HAZMAT CDL Test 2025 – 400 Free Practice Questions to Pass the Exam

Infectious substances are defined as materials that can cause disease in humans or animals. The anthrax virus is a well-known example of an infectious substance, as it is a pathogen that can lead to serious diseases in both animals and humans. When transported, infectious substances require strict adherence to safety regulations because they pose significant health risks if they are released or improperly handled.

The other materials listed do not fall under the category of infectious substances. Potassium cyanide is a highly toxic chemical but does not cause infections. Uranium is a radioactive material, primarily associated with radiation hazards rather than infectious diseases. Ammonium nitrate is a chemical commonly used in fertilizers and explosives, posing risks related to chemical reactivity but not in terms of infection. Therefore, the anthrax virus is correctly identified as an infectious substance due to its ability to infect and cause disease.