Question 638General Subjects - Assistant Engineer

The correct answer is D) cutting-off tool. A cutting-off tool, also known as a parting tool, is used to separate or cut off a workpiece from the main stock. This is the primary function of the tool shown as figure "U" in the illustration GS-0090. The other answer choices do not accurately describe the purpose and use of this specific lathe tool. The right side end facing tool (B) is used for facing operations, while the left cut side-facing tool (C) is used for side-facing operations. The universal turning tool (A) is a general-purpose tool used for various turning operations, but it is not specifically designed for cutting off the workpiece.