Class 4 (4th Engineer) MEKM 📅 Apr 2024

Exam Question

(a) Sketch a section through the bedplate and A frame of a large slow speed engine, identifying parts, method of construction and materials (10)

(b) Explain the function of the tie bolts and how after an alignment problem, these would be tightened (6)

Reference Answer

### (a) Bedplate and A-Frame: Construction, Materials, and Parts
A transverse section through a large, slow-speed marine diesel engine reveals the primary structural components that form the foundation and framework of the engine. These are the bedplate and the A-frame (or column).
#### 1. Bedplate
The bedplate is the lowermost part of the engine structure. It provides a rigid foundation, supports the crankshaft in its main bearings, and transmits the engine's static and dynamic loads to the ship's structure.

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