ASNT Industrial Radiography Radiation Safety Practice Test

What sound level should a rate alarm meter reach at 500 mR/h?

1. 70 dL

2. 80 dL

3. 90 dL

4. 100 dL

The correct answer is: 80 dL

The correct sound level for a rate alarm meter at 500 mR/h is set at 80 dB. This standard is established to ensure that the alarm is sufficiently audible in various operational environments where industrial radiography might take place. The choice of 80 dB reflects a balance between being loud enough to be heard over ambient noise while not being excessively loud, which could cause discomfort or hearing damage. Regulatory and safety guidelines specify sound levels for radiation alarming devices to ensure that personnel in the area are alerted to potentially hazardous exposure levels. At 500 mR/h, the alarm must be prominent to provide a timely warning that prompts individuals to take necessary safety precautions or evacuate the area if needed. Understanding the rationale behind the sound level is important for radiation safety management, as it directly impacts how effectively workers can respond to radiological hazards.