🔍 Key Concepts

• centrifugal pump bearings and what mainly causes them to fail prematurely • the effect of shaft alignment on bearings vs. the effect of internal clearances like wearing rings • which problems would mainly affect pump performance or seal operation rather than directly damaging bearings

💭 Think About

• Ask yourself: which condition would put continuous side‑load or stress on the pump shaft, causing the bearings to run hot and wear out often? • Which choice would more likely show up first as loss of capacity or pressure instead of rapid bearing failure? • Think about which issue is most directly connected to mechanical fit between the driver (motor/turbine) and the pump itself.

✅ Before You Answer

• Identify which option most directly creates excess radial or angular load on the shaft and bearings. • Separate problems that mainly affect hydraulic performance (capacity/pressure) from those that mechanically overload bearings. • Consider common real‑world causes of repeated bearing replacement in rotating machinery (motors, pumps, fans).