Radiation Health and Safety Test Radiation Health and Safety Test Radiation Protection & Shielding 1

Question 1

What are the three fundamental principles of radiation protection?

Accepted Answer

Time, distance, and shielding

Answer

The three cardinal principles of radiation protection are minimizing time of exposure, maximizing distance from the source, and using appropriate shielding.

Question 2

What does ALARA stand for in radiation protection?

Accepted Answer

As Low As Reasonably Achievable

Answer

ALARA is the guiding principle of radiation protection, requiring that radiation exposure be kept as low as reasonably achievable, considering economic and social factors.

Question 3

What is the NRC annual occupational whole-body effective dose limit for radiation workers in the United States?

Accepted Answer

50 mSv (5 rem)

Answer

The NRC sets the annual occupational dose limit at 50 mSv (5 rem) whole-body effective dose for radiation workers, as specified in 10 CFR Part 20.

Question 4

Which material is most commonly used as shielding against gamma radiation in diagnostic radiology facilities?

Accepted Answer

Concrete and lead

Answer

Lead (for portable/secondary barriers) and concrete (for primary barriers in walls/floors) are the most commonly used shielding materials for gamma and X-ray radiation in medical facilities.

Question 5

What is the purpose of a personal dosimeter worn by radiation workers?

Accepted Answer

To monitor and record an individual's cumulative radiation exposure

Answer

A personal dosimeter (e.g., film badge, TLD, OSL badge) measures and records the cumulative radiation dose received by the wearer for regulatory and safety monitoring.

Radiation Health and Safety Test Practice Test

Radiation Health and Safety Test Practice Test

Radiation Health and Safety Test Radiation Health and Safety Test Radiation Protection & Shielding 1