The diesel engine shown in the illustration...

Question 1 / 2707066636eef28f7522a1c51f9ad

Question 1 of 2707066636eef28f7522a1c51f9ad

The diesel engine shown in the illustration is provided with an auxiliary blower to __________. Illustration MO- 0003

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Question 1 of 27070

The diesel engine shown in the illustration is provided with an auxiliary blower to __________. Illustration MO- 0003

If the question has a related picture, it will appear here.

🔍 Key Concepts

• Location and purpose of the auxiliary blower in a turbocharged two-stroke diesel engine air system • Difference between scavenge air system and crankcase space • How scavenge air pressure changes between low load and full load when using a turbocharger

💭 Think About

• Look closely at where the blower in the illustration takes suction from and where it discharges. Is it connected to the crankcase or to the scavenge air receiver/ports? • Think about turbocharger operation: at which load condition does the turbocharger naturally produce enough scavenge air pressure without help? At which condition does it need assistance? • Would you ever want to maintain either a strong positive pressure or a vacuum inside the crankcase of a large diesel? What are the safety and lubrication implications?

✅ Before You Answer

• Verify which part of the engine the auxiliary blower is physically connected to in the drawing – crankcase vs. scavenge air space. • Check your basic principle: turbocharger air supply at low load compared to full load. • Remember standard practice for crankcase conditions on trunk and crosshead diesels: crankcase is normally vented near atmospheric pressure, not pressurized or pulled into vacuum by a blower.

Question 1 of 27070

The diesel engine shown in the illustration is provided with an auxiliary blower to __________. Illustration MO- 0003

maintain a positive pressure on the crankcase

provide scavenge air pressure at low load

increase scavenge air pressure at full load

maintain a vacuum on the crankcase

Question 1 / 2707066636eef28f7522a1c51f9ad

Question 1 of 2707066636eef28f7522a1c51f9ad

The diesel engine shown in the illustration is provided with an auxiliary blower to __________. Illustration MO- 0003

Back

Question 1 of 27070

The diesel engine shown in the illustration is provided with an auxiliary blower to __________. Illustration MO- 0003

If the question has a related picture, it will appear here.