🔍 Key Concepts

• Condensate pumps are usually used on the low‑pressure, low‑NPSH (Net Positive Suction Head) side of a steam cycle • How pump suction conditions (flash/entrained vapor) influence impeller and suction design • Differences between open vs. closed impellers and single vs. multiple impeller arrangements

💭 Think About

• Think about where condensate pumps sit in a steam system and what kind of suction conditions they must handle—how would that affect the impeller and suction design? • Which design feature would help a pump deal with relatively low suction head and possible vapor formation without losing prime? • Look at each choice and ask: which one most clearly matches a characteristic that would be visually obvious and commonly associated with condensate pumps?

✅ Before You Answer

• Identify which option clearly relates to handling low NPSH / flashing conditions on the suction side • Eliminate any features that are more typical of speed control or high‑head multistage pumps rather than condensate service • Focus on the feature that would be the most visually distinctive when looking at the outside or inlet of the pump