Class 4 (4th Engineer) MEKG 📅 Feb 2023

Exam Question

(i) For a centrifugal pump, draw its performance characteristics and clearly explain the same (6)

(ii) Draw a curve showing efficiency versus flow rate of centrifugal pump (n vs Q) (6)

(iii) What interference can be drawn from these curves (4)

Reference Answer

### (i) Centrifugal Pump Performance Characteristics
A centrifugal pump's performance characteristics are presented graphically to illustrate the relationship between the pump's capacity (Flow Rate, Q), the head it can produce (H), the power it consumes (P), and its operating efficiency (η) at a constant rotational speed (N). These curves are essential for pump selection, system design, and operational analysis.
The main components of the performance characteristic curve are:
1. **Head-Flow Rate Curve (H-Q):**

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