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← TechnologyWhich outcome occurs when excessive thermal stress weakens a marine diesel engine crankshaft?
A)Torsional vibration increases rapidly✓
B)Fuel injector timing drifts randomly
C)Cylinder head pressure stabilizes
D)Exhaust gas temperature decreases
💡 Explanation
Increased torsional vibration occurs because crankshaft fatigue results in reduced stiffness, promoting resonance near operational frequencies. Therefore, vibration increases, rather than injector timing drifting or other performance metrics remaining stable after material fatigue presents and the *torsional vibration* accelerates.
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