NCCER Millwright Practice Exam

What feature does a die provide when cutting threads?

1. Internal threads

2. External threads

3. Knurling

4. Chamfering

The correct answer is: External threads

When cutting threads, a die specifically provides external threads. A die is a tool used in machining and metalworking to create the male part of a threaded fastener, such as a bolt or screw, by cutting external threads onto a cylindrical piece of material. This process involves using the die to remove material, creating a helical ridge pattern on the surface of the workpiece, which facilitates the fastening and joining of components. In terms of threading, the distinction is important: internal threads are created using different tools, such as taps, which are designed to cut threads inside a hole. Other options mentioned, like knurling and chamfering, serve entirely different purposes; knurling creates a textured pattern for grip, while chamfering is the process of beveling the edge of a workpiece for safety or aesthetics. Thus, the die is solely responsible for forming the external threads necessary for various applications in construction and manufacturing.