🔍 Key Concepts

• centrifugal pump construction – what parts are designed to be replaceable wear surfaces • difference between wearing rings, bearings, and lantern rings in a pump • how abrasives in the liquid affect which component takes the wear

💭 Think About

• Which pump component is intended to be sacrificial and easily replaced when erosion occurs between the impeller and casing? • Do bearings or lantern rings normally contact the pumped liquid directly, or are they usually isolated from it? • Which option is specifically associated with minimizing wear at the impeller/casing clearance in a centrifugal pump?

✅ Before You Answer

• Identify which component is a replaceable ring between impeller and casing rather than a support or sealing device • Confirm which parts normally run in contact (or near contact) with the pumped fluid • Eliminate options that mainly serve sealing or support functions rather than taking abrasive wear