term describes the radiation that is capable of ionizing atoms and is a primary concern in health physics?
• Which of the following is NOT a common type of personal dosimeter used in occupational settings?
• Neutron radiation detection is challenging because:
• What is the linear no-threshold (LNT) model?
• The neutron particle is described as which of the following?
• Which unit is used to express the commonly cited occupational dose limits?
• Which set lists the primary SI units for activity, absorbed dose, dose rate, and dose equivalent correctly?
• What is the difference between a smear (wipe) test and a survey meter reading?
• What is the purpose of a source term in shielding design?
• Periodic monitoring for radiation is typically conducted under which circumstance?
• Which term refers specifically to radiation that can remove electrons from atoms?
• Spontaneous nuclear transformations causing formation of new elements are known as what?
• Geiger-Müller counters are best used for which purpose?
• Which statement best describes regulatory limits in radiation safety?
• For a point source, how does dose rate change with distance?
• Which factor does NOT govern shielding design for gamma emitters?
• Which term best describes the relationship between dose and probability of cancer or genetic effects?
• Which statement correctly describes an alpha particle?
• Annual occupational dose limit for whole-body exposure is typically about?
• Define effective dose and explain its purpose in risk assessment.
• Energy emitted in the form of waves or particles is defined as which term?
• Who would you call to dispose of radioactive commodities?