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← TechnologyWhich outcome occurs when rapid cylinder pressure increase induces ultrasonic waves?
A)Detonation damages piston ring lands✓
B)Valve float reduces volumetric efficiency
C)Bearing seizure halts crankshaft rotation
D)Exhaust backpressure overheats turbine blades
💡 Explanation
Detonation causes extreme pressure spikes, initiating ultrasonic waves that fatigue piston ring lands via acoustic resonance because waves cause micro-cracks, therefore weakening ring landings, rather than directly overheating other components through conventional heat transfer.
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