Which symptom indicates cavitation onset in hydraulic turbines?

💡 Explanation

Reduced turbine efficiency indicates cavitation because vapor bubble formation and collapse remove power through turbulent energy dissipation rather than transferring it to mechanical rotation; therefore, efficiency drops, rather than viscosity changing or oxygenation increasing.

• Which failure mode increases with prolonged exposure to chlorides in reinforced concrete beams supporting a marine pier?
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• Which risk significantly increases for forged steel components in persistently humid environments?
• Which consequence results when fuel injectors operate at a lean setting?
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