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Q8. a) (i) Describe with the aid of a sketch, one section of a large slow speed engine crankshaft which has been assembled by shrinkage of webs onto journal pins. (4)

(ii) Explain how a five-degree twist might be caused to a shaft assembled by shrinkage. (4)

b) State the possible effects of a five - degree twist in the crankshaft assembly and draw conclusions as to whether the engine should be operated and any adjustments that may be necessary for continued operation. Assume that the incident has occurred at a port with no repair facilities. (8)