Millwright Level 1 Practice Exam

Which operation is typically performed to achieve the final dimensions of a hole?

1. Drilling

2. Boring

3. Milling

4. Turning

The correct answer is: Boring

Boring is the operation typically performed to achieve the final dimensions of a hole. This process involves enlarging an existing hole to precise diameters and finishes, making it suitable for applications where accuracy is paramount. Unlike drilling, which primarily creates the initial hole, boring allows for adjustments and refinements to ensure that the hole meets specific tolerances and is smooth enough for various components to fit snugly. In contrast, drilling is used for creating holes but does not necessarily guarantee the precision required for final dimensions. Milling is a machining operation that primarily produces flat surfaces, though it can create holes in some contexts; however, it is not specifically designed for achieving precise hole dimensions. Turning involves rotating a workpiece against a cutting tool to reduce its diameter, which is not applicable to creating or finishing holes. Each of these operations has its unique applications, but boring is best suited for finalizing the dimensions of holes accurately.