ASNT Industrial Radiography Radiation Safety Practice Test

What level of overall accuracy is required for radiation survey equipment?

1. ±10%

2. ±15%

3. ±20%

4. ±25%

The correct answer is: ±20%

The required overall accuracy for radiation survey equipment is typically set at ±20%. This standard ensures that the measurements taken by such equipment are sufficiently precise for effective monitoring of radiation levels. An accuracy of ±20% means that any reading reported by the survey equipment can vary by 20% above or below the actual exposure level. This level of accuracy is critical in industrial radiography, where understanding radiation exposure is vital for safety assessments and regulatory compliance. Ensuring that survey instruments maintain this degree of accuracy helps operators make informed decisions based on reliable data, protecting both personnel and the environment from potential hazards associated with radiation exposure. Maintaining a lower accuracy threshold, such as ±10% or ±15%, although beneficial, may not be practical for all types of survey instruments used in the field, where conditions and variables can introduce variance. Therefore, the acceptance of ±20% reflects a balance between operational feasibility and the need for reliable safety monitoring.