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Q9. (a) Describe how it is determined whether a crankshaft was twisted during a major “smash up” in a main engine. (b) Explain where twisting is most likely to occur. (c) Specify with reasons the degree of twisting that might be accommodated without correction (d) Explain briefly what adjustments and precautions should be instituted when putting an engine with a twisted crankshaft back into service.