What type of weld would be used if the ends of the pieces that are to be welded are prepared to be square, beveled, U-shaped, or J-shaped?

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Groove welds are used when the ends of the pieces to be welded are prepared with square, beveled, U-shaped, or J-shaped grooves to allow for penetration and complete fusion between the pieces. Fillet welds are used when two pieces are joined in a lap, T, or corner joint and do not require any preparation of the ends. Surfacing welds are used to build up or repair a surface, and plug welds are used to join two pieces together by welding one piece through a hole in the other.

What Type of Weld Would Be Used If the Ends