🔍 Key Concepts

• Crankcase explosions and how they start (oil mist, hot spots, ignition) • Manufacturer and class society guidance on opening a crankcase after a suspected crankcase explosion risk • Why cooling time is critical before restarting or opening a diesel engine after a high crankcase pressure trip

💭 Think About

• What danger exists if you open a hot crankcase or restart a diesel engine immediately after a high crankcase pressure shutdown? • Which option best shows a cautious, safety-first approach that prevents a secondary explosion or fire? • In real life, what would a chief engineer or safety manual emphasize before letting you open or restart this engine?

✅ Before You Answer

• Verify which choice mentions adequate cooling time before either opening the crankcase or restarting the engine. • Check which options ignore the safety shutdown and suggest immediate action that could put personnel at risk. • Confirm that the chosen response includes finding and correcting the cause of the high crankcase pressure before attempting another start.