CWEA Maintenance Technologist Practice Test

Which type of fit is most suitable for machinery that requires precision alignment and high load capacity?

1. Loose fit

2. Press fit

3. Sliding fit

4. Free fit

The correct answer is: Press fit

The most suitable type of fit for machinery that requires precision alignment and high load capacity is the press fit. A press fit is an assembly where one part is pressed into another, creating an interference fit that ensures a tight connection. This type of fit is crucial in applications where alignment is critical, as the force of the press fit maintains the position and orientation of the components under load. Press fits are designed to accommodate high levels of stress and are often used in heavy equipment and precision machinery where the parts must stay connected under various operating conditions. This fit provides the necessary friction to resist movement and maintain stability, which is vital in applications requiring both precision and reliability. In contrast, other fit types like loose fit and free fit do not provide the necessary tightness for load-bearing applications and can lead to misalignment or wear over time. A sliding fit may allow for some degree of movement, which is not ideal for applications needing precision. Thus, press fit stands out as the most effective choice for ensuring both alignment and load capacity in machinery.