Exam Question
(a) Describe with the aid of a sketch, a cylinder liner for a medium speed engine (8)
(b) With reference to cylinder lubrication, explain how it is performed? What are the bad effects of feeding (8)
(i) More oil
(ii) Less oil
Class 4 (4th Engineer)
MEKM
📅 Sep 2022
Reference Answer
### (a) Cylinder Liner for a Medium Speed Engine
A cylinder liner in a medium-speed diesel engine is a critical component that forms the cylindrical space in which the piston reciprocates. It must withstand high pressures and temperatures while providing a durable, low-friction surface for the piston rings.
#### Construction and Materials
* **Material**: The liner is typically manufactured from high-grade **grey cast iron** containing free graphite in flake or spheroidal form. This composition provides excellent wear resistance and self-lubricating properties, which is crucial for the interaction with piston rings.
A cylinder liner in a medium-speed diesel engine is a critical component that forms the cylindrical space in which the piston reciprocates. It must withstand high pressures and temperatures while providing a durable, low-friction surface for the piston rings.
#### Construction and Materials
* **Material**: The liner is typically manufactured from high-grade **grey cast iron** containing free graphite in flake or spheroidal form. This composition provides excellent wear resistance and self-lubricating properties, which is crucial for the interaction with piston rings.
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