NCCER Millwright Practice Exam

What is a common result of misalignment in mechanical assemblies?

1. Reduced energy consumption

2. Increased vibration

3. Improved efficiency

4. Longer lifespan of components

The correct answer is: Increased vibration

Misalignment in mechanical assemblies typically leads to increased vibration. When components, such as shafts and bearings, are not properly aligned, it causes uneven distribution of forces and can result in oscillations. These vibrations can lead to accelerated wear on parts, potential failure of the assembly, and ultimately, increased maintenance costs. In contrast, reduced energy consumption, improved efficiency, and longer lifespan of components generally stem from proper alignment. Proper alignment ensures that mechanical systems operate smoothly, reducing friction and wear, which is essential for optimal performance and longevity. Thus, the consequence of misalignment highlighted here—heightened vibration—accurately captures a critical issue faced in mechanical assembly.