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What consequence results when a crankshaft twists beyond its elastic limit?

A)Permanent deformation becomes uncontrollable vibration
B)Lubrication oil thickens considerably and gels
C)Ignition timing advances automatically quickly
D)Fuel to air mixture spontaneously lean shifts

💡 Explanation

Permanent deformation causes uncontrollable vibration, because exceeding the crankshaft's torsional limits leads to plastic deformation; therefore, vibration increases, rather than temporary thickening of oil or altered combustion events from an intact crankshaft signal.

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