Equipment Maintenance Practice Test

Spinning a bearing with pressurized air leads to decreased wear due to the air's ability to create a cushion or film between moving surfaces. This cushioning effect reduces metal-to-metal contact, which is often the primary cause of wear in bearings. By minimizing direct contact, the air helps alleviate friction and heat generation, both of which can accelerate wear over time. In this way, the use of pressurized air acts as an effective method for prolonging the lifespan of the bearing and maintaining its operational integrity, ultimately contributing to better equipment performance.