ASNT Industrial Radiography Radiation Safety Practice Test

What was the maximum thickness of steel that could be inspected using X-radiation from 1920-1930?

1. 1" (2.54 cm)

2. 2" (5.08 cm)

3. 3" (7.62 cm)

4. 4" (10.16 cm)

The correct answer is: 3" (7.62 cm)

The correct answer reflects the advancements in radiographic technology during that period, specifically relating to the capabilities of X-ray equipment used for inspecting steel. Between 1920 and 1930, industrial radiography was evolving, and the maximum thickness of steel that could be effectively inspected using X-radiation was indeed around 3 inches (7.62 cm). During this time, the X-ray equipment and techniques were not as advanced as they are today, which limited the penetration capabilities of the radiation. However, as the technology progressed, the ability to assess thicker materials improved, leading to a maximum thickness of 3 inches for reliable inspection. This understanding of limitations in material thickness is essential for ensuring quality control in industrial settings and highlights the importance of using properly calibrated and maintained radiographic equipment to achieve the best results.