IFSAC Hazardous Materials (HAZMAT) Practice Exam

Beta radiation consists of high-energy, high-speed electrons or positrons emitted by certain types of radioactive decay. The statement that it can be shielded by materials like plastic or clothing accurately reflects the nature of beta particles. While beta radiation can penetrate materials better than alpha particles, it is still relatively low in energy compared to gamma radiation. Because of this, beta radiation can be effectively stopped or significantly attenuated by materials such as plastic, wood, or even clothing, which makes it less hazardous in terms of external exposure compared to alpha particles that cannot penetrate the skin at all.

This property of beta radiation allows for protective measures to be put in place, making it possible to work safely in environments where beta emitters are present, as long as appropriate shielding is utilized. In contrast, options suggesting that beta radiation can penetrate deep into materials or that it is commonly used for medical treatment do not accurately convey the shielding properties and common applications of beta radiation. Furthermore, while it's true that beta radiation can penetrate the skin's surface, it is not correct to state that skin alone is sufficient to stop it. Understanding these characteristics is crucial in contexts involving radiation safety and health physics.