Certified Maintenance and Reliability Technician (CMRT) Practice Test

Angular-contact ball bearings are typically mounted in opposition to optimize load handling and performance. This arrangement allows the bearings to support both axial and radial loads effectively. When mounted in opposition, the arrangement creates a more stable load distribution, particularly in applications where high axial loads are present. The design helps in minimizing the tendency for misalignment and provides better rigidity, which is particularly beneficial in high-speed and high-precision applications.

The other arrangements, such as parallel and series, do not provide the same load distribution benefits. Parallel mounting may not effectively manage axial loads, while series mounting can lead to increased friction and wear between the components. Random mounting lacks any systematic support structure, which can result in unpredictable performance and increased risk of failure. The opposition configuration specifically enhances the bearing's functionality by enabling it to handle combined loads more efficiently.