Question 1

The United Nations Scientific Committee on the Effects of Atomic Radiation (UNSCEAR)evaluates human and environmental ionizing radiation exposures from a variety of sources,including
1)radioactive materials
2)radiation-producing machines
3)radiation accidents

Accepted Answer

The UNSCEAR evaluates human and environmental ionizing radiation exposures from a variety of sources including radioactive materials, radiation producing machines, and radiation accidents. Therefore, the correct choice is 1, 2, and 3.

Question 2

Which of the following agencies was previously known as the Atomic Energy Commission?

Accepted Answer

The Nuclear Regulatory Commission (NRC) was previously known as the Atomic Energy Commission, which was responsible for regulating nuclear energy and ensuring its safety in the United States. The FDA (Food and Drug Administration) regulates the safety of food, drugs, and medical devices. The ICRP (International Commission on Radiological Protection) and NCRP (National Council on Radiation Protection and Measurements) are international and national organizations, respectively, that provide guidance on radiation protection and safety.

Question 3

The main function of the Nuclear Regulatory Commission (NRC)is to
1)inspect imaging facilities.
2)oversee the nuclear energy industry.
3)regulate imaging facilities.

Accepted Answer

The Nuclear Regulatory Commission (NRC) is responsible for overseeing the nuclear energy industry, ensuring safety and security at nuclear power plants and facilities, and regulating the use of nuclear materials. They do not have any responsibility for inspecting or regulating imaging facilities.

Question 4

Revised concepts of radiation exposure and risk have brought about more recent changes in NCRP recommendations for limits on exposure to ionizing radiation.Because many conflicting views exist on assessing the risk of cancer induction from low-level radiation exposure,the trend has been to

Accepted Answer

The statement suggests that there are conflicting views on assessing the risk of cancer induction from low-level radiation exposure. Therefore, the trend has been to create more rigorous radiation protection standards to ensure safety.

Question 5

Which of the following are responsibilities of a health care facility's radiation safety committee (RSC)?
1)Delegate operational funds in the budget for the radiation safety program
2)Provide guidance for the radiation safety program
3)Facilitate the ongoing operation of the radiation safety program

Accepted Answer

The Radiation Safety Committee (RSC) is primarily responsible for providing guidance for the radiation safety program and facilitating its ongoing operation. Delegating operational funds in the budget is typically a responsibility of the facility's administration or finance department, not the RSC.

Question 6

Which of the following statements is true?

Accepted Answer

While medical imaging personnel work with radiation, they are trained to use protective measures to limit their exposure. They often receive equivalent doses that are much lower than the annual occupational effective dose limit, making option C the most accurate statement. However, it is still important for them to follow proper safety protocols to minimize their exposure to radiation.

Question 7

Which of the following groups is run by the government of Japan,primarily to study Japanese atomic bomb survivors?

Accepted Answer

The Radiation Effects Research Foundation (RERF) is a joint Japan-U.S. research organization founded in 1947 to study the effects of atomic bomb radiation on the survivors of the bombings of Hiroshima and Nagasaki. It is primarily funded and run by the government of Japan.

Question 8

Occasional exposure for the purpose of education and training is permitted,provided that special care is taken to ensure that the annual effective dose limit of ____________ is not exceeded for persons under the age of 18 years.

Accepted Answer

The correct answer is 1 mSv annually. This is the annual effective dose limit set for persons under the age of 18 years for occasional exposure for the purpose of education and training, ensuring that their exposure is kept to a minimum while allowing for educational opportunities.

Question 9

Which of the following are functions and/or responsibilities of the United States Occupational Safety and Health Administration (OSHA)?
1)Functions as a monitoring agency in places of employment,predominantly in industry
2)Regulates occupational exposure to radiation through Part 1910 of Title 29 of the U.S.Code of Federal Regulations (29 CFR 1910)
3)Responsible for regulations concerning an employee's "right to know" with regard to hazards in the workplace

Accepted Answer

OSHA is responsible for monitoring safety in workplaces, regulating exposure to hazards such as radiation (as specified in 29 CFR 1910), and ensuring employees are informed about workplace hazards, fulfilling all the roles listed.

Question 10

If a certain dose of radiation produces a skin burn,a higher dose of radiation will cause the skin burn to be more severe; however,a dose below the threshold level for skin burn will

Accepted Answer

A dose below the threshold level for skin burn will not cause a skin burn, hence it will not demonstrate the effect of causing a skin burn at all. Threshold levels indicate the minimum amount of exposure to a stimulus necessary to produce a noticeable effect.

Question 11

Determine the cumulative effective dose (CumEfD)limit to the whole body of an occupationally exposed person who is 46 years old.

Accepted Answer

According to the ICRP (International Commission on Radiological Protection), the CumEfD limit for an occupationally exposed person who is 46 years old is 460 mSv. This is the equivalent dose limit that takes into account the cumulative radiation exposure an individual may receive over the course of their career. The limit is based on the assumption that the individual is exposed to radiation on a regular basis throughout their working life.

Question 12

Upper boundary radiation exposure limits for occupationally exposed persons are associated with risks that are similar to those encountered by employees in other industries that are generally considered to be reasonably safe.These industries include
1)manufacturing.
2)trade.
3)government.

Accepted Answer

The upper boundary radiation exposure limits for occupationally exposed persons are designed to ensure that the risks they face are comparable to the risks encountered in other industries considered to be reasonably safe, such as manufacturing, trade, and government. This approach helps to standardize safety across different sectors.

Question 13

The essential concept underlying radiation protection is that

Accepted Answer

The essential concept underlying radiation protection is that any organ in the human body is vulnerable to damage from exposure to ionizing radiation. Therefore, it is important to limit exposure to radiation as much as possible to minimize the risk of harm to the individual.

Question 14

The cumulative effective dose (CumEfD)limit does not include
1)exposure acquired as a consequence of a radiation worker undergoing medical imaging procedures.
2)radiation exposure from natural background radiation.
3)radiation exposure received while radiographers perform imaging procedures on patients.

Accepted Answer

The answer of The cumulative effective dose (CumEfD)limit does not...

Question 15

The effective dose (EfD)limiting system supersedes

Accepted Answer

The effective dose (EfD) limiting system has replaced the maximum permissible dose (MPD) system which was previously used to set radiation exposure limits for workers and the general public. The EfD system considers the varying sensitivity of different tissues and organs to radiation exposure, whereas the MPD system had a uniform exposure limit for the whole body. Neither A, B, nor D accurately describes the relationship to the EfD limiting system.

Question 16

The responsibility for maintaining radiation monitoring records for all personnel and for providing counseling for individuals who receive monitor readings in excess of allowable limits belongs to the

Accepted Answer

The designated radiation safety officer is responsible for maintaining radiation monitoring records and providing counseling for individuals who receive monitor readings in excess of allowable limits. The director of human resources may have a role in personnel records but is not specifically trained in radiation safety. The hospital administrator has overall responsibility for the facility but may not have specific knowledge of radiation safety. The radiologic technologist in charge of quality control is responsible for monitoring and maintaining equipment, not personnel radiation monitoring records.

Question 17

The ALARA concept adopts an extremely conservative model with respect to the relationship between

Accepted Answer

The ALARA concept (As Low As Reasonably Achievable) is a principle of radiation safety that aims to minimize exposure to ionizing radiation. It adopts an extremely conservative model with respect to the relationship between ionizing radiation and potential risk, meaning that the goal is to keep radiation doses as low as possible, even if there is no definitive evidence of harm at those doses. This approach is based on the assumption that any amount of ionizing radiation has the potential to cause harm, and that the risk increases with higher doses. Therefore, the ALARA concept is focused on minimizing radiation exposure to protect individuals from any potential risk of harm.

Question 18

Which of the following terms involves a random effect of ionizing radiation?

Accepted Answer

Stochastic events involve random effects of ionizing radiation, meaning they occur in a probabilistic manner and their severity does not depend on the dose of radiation received. Examples include cancer and genetic mutations. Early tissue reactions, changes in white blood cell count, and reddening of the skin are deterministic effects that occur at higher doses of radiation and have a threshold for severity.

Question 19

The effective dose (EfD)limit for the lens of the eye is

Accepted Answer

The effective dose (EfD)limit for the lens of the eye is 15 mSv. This means that the lens of the eye should not receive a dose greater than 15 mSv in a year. This limit is set to prevent the development of cataracts, which can occur as a result of radiation exposure.

Question 20

Epidemiologic studies of atomic bomb survivors exposed in utero have provided conclusive evidence of a dose-dependent increase in the incidence of severe intellectual disability for fetal doses greater than approximately

Accepted Answer

The answer of Epidemiologic studies of atomic bomb survivors exposed...

Quiz 10: Dose Limits for Exposure to Ionizing Radiation

The United Nations Scientific Committee on the Effects of Atomic Radiation (UNSCEAR) evaluates human and environmental ionizing radiation exposures from a variety of sources,including 1) radioactive materials 2) radiation-producing machines 3) radiation accidents

Which of the following agencies was previously known as the Atomic Energy Commission?

The main function of the Nuclear Regulatory Commission (NRC) is to 1) inspect imaging facilities. 2) oversee the nuclear energy industry. 3) regulate imaging facilities.