Class 2 (2nd Engineer) MEKG 📅 Nov 2022

Exam Question

(a) Sketch a transmission shaft coupling which enables the propeller shaft to be withdrawn outboard.

(b) (i) Describe the coupling and the method of fitting and dismantling.

(ii) State how the grip of the coupling can be checked when fitted.

(iii) State what safety precaution should be taken when dismantling the coupling.

Reference Answer

### (a) Sketch of a Transmission Shaft Coupling (Hydraulic Muff Coupling)
*(A detailed, labelled, cross-sectional sketch is required for full marks. The sketch should clearly illustrate the following components:)*
* **Propeller Shaft & Intermediate Shaft:** Showing the abutted ends.
* **Inner Sleeve:** A thin-walled sleeve with a tapered outer surface and a parallel bore slightly larger than the shaft diameter.

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