Positive Displacement Vs Centrifugal Pumps

This problem tests whether you understand two core pump types that come up often in industrial and engineering discussions. You need to know the basic operating principle of each pump, one that traps and moves fixed volumes of liquid, and one that adds energy to liquid with a rotating impeller, and then connect that mechanism to how flow and pressure behave under changing system resistance. Interviewers ask this because industrials candidates are expected to reason about equipment at a practical level, especially how operating characteristics affect performance, system design, and real-world process conditions.