Question 51 ONC01 - Master/Chief Mate Unlimited Tonnage

The Correct Answer is B **Why Option B ("A butt") is correct:** In technical illustration and engineering contexts, especially when referring to welds, joints, or material connections, a **butt joint** (or simply "a butt" when used to describe the joint type) is a connection where two pieces of material are brought together end-to-end, or edge-to-edge, in the same plane. Assuming D033DG shows a typical mechanical or structural connection (like a weld preparation or a simple junction), the letter D points to this flush, end-to-end configuration. **Why the other options are incorrect:** * **A) A seam:** While a seam is a general term for a line where two materials are joined, "butt" specifically identifies the geometric configuration of the joint (end-to-end alignment) which is more precise in technical drawing interpretation than the general term "seam." A seam can refer to many different types of joints (lap seams, fold seams, etc.). * **C) A span:** A span refers to the length or distance covered between two supports. It describes a measurement or extent, not the physical joint type itself. * **D) A sheet line:** A sheet line is not a standard term for a joint type. "Sheet" typically refers to flat material (like sheet metal), and "line" usually defines an edge or boundary. This phrase does not describe the configuration of the illustrated joint.