Class 4 (4th Engineer) MEP 📅 Oct 2023

Exam Question

A centrifugal pump has been opened up due to abnormal noise:

(a) List the checks you will carry out on various parts (4)

(b) Name the parts which may require replacement (4)

(d) Operational parameters, which may be required to be compared with manufacturers test record. (4)

Reference Answer

**(a) Checks to be carried out on various parts (4 Marks)**
Upon opening the centrifugal pump due to abnormal noise, a meticulous inspection of all components is paramount. The following checks would be systematically carried out:
* **Impeller:**
* **Visual Inspection:** Examine for signs of erosion, corrosion, and cavitation damage (pitting, localized material loss), particularly at the leading edges of the vanes and shroud surfaces. Look for cracks at the vane roots or hub.

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