In W47.1, what does the 'WT' welding personnel classification signify?

In W47.1, what does the 'WT' welding personnel classification signify?

• A. Wave testing
• B. Depositing arc spot welds
• C. Depositing tack welds
• D. Welding from one side without backing

Answer: (C)

In W47.1, the WT welding personnel classification indicates a person is qualified to deposit tack welds only. Tack welds are small, temporary welds used to hold components in proper alignment for fit-up before the final, full-strength weld is made. This classification defines the scope of work the welder is authorized to perform—limited to placing tack welds and not to performing full welds along a joint. If a job requires continuous welds, deeper or longer weld passes, or final structural welds, a different classification or additional qualification would be needed. The other options describe testing methods or different welding techniques, not the scope of personnel classification that WT represents.

In W47.1, the WT welding personnel classification indicates a person is qualified to deposit tack welds only. Tack welds are small, temporary welds used to hold components in proper alignment for fit-up before the final, full-strength weld is made. This classification defines the scope of work the welder is authorized to perform—limited to placing tack welds and not to performing full welds along a joint. If a job requires continuous welds, deeper or longer weld passes, or final structural welds, a different classification or additional qualification would be needed. The other options describe testing methods or different welding techniques, not the scope of personnel classification that WT represents.