NCCER Millwright Practice Exam

Which of the following is a characteristic of split couplings?

1. They are rigid

2. They allow for misalignment

3. They require frequent lubrication

4. They are a one-piece design

The correct answer is: They allow for misalignment

Split couplings are specifically designed to accommodate some degree of misalignment between shafts. This characteristic is crucial in mechanical systems where perfect alignment is often difficult to achieve due to inherent variability in assembly, mounting, and operating conditions. By allowing for misalignment, split couplings help reduce stress on the connected components, minimizing the risk of mechanical failure. This flexibility is essential for ensuring that the system operates smoothly, even when there are slight deviations from ideal alignment. The other characteristics listed do not apply to split couplings. For example, rigid couplings do not allow for any misalignment at all, while frequent lubrication needs and one-piece designs are not defining traits of split couplings.