Exam Question
(a) Describe how cylinder liners are checked for wear. (5)
(b) Explain how these measurements are recorded. (5)
(c) Explain why allowance for wear is limited and what extent of the wear governs liner replacement. (6)
Class 4 (4th Engineer)
MEP
📅 Aug 2025
Reference Answer
### (a) Procedure for Checking Cylinder Liner Wear (5 Marks)
A systematic and precise procedure is followed to measure cylinder liner wear, ensuring safety, accuracy, and repeatability. This is typically performed during a major overhaul or as per the Planned Maintenance System (PMS) schedule.
**1. Preparation and Safety:**
* **Isolation:** The engine is stopped, and all starting systems (air, electrical) are isolated and locked out (LOTO). The 'Engine Under Repair' notice is posted.
A systematic and precise procedure is followed to measure cylinder liner wear, ensuring safety, accuracy, and repeatability. This is typically performed during a major overhaul or as per the Planned Maintenance System (PMS) schedule.
**1. Preparation and Safety:**
* **Isolation:** The engine is stopped, and all starting systems (air, electrical) are isolated and locked out (LOTO). The 'Engine Under Repair' notice is posted.
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