ASNT Industrial Radiography Radiation Safety Practice Test

What is the measurement range that a survey meter must be capable of reading?

1. 0 to 100 mR/h

2. 0 to 500 mR/h

3. 2 to 1000 mR/h

4. 0 to 2000 mR/h

The correct answer is: 2 to 1000 mR/h

The requirement for a survey meter to be capable of reading within the range of 2 to 1000 mR/h is based on the typical radiation levels encountered in industrial radiography settings. This range is broad enough to ensure that the survey meter can effectively measure both low and moderate levels of radiation exposure that personnel may experience during radiographic operations. The lower limit of 2 mR/h allows for the detection of low radiation levels, which is essential for safety and environmental monitoring. This is particularly important in industrial settings where radiation exposure can vary significantly due to the presence of radioactive sources. The upper limit of 1000 mR/h accommodates the higher radiation levels that might be encountered during certain tasks, ensuring that readings remain accurate without saturating the device. In contrast, narrower ranges, such as 0 to 100 mR/h or 0 to 500 mR/h, might not encompass the higher exposure scenarios that could be present in industrial applications. Similarly, a range extending to 0 to 2000 mR/h could exceed typical operational needs, potentially complicating the interpretation of lower exposure readings. Therefore, the designated range of 2 to 1000 mR/h reflects the practical requirements for effective monitoring and safety in radiographic