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 2024
Reference Answer
### (a) Description of Cylinder Liner Wear Measurement
Checking cylinder liners for wear is a critical maintenance procedure to assess the engine's health, prevent catastrophic failures, and maintain operational efficiency. The process involves precise measurements at specific locations:
* **Preparation**: Before measurement, the engine unit concerned must be securely stopped, crankshaft locked, and the piston in the appropriate position (typically at or near Bottom Dead Centre (BDC)) to allow full access to the liner's internal surface. The combustion space and liner surface must be thoroughly cleaned of carbon deposits and oil residues to ensure accurate readings.
* **Tooling**: Specialized measuring instruments are employed:
Checking cylinder liners for wear is a critical maintenance procedure to assess the engine's health, prevent catastrophic failures, and maintain operational efficiency. The process involves precise measurements at specific locations:
* **Preparation**: Before measurement, the engine unit concerned must be securely stopped, crankshaft locked, and the piston in the appropriate position (typically at or near Bottom Dead Centre (BDC)) to allow full access to the liner's internal surface. The combustion space and liner surface must be thoroughly cleaned of carbon deposits and oil residues to ensure accurate readings.
* **Tooling**: Specialized measuring instruments are employed:
Full answer on MeoMock — surveyor-grade reference answers for 7,000+ written exam questions.
Prepare on Android — MeoMock on Google Play