Class 4 (4th Engineer) MEP 📅 Apr 2025

Exam Question

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

(a) List the checks you will carry out on the various components; (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 Components
Upon opening a centrifugal pump due to abnormal noise, a systematic and thorough inspection of all internal components is mandatory. The following checks should be performed:
1. **Bearings and Bearing Housings:**
* **Visual Inspection:** Check bearings (typically deep groove ball bearings or angular contact bearings) for signs of pitting, spalling, flaking on raceways and rolling elements, and discoloration (blueing) indicating overheating.

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