Which kind of propeller pump moves fluid only by the propelling or lifting action of the blades on the fluid?

Which kind of propeller pump moves fluid only by the propelling or lifting action of the blades on the fluid?

• A. Mixed flow
• B. Axial flow
• C. Centrifugal flow
• D. Reciprocating flow

Answer: (B)

The type of propeller pump that moves fluid primarily through the propelling or lifting action of the blades on the fluid is the axial flow pump. In an axial flow pump, the fluid enters the pump parallel to the axis of the impeller, and the rotating blades impart kinetic energy to the fluid, pushing it along the same axis. This results in a lifting action that directly translates to the movement of the fluid in a straight line, making it efficient for applications requiring high flow rates with relatively low heads. In contrast, mixed flow pumps combine features of both axial and centrifugal pumps, drawing fluid at an angle to the impeller and generating both axial flow and pressure through centrifugal action. Centrifugal flow pumps utilize a rotating impeller to increase the fluid's velocity, primarily generating lift through centrifugal force rather than blade action alone. Reciprocating pumps, meanwhile, use a piston mechanism to move fluid, which is fundamentally different from propeller action and does not utilize rotating blades. Thus, the axial flow pump stands out as the type that exclusively relies on the propelling action of its blades to move fluid along, aligning perfectly with the question's criteria.

The type of propeller pump that moves fluid primarily through the propelling or lifting action of the blades on the fluid is the axial flow pump. In an axial flow pump, the fluid enters the pump parallel to the axis of the impeller, and the rotating blades impart kinetic energy to the fluid, pushing it along the same axis. This results in a lifting action that directly translates to the movement of the fluid in a straight line, making it efficient for applications requiring high flow rates with relatively low heads.

In contrast, mixed flow pumps combine features of both axial and centrifugal pumps, drawing fluid at an angle to the impeller and generating both axial flow and pressure through centrifugal action. Centrifugal flow pumps utilize a rotating impeller to increase the fluid's velocity, primarily generating lift through centrifugal force rather than blade action alone. Reciprocating pumps, meanwhile, use a piston mechanism to move fluid, which is fundamentally different from propeller action and does not utilize rotating blades.

Thus, the axial flow pump stands out as the type that exclusively relies on the propelling action of its blades to move fluid along, aligning perfectly with the question's criteria.