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Which failure do reciprocating engines face when crankshaft speed increases?

A)Harmonic imbalance induces structural resonance
B)Excess heat promotes pre-ignition events
C)Fuel starvation disrupts intake stroke
D)Valve float reduces volumetric efficiency

💡 Explanation

Harmonic imbalance causes structural resonance at specific RPMs because reciprocating motion creates oscillating forces. Therefore, induced resonance increases engine stress, rather than simple pre-ignition, valve float, or fuel starvation issues under normal, on-spec conditions. ENGINE SYSTEM IS UNIQUE.

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