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Class 4 (4th Engineer) MEP 📅 Apr 2025

Exam Question

(a) Describe how leak in a heat exchanger tube is detected? How to rectify leaky tube? (8) 

(b) What are the common methods to enhance heat transfer of heat exchanger? (4) 

(c) Describe reasons for poor performance of heat exchanger and actions to rectify the same. (4) 

Reference Answer

### (a) Detection and Rectification of Leaks in Heat Exchanger Tubes
A heat exchanger leak can significantly impair performance, lead to cross-contamination of fluids, and pose safety hazards. Detecting and rectifying such leaks promptly is crucial for the continuous and efficient operation of marine machinery.
#### **1. Leak Detection Methods**
Several methods are employed to detect leaks in heat exchanger tubes, ranging from simple visual inspections to advanced non-destructive testing techniques:

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