Class 4 (4th Engineer) SC&S 📅 Aug 2022

Exam Question

(a) The vessel upon which you are serving is about enter drydock and as fourth engineer you are asked to inspect the rudder for faults. Sketch a rudder and indicate on the sketch possible defects (10)

(b) Explain why EACH of the defects discovered in (a) are important (6)

Reference Answer

### Part (a) Rudder Inspection and Sketch of Possible Defects
A thorough inspection of the rudder and its associated components is critical before entering drydock to plan for necessary repairs. The sketch would show a semi-balanced rudder assembly, and the following potential defects would be indicated on it:
1. **Bent or Twisted Rudder Stock:** Indicated along the vertical length of the rudder stock, from the steering gear room down to the blade coupling.
2. **Cracked or Corroded Rudder Stock:** Marked at high-stress areas, such as the keyway, the connection to the tiller, and just above the rudder blade where bending moments are highest.

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