🔍 Key Concepts

• Identify the type of pump shown (notice the rotor with many radial vanes inside an off-center casing). • Recall the typical uses and limitations of this pump type: what kind of fluid (liquid vs vapor), what viscosity range, and usual pressure levels. • Consider how speed (RPM) usually affects efficiency and wear in this style of rotary positive-displacement pump.

💭 Think About

• From the illustration, ask yourself: does this look more like a centrifugal impeller, a gear pump, or a rotary vane pump? That will narrow what it is best at. • Think about which of the four statements strongly matches the normal textbook description of that pump type, and which ones sound more like descriptions of other pumps (e.g., gear, piston, or centrifugal). • Ask: is this pump normally used for hydraulic oil systems, for vacuum/gas service only, or for general liquid transfer of moderate-viscosity fluids?

✅ Before You Answer

• Be sure you can name the pump type before you pick an option; if you can’t, re‑examine the vanes and eccentric casing. • Double-check which option describes a function that would be unsafe or inefficient for a vane-type rotary pump (for example, extremely high pressure or extremely viscous fluids). • Confirm from your notes whether this pump is usually described as self‑priming liquid pump or as a vacuum/gas pump, and match that with the choices.