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Class 4 (4th Engineer) MEKG 📅 Nov 2023

Exam Question

(a) State the advantages and disadvantages in using a centrifugal pump on ship's duties. (4)

(b) How should a centrifugal pump be operated, inorder to get best results? (5)

(c) State maintenance schedule for the pump. What parts of the pump are closely checked during surveys? (7)

Reference Answer

### (a) Advantages and Disadvantages of a Centrifugal Pump
**Advantages (4 Marks):**
* **Simple Construction & High Reliability:** Consists of very few moving parts, primarily the impeller and shaft assembly. This simplicity leads to lower manufacturing costs, reduced maintenance requirements, and greater operational reliability compared to positive displacement pumps.
* **Smooth, Continuous Flow:** The pump delivers a uniform, non-pulsating flow of liquid, which is ideal for systems sensitive to pressure fluctuations. This characteristic is essential for services like cooling water circulation and ballast transfer.

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