ASNT Industrial Radiography Radiation Safety Practice Test

What is the maximum radiation dose indicating a caution radiation area?

1. 1 mSv/h

2. 50 mSv/h

3. 100 mSv/h

4. 500 R/h

The correct answer is: 50 mSv/h

The maximum radiation dose indicating a caution radiation area is defined as 0.02 mSv/h, which equates to approximately 2 mrem/h. However, a caution radiation area generally signifies a need for awareness and protective measures when the exposure rate exceeds this level. The threshold of 50 mSv/h reflects a level where significant care must be taken to ensure personnel do not receive alarming doses inadvertently. At this dose rate, individuals can easily exceed safe exposure limits if they are not careful. It signals the need for appropriate signage and potentially physical barriers, depending on the circumstances, to prevent unintended exposure. This standard is part of regulatory frameworks that aim to protect workers and the public from radiation hazards. Options that suggest higher dose rates, such as 100 mSv/h or 500 R/h, represent levels where immediate action would be required due to the highly dangerous nature of the radiation environment, going well beyond what would be considered a cautionary area. Such limits are set to ensure that individuals who might be exposed are aware of their surroundings and can take necessary precautions to minimize their exposure.