Which risk increases when an engine crankshaft operates continuously at its critical speed?

💡 Explanation

When a crankshaft operates at its critical speed, torsional resonance occurs because the excitation frequency matches a natural frequency, amplifying vibrations causing extreme stress on bearings which may lead to their premature failure. Therefore bearing failure results rather than piston wear, injector issues, or valve float which stem from unrelated engine conditions.

• Which consequence results when capacitor bank switching causes transient overvoltages in utility scale electrical grids?
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