Exam Question
Give reasons and remedies for the following faults in air compressors.
(a) Excessively hot discharge pipe. (5)
(b) Intermediate stage relief valve lifting. (5)
(c) Noticeable reduction in free air delivery (6)
Class 4 (4th Engineer)
MEP
📅 Aug 2024
Reference Answer
### (a) Excessively Hot Discharge Pipe
An excessively hot discharge pipe indicates that the compressed air exiting the final stage of the compressor is at an abnormally high temperature. This is a critical issue as it can lead to oil carbonisation, reduced compressor efficiency, and potential fire hazards in the discharge line.
**Reasons:**
* **Insufficient Cooling Water Flow or High Temperature:**
An excessively hot discharge pipe indicates that the compressed air exiting the final stage of the compressor is at an abnormally high temperature. This is a critical issue as it can lead to oil carbonisation, reduced compressor efficiency, and potential fire hazards in the discharge line.
**Reasons:**
* **Insufficient Cooling Water Flow or High Temperature:**
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