🔍 Key Concepts

• Eductor operation uses fluid flow to move another fluid (jet pump principle) • Difference between mechanical pumps (centrifugal/reciprocating) and jet-type devices • What components are required to create suction in a pump

💭 Think About

• Think about whether an eductor needs an impeller, pistons, or rotating elements to function • Consider what powers the eductor: is it driven by a motor/shaft, or by another pressurized fluid stream? • Ask yourself which answer choice describes something that would be unique to an eductor and not shared with common centrifugal or reciprocating pumps

✅ Before You Answer

• Verify which option refers to internal moving/rotating components • Eliminate any choices that could also reasonably apply to a standard centrifugal pump • Focus on the feature that explains why eductors are often used in hazardous or hard-to-access spaces (like bilges or fuel tanks) — what makes them safer there?