Class 4 (4th Engineer) MEKM 📅 Mar 2023

Exam Question

(a) Draw simple sketch of a crank shaft, with names of the different parts of the crank shaft (8)

(b) Describe funciton on crankshaft of 2-stroke diesel engine (4)

Reference Answer

### (a) Sketch of a Crankshaft with Parts Labeled (8 Marks)
A simple, clear line sketch of a semi-built or fully-built crankshaft is required, with the following parts clearly labeled:
1. **Main Bearing Journal:** The part of the shaft that rests on and rotates within the main bearings, located on the engine's bedplate.
2. **Crankpin (Big End Bearing Journal):** The journal to which the connecting rod's big end is attached.

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