Class 4 (4th Engineer) MEKG 📅 Oct 2023

Exam Question

With reference to centrifugal pumps:

(a) (i) Sketch typical discharge characteristics showing variation of throughput as the discharge head and speeds are altered (4)

(ii) Explain why this characteristic profile is desirable (4)

(b) Explain the relevance of discharge characteristic for the selection of an emergency fire pump. (8)

Reference Answer

### (a) (i) Sketch of Typical Discharge Characteristics
A diagram showing the typical performance characteristics of a centrifugal pump is required. The sketch should illustrate the relationship between several key parameters:
* **Axes:**
* **Y-axis (Vertical):** Total Head (H) in meters, Power (P) in kW, and Efficiency (η) in %.

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