🔍 Key Concepts

• Diesel engine runaway behavior and how it continues to run even if normal shutdown fails • Emergency methods for stopping a diesel engine when fuel shutoff does not work • Why maintaining lubrication to a running engine is critical for safety

💭 Think About

• If an engine won’t stop with normal controls, what is the safest immediate way to stop combustion in a diesel? • Which option, if chosen, could cause catastrophic engine damage or personal injury if applied while the engine is still turning at speed? • Which choice directly removes something the engine absolutely must have to keep running, without sacrificing necessary protection systems?

✅ Before You Answer

• Identify which option would still allow the engine to turn while removing lubrication, and think about why that’s dangerous. • Consider which option involves engaging equipment that is only meant for a stopped or barring-speed engine. • Ask yourself: which action attacks the engine’s ability to breathe and combust when other shutdown methods fail?