Apart from the project scope, drawings, and PO he could have expanded further as, For diameter, I'd refer to QW-452.3 and select a test pipe that covers the minimum pipe size. For thickness, I'd use QW-451for a maximum expected thickness in the project. For material, I'd check the QW-420 for P no to ensure coverage for the actual project materials and sometimes Group No., if impact testing is required. This shows code knowledge and logical project application beyond just PO checking. C Sridhar. On Mon, 15 Sept 2025 at 18:10, bUDdhAgUru < gurupadgs@gmail.com > wrote: Dear Team, Kindly provide your valuable views for the below query. Regarding the interview question: "How does a QC engineer select pipe diameter, thickness, and material for conducting a Welder Qualification Test (WQT) in a new project, assuming no QC Manager is available and without verbal consultation with the client?" QC answered as "he will clarify Min. dia. Max. thk. an...