Class 2 (2nd Engineer) MEP 📅 Apr 2018

Exam Question

Your ship after having been accidentally grounded was taken to a dry-dock for inspection and necessary repairs were carried out. What defects would you look for in the following parts, that may have sustained damage due to grounding and suggest methods of repairs and tests that may be required to be carried out to the defects noticed:

(a) propeller and tail end shaft.

(b) Main Engine crankshaft.

Reference Answer

(a) Propeller and Tail End Shaft:
Grounding can cause damage to the propeller and tail-end shaft. Potential defects include bending, breakage, twisting, or cracks in the propeller or tail-end shaft. Propeller blades might show distortion, cracks, or even loss of sections, while the propeller cone can be damaged or misaligned. Additional issues may include damage to coupling bolts, liners, or bearings and, in extreme cases, complete detachment or loss of the propeller.
Repairs:
Tail End Shaft:

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