What is the maximum temperature rise across a bearing on an operating main feed pump?

The correct answer is based on the operational standards for bearings in main feed pumps, which are critical components in a machinery system where lubrication and heat dissipation are essential for longevity and performance. The maximum allowable temperature rise across a bearing on an operating main feed pump is typically recognized as 50°F.

This threshold is set to ensure that the bearings operate within a safe temperature range to prevent premature wear and failure. Operating above this limit may increase the risk of lubrication breakdown and thermal deformation, compromising the integrity of the bearings and potentially leading to catastrophic failure of the pump system. By maintaining a temperature rise at or below 50°F, proper lubrication can be maintained and the operational efficiency of the pump can be optimized.

This standard is important in a variety of scenarios, including naval operations where maintaining the performance of critical systems is crucial for safety and efficiency.