Intro to Millwright Practice Exam

Which type of retaining ring fits tightly into a groove and prevents components from moving?

1. Internal

2. External

3. Both Internal and External

4. None of the above

The correct answer is: Both Internal and External

The correct answer is that both internal and external retaining rings fit tightly into their respective grooves and effectively prevent components from moving. Internal retaining rings (often referred to as snap rings) are designed to fit inside the bore or housing of a component, and they serve to retain parts that are inserted into that bore. They create a secure boundary, preventing any axial movement of the components they hold in place. External retaining rings, on the other hand, fit around the shaft or outside of a component. These rings also create a tight fit in a groove on the exterior of a shaft, preventing components such as gears or bearings from sliding off. In summary, both types of retaining rings play crucial roles in maintaining assembly integrity by fitting tightly into grooves and preventing any unintended movement of other mechanical parts. This functionality is essential for the stability and reliability of machinery and equipment.