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
📅 May 2024
Reference Answer
### (a) Excessively Hot Discharge Pipe
An excessively hot discharge pipe indicates a higher than normal final discharge temperature. This is a critical symptom that can lead to lubrication oil breakdown, carbonization, and potentially, in extreme cases, an air line explosion.
**Reasons:**
1. **Defective Cooling System:** The primary reason for overheating is a failure in the cooling system. This can be due to:
An excessively hot discharge pipe indicates a higher than normal final discharge temperature. This is a critical symptom that can lead to lubrication oil breakdown, carbonization, and potentially, in extreme cases, an air line explosion.
**Reasons:**
1. **Defective Cooling System:** The primary reason for overheating is a failure in the cooling system. This can be due to:
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