Which QA form is concerned with the inspection of weld defects?

The correct choice focuses on the specific QA form that is designed to inspect weld defects, which relates directly to ensuring the integrity and quality of welds in construction and manufacturing processes. QA Form 20C is structured to evaluate the weld quality, identifying potential defects such as cracks, porosity, and incomplete fusion. This form is crucial for maintaining standards in welding practices, as it outlines inspection criteria, documentation requirements, and helps ensure compliance with relevant codes and standards.

Other forms may cover different aspects of quality assurance but do not specifically target weld defects. For instance, some forms may focus on general quality control or different materials, thereby not aligning with the specific needs of weld inspections. The specificity of QA Form 20C in addressing weld defects is what makes it the appropriate choice for evaluating weld quality and ensuring robust safety and performance standards in welding applications.