Exam Question
Describe with the aid of suitable graph, the discharge characteristics of a centrifugal pump. Explain why it does not require a relief valve. (16)
Class 4 (4th Engineer)
MEKG
📅 Mar 2025
Reference Answer
A centrifugal pump operates based on the principle of converting rotational kinetic energy into the hydrodynamic energy of the fluid flow. Its discharge characteristics are crucial for understanding its performance and application. These characteristics are typically represented by performance curves plotting Head (H), Efficiency (η), Brake Horsepower (BHP), and Net Positive Suction Head Required (NPSHr) against Capacity (Q) or flow rate.
### Discharge Characteristics of a Centrifugal Pump
#### 1. Head-Capacity (H-Q) Curve
* **Description**: This curve shows the total head developed by the pump at various flow rates (capacity). It is the most fundamental characteristic curve.
### Discharge Characteristics of a Centrifugal Pump
#### 1. Head-Capacity (H-Q) Curve
* **Description**: This curve shows the total head developed by the pump at various flow rates (capacity). It is the most fundamental characteristic curve.
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