🔍 Key Concepts

• Purpose of crankcase ventilation in diesel engines • How combustible crankcase gases are managed • Difference between measuring, preventing, and removing gases

💭 Think About

• What actually happens to vapors and fumes that build up inside a diesel crankcase during normal operation? • Does this system mainly measure, eliminate, or chemically change the gases inside the crankcase? • Which option describes a continuous, ongoing process rather than a one-time event?

✅ Before You Answer

• Identify the main safety hazard inside a crankcase (think about oil mist and vapors). • Decide whether ventilation systems usually remove something, monitor something, or create something new. • Eliminate any answers that describe functions normally done by separate systems (e.g., gas detection, inert gas systems).