ASNT Industrial Radiography Radiation Safety Practice Test

What is the terminal reading for containers labeled as Yellow III?

1. 200 mR/h

2. 500 mR/h

3. 1 mR/h

4. 10 mR/h

The correct answer is: 200 mR/h

The correct answer for the terminal reading for containers labeled as Yellow III is 200 mR/h. This classification pertains to the Transportation of Radioactive Material, which is regulated by the International Atomic Energy Agency (IAEA) and the U.S. Department of Transportation (DOT). Containers designated as Yellow III are identified as having a specific range of radiation exposure rates. The terminal reading of 200 mR/h refers to the dose rate that may be measured at a distance of one meter from the surface of the package when it is properly labeled and transported. This level indicates that while the package does emit radiation, it is still within the limits set for safe transportation. In contrast, other readings mentioned in the options reflect different categories or specifications. For instance, a terminal reading of 500 mR/h would signify a higher level of hazard and is associated with a different classification, while 1 mR/h and 10 mR/h indicate lower levels of radiation exposure, aligning more closely with packages that present less risk. Thus, 200 mR/h is the specific limit established for Yellow III containers, ensuring clarity and safety in the transport of radioactive materials.