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
📅 Jan 2025
Reference Answer
### (a) Excessively hot discharge pipe.
An excessively hot discharge pipe indicates that the compressed air is reaching abnormally high temperatures as it leaves the final compression stage. This is a critical issue as it can lead to oil carbonisation, reduced compressor lifespan, and an increased risk of auto-ignition or explosion.
**Reasons:**
* **Inefficient Cooling:**
An excessively hot discharge pipe indicates that the compressed air is reaching abnormally high temperatures as it leaves the final compression stage. This is a critical issue as it can lead to oil carbonisation, reduced compressor lifespan, and an increased risk of auto-ignition or explosion.
**Reasons:**
* **Inefficient Cooling:**
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