🔍 Key Concepts

• Look closely at the joint where the driver shaft meets the pump shaft in the illustration, not at the impeller or bearings. • Compare visual features of a rigid/solid coupling versus couplings that use flexible or toothed elements (grid, gear, jaw). • Think about whether this pump arrangement is likely designed for misalignment flexibility or for a simple, rigid connection between two coaxial shafts.

💭 Think About

• Do you see any separate flexible element, teeth, or grid between two hubs, or does the illustration show one continuous, solid piece connecting the shafts? • Which of the listed coupling types would clearly show meshing teeth or an elastomer insert if it were drawn in section like this? • If a coupling is meant to accommodate misalignment, what extra parts or shapes would you expect to see that are different from a plain sleeve or flange connection?

✅ Before You Answer

• Identify exactly where the coupling is located in GS-0143 (between the pump shaft and the driving member) before deciding. • Check whether the coupling in the figure has gear teeth, a serpentine grid, or jaw-shaped fingers with an insert — if you don’t see those, rule out the matching options. • Ask yourself if the connection shown appears one-piece and rigid or made of multiple interacting flexible components; match that observation to the closest choice.