Exam Question

**(a) Checks to be carried out on various parts during overhaul:**
When a centrifugal pump is opened up, a systematic inspection of each component is crucial. The following checks would be performed:
* **Pump Casing (Volute/Casing Cover):**
* **Erosion and Corrosion:** Thoroughly inspect the internal surfaces, especially the volute tongue (cutwater) and discharge nozzle, for signs of erosion, corrosion, or cavitation pitting. Cavitation often manifests as a honeycomb-like texture.