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- Third Assistant Engineer (Steam-Motor-Gas Turbine Plants (Unlimited)) »
- Q531 - Motor Plants I
88. Which of the terms listed below represents the operational speed at which excessive engine vibration is created?
Critical speed is the rotational speed at which resonance occurs, causing excessive vibration due to matching the system's natural frequency. This term specifically describes the operational speed at which excessive engine vibration is created, unlike maximum speed, design maximum speed, or non-harmonic speed, which refer to unrelated speed concepts.
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