🔍 Key Concepts

• Purpose of an overspeed trip in diesel engines • Difference between fuel, lube oil, and cooling water protective devices • What engine condition can cause immediate mechanical damage if not stopped quickly

💭 Think About

• Which of the listed problems would damage the engine the fastest if not stopped almost instantly? • Which conditions are usually protected by shutdowns or alarms, and which one needs a very rapid automatic trip? • Think about the word overspeed itself—what engine parameter is ‘speed’ referring to?

✅ Before You Answer

• Match overspeed trip to the specific parameter it monitors (fuel, pressure, temperature, or speed). • Decide which answer describes a condition that requires instant automatic stop, not just an alarm. • Recall that lube oil and cooling water issues are often first indicated by pressure/temperature alarms, not necessarily a dedicated overspeed device.