Final answer:
Qualification of a welding procedure includes testing of welders, inspection of materials, and approval of the welding procedure specification (WPS), which implies that all these steps are part of the process.
Step-by-step explanation:
The qualification of a welding procedure involves several essential steps to ensure that the process can produce a weld capable of meeting applicable requirements. This usually includes:
- Testing of welders: Assessing the skills and capabilities of welders to ensure they can perform the tasks according to the procedure.
- Inspection of materials: Ensuring that the materials to be welded are of suitable quality and are in accordance with the specifications.
- Approval of the welding procedure specification (WPS): Developing and verifying that the WPS is appropriate for the project and meets all required standards and codes.
Therefore, the correct answer to the student's question is D) All of the above.