Question

Mixed flow pump is used for
(A). High discharge
(B). Medium head
(C). High head
(D). Low discharge
Choose the correct answer from the options given below:

• (A) and (C) only.
• (B) and (D) only.
• (A) and (B) only.
• (C) and (D) only.

Hint:

Summary of Pump characteristics:
1. Radial Flow $\rightarrow$ Low Q, High H.
2. Axial Flow $\rightarrow$ High Q, Low H.
3. Mixed Flow $\rightarrow$ High Q, Medium H.

Answer 1

The Correct Option is C

Step 1: Understanding the Concept:
Centrifugal pumps are classified based on the direction of fluid flow relative to the shaft axis: radial flow, axial flow, and mixed flow.
Detailed Explanation:
Let us analyze the operating parameters of these pump types:
- Radial flow pumps (Centrifugal): Fluid exits the impeller radially. They are used for low discharge and high heads.
- Axial flow pumps (Propeller): Fluid moves parallel to the shaft. They are used for very high discharge and low heads.
- Mixed flow pumps: The impeller design combines features of both radial and axial impellers.
Water exits the impeller at an angle between $0^\circ$ and $90^\circ$ relative to the shaft axis.
Consequently, mixed flow pumps provide a compromise: they are highly suited for applications requiring a high discharge (A) and a medium head (B).
Therefore, statements (A) and (B) represent the ideal application for mixed flow pumps.

Step 2: Final Answer:
The correct option is (C), representing (A) and (B) only.