Question

When using radiography to inspect steel plate, hole type IQIs are generally required to be placed:

A. On the source side, next to the weld bead.
B. On the detector side, opposite the weld bead.
C. Equidistantly from both the source and the weld bead.
D. On the edge of the steel plate, away from the weld bead.

Answer 1

For radiographic inspection of steel plates, hole type IQIs should be placed on the detector side, opposite the weld bead, to ensure proper radiographic quality and sensitivity of the inspection.

Step-by-step explanation:

When using radiography to inspect a steel plate, hole type Image Quality Indicators (IQIs) are generally required to be placed on the detector side, opposite the weld bead. This positioning ensures that the IQI is on the side of the film or detector, which allows for the evaluation of the radiographic quality and the sensitivity of the inspection. Placing the IQIs on the detector side also helps in assessing the definition and contrast of the image while being less affected by the finer details of the material's internal structure, like the weld bead. This practice applies to radiographic testing in both industrial settings and in medical diagnostics, where proper placement of IQIs or shielding can greatly influence the quality and safety of the x-ray imaging process.