WMSL Basic DC Practice Test

The correct answer focuses on the established principles for minimizing radiation exposure, which are time, distance, and shielding.

Time refers to the duration of exposure; minimizing the amount of time spent in a radiation environment directly reduces the total dose received. The less time spent near a radiation source, the lower the overall exposure.

Distance is a critical factor because intensity decreases with increased distance from a radiation source. By increasing the distance between the individual and the source of radiation, the exposure level decreases significantly due to the inverse square law, which states that the intensity of radiation is inversely proportional to the square of the distance from the source.

Shielding involves using materials to absorb or block radiation. Different types of radiation require different shielding materials; for instance, heavy lead is often used for X-ray and gamma radiation, while paper or plastic may be sufficient for alpha particles. Effective shielding can dramatically reduce the amount of radiation that reaches an individual.

The other options presented include terms that may relate to safety or risk management in broader contexts but do not specifically address the primary principles for minimizing radiation exposure. Therefore, the focus on time, distance, and shielding aligns directly with the key strategies employed in radiation safety practices.