A tap is used for _______ a holeQuestion 17Select one:a.trepanningb.finishingc.centeringd.enlarginge.threading

Breakdown the Problem

To determine the appropriate term that describes the function of a tap related to a hole, we need to analyze the choices provided.

Relevant Concepts

The context involves machining and hole preparation processes. Here are some definitions:

1. Trepanning: A machining process to create a large hole or a cavity.
2. Finishing: The final machining process to improve appearance and tolerance.
3. Centering: The process of accurately positioning a point (often the center of a hole).
4. Enlarging: Increasing the size of an existing hole.
5. Threading: The process of creating a screw thread inside a hole.

Analysis and Detail

• Trepanning generally does not relate to taps, as it is employed for large diameter hole making.
• Finishing might involve taps but is too broad, as it is about surface quality.
• Centering isn't applicable since taps don’t center holes.
• Enlarging does not specifically refer to taps, which are more about adding threads.
• Threading is the process of using a tap to cut internal threads in a pre-drilled hole.

Verify and Summarize

Since taps are primarily used to create threads within a hole, the most suitable answer is threading.

Final Answer

A tap is used for threading a hole.