Class 4 (4th Engineer) MEKG 📅 Sep 2025

Exam Question

(a) What are the different types of coupling bolts used in practice? Name at least 3. (3)

(b) Explain with the help of sketch, as to how a 'pilgrim' hydraulic bolt is fitted and removed? (8)

Reference Answer

### (a) Different Types of Coupling Bolts
Based on common marine practice and the provided information, three primary types of coupling bolts are used to connect shaft flanges:
1. **Fitted Bolt (Parallel Shank Bolt):**
* **Description:** This is a solid, parallel-shank bolt machined to a very precise diameter to be an interference or close-clearance fit in the reamed holes of the coupling flanges.

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