The two-stage pump impellers can operate in which configurations, and what else are they called?

The two-stage pump impellers can operate in which configurations, and what else are they called?

• A. Series or Parallel and also called pressure or volume
• B. Series and also called head or flow
• C. Parallel and also called speed or torque
• D. None of the above

Answer: (A)

Two-stage pump impellers can be arranged in series or in parallel to change what the pump delivers. In series, the water passes through both impellers one after the other, so the pump can develop a higher pressure (head) at roughly the same flow as a single stage. In parallel, both impellers work together to move more water, increasing the flow while the pressure (head) stays about the same as a single stage. These modes are also described as pressure or volume, with pressure corresponding to head (height of pressure) and volume corresponding to flow (gallons per minute). This is why the correct description lists series or parallel and references pressure or volume.

Two-stage pump impellers can be arranged in series or in parallel to change what the pump delivers. In series, the water passes through both impellers one after the other, so the pump can develop a higher pressure (head) at roughly the same flow as a single stage. In parallel, both impellers work together to move more water, increasing the flow while the pressure (head) stays about the same as a single stage. These modes are also described as pressure or volume, with pressure corresponding to head (height of pressure) and volume corresponding to flow (gallons per minute). This is why the correct description lists series or parallel and references pressure or volume.