Millwright Level 1 Practice Exam

Which set of taps is commonly found in a complete hand tap set?

1. Taper, plug, and bottoming

2. Coarse, fine, and extra-fine

3. Metric, imperial, and standard

4. Large, medium, and small

The correct answer is: Taper, plug, and bottoming

A complete hand tap set typically includes taper, plug, and bottoming taps. Each type of tap is designed with a specific purpose and function, allowing for versatility in creating threads in various applications. Taper taps are designed to start the threading process smoothly and are used to create the initial threads in a pre-drilled hole. They have a tapered lead that allows for easier entry into the hole, reducing the risk of breaking the tap during use. Plug taps are used primarily for threading holes where deeper threads are required. They have a shorter taper compared to taper taps, enabling them to cut threads further down into the material. Bottoming taps are used when you need to tap all the way to the bottom of a blind hole, where no taper is available to start the threading. They provide a way to create full-depth threads in such holes, ensuring maximum engagement of the screw or bolt. This combination covers the wide range of threading needs that may arise in milling and machining processes, making it an essential part of a machinist's toolkit. The other options do not represent a standard configuration found in hand tap sets, focusing instead on thread types or sizes, which are not organized into these functional categories.