🔍 Key Concepts

• Basic components that ALL pump types must have to move fluid • Difference between rotodynamic pumps (centrifugal, propeller) and positive displacement pumps (piston, gear, screw) • Which components are specific to only certain pump designs (like centrifugal pumps vs turbine pumps)

💭 Think About

• Look at each option and ask: does this pair of components appear in every major pump type you know (centrifugal, gear, screw, piston, diaphragm, vane)? • Identify which choices mention parts you normally associate only with centrifugal or turbine pumps—can those really apply to a piston or gear pump? • Think about the most generic description of a pump: what two broad ‘sections’ must exist in any machine that uses power to move a fluid?

✅ Before You Answer

• For each choice, check whether both listed devices occur in positive displacement pumps (like piston or gear pumps). If not, eliminate it. • Check whether the devices listed are generic functional sections (like where power goes in vs. where fluid is handled) or very specific shapes/parts (like a volute). Generic sections are more likely to be common to all pumps. • Verify which parts (e.g., volute, impeller, turbine, propeller) you have learned as being specific to centrifugal or turbine pumps, not to all pump types. Eliminate any answer that includes such specific parts.