🔍 Key Concepts

• Purpose of an overspeed trip on diesel and turbine engines • What happens to engine components if RPM exceeds the designed safe limit • Normal engine speed control vs emergency protective devices

💭 Think About

• Ask yourself: is an overspeed trip meant to gradually adjust speed, or to immediately protect the engine from damage? • Which action would most quickly and reliably prevent further increase in engine RPM? • Does an overspeed trip usually try to keep the engine running safely, or is it designed to sacrifice operation to protect machinery and personnel?

✅ Before You Answer

• Identify which choices completely stop the engine versus those that only reduce speed • Consider which system (cooling water, air intake, or fuel) directly controls how fast the engine can turn • Verify that an overspeed device is a safety shutdown mechanism, not a normal speed governor or fine‑tuning control