🔍 Key Concepts

• Diesel engine crankcase purpose and what can accumulate there • Difference between removing gases vs preventing formation of gases • What a blower / ventilation device normally does in an engine system

💭 Think About

• Ask yourself: What actually causes combustible gases to be present in a crankcase in the first place? Can a ventilation system stop that cause from ever happening? • Think about the normal job of any blower or fan in machinery spaces – does it change the chemistry of gases, or does it move them from one place to another? • Which options describe functions that are clearly unrelated to gas movement or ventilation?

✅ Before You Answer

• Verify which choice is specifically about moving or exhausting gases from the crankcase. • Eliminate any options that talk about changing how gases form rather than how they are handled after they form. • Rule out options that describe functions handled by separate systems (e.g., oil coolers, starting aids), not by a crankcase ventilation blower.