A visual certification is certified in accordance with which standard?

A visual certification is primarily guided by standards that ensure the proper qualifications and procedures for personnel involved in visual inspection. The ASNT-SNT-TC-1A standard specifically addresses the qualifications for nondestructive testing (NDT) personnel, which includes visual inspection techniques. This standard outlines the necessary requirements for training, education, and experience in visual testing, thereby establishing a framework for competence in the field.

While other standards like API 1104, AWS D1.1, and ASME Section IX focus on specific welding practices, codes, and related qualifications, they do not specifically outline the visual inspection certification process in the same manner that ASNT-SNT-TC-1A does. Therefore, understanding the context and purpose of ASNT-SNT-TC-1A makes it clear why it is the correct answer for a visual certification standard.