In a normally operating diesel engine, the...

Question 1 / 205eccefa2bacbc34ba4d478f6

Question 1 of 205eccefa2bacbc34ba4d478f6

In a normally operating diesel engine, the main source of lubricating oil contamination in the crankcase is a result of the __________.

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Question 1 of 20

5eccefa2bacbc34ba4d478f6

In a normally operating diesel engine, the main source of lubricating oil contamination in the crankcase is a result of the __________.

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🔍 Key Concepts

• Piston rings and how they seal between the piston and cylinder wall • The path by which fuel and combustion gases might enter the crankcase • Typical causes of crankcase oil contamination in a healthy, normally operating diesel engine

💭 Think About

• Which of these choices describes something that is produced in the cylinders during normal combustion and has a realistic path into the crankcase? • Which contaminants would be present in only small amounts under normal operation versus being the primary contamination source? • Does normal, expected wear create more contamination than what can pass by the piston rings during every power stroke?

✅ Before You Answer

• Focus on what happens at the piston rings during each stroke of the engine • Consider what portion of combustion products could leak past the rings into the crankcase, even in a properly working engine • Ask yourself which option best represents a continuous, ongoing source of contamination during normal operation, not a rare or abnormal condition

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Question 1 of 20

In a normally operating diesel engine, the main source of lubricating oil contamination in the crankcase is a result of the __________.

metal particles loosened by wear

air when no air cleaners are used

condensation of water vapors

combustion by-products removed from the cylinder walls

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Question 1 / 205eccefa2bacbc34ba4d478f6

Question 1 of 205eccefa2bacbc34ba4d478f6

In a normally operating diesel engine, the main source of lubricating oil contamination in the crankcase is a result of the __________.

Back

Question 1 of 20

5eccefa2bacbc34ba4d478f6

In a normally operating diesel engine, the main source of lubricating oil contamination in the crankcase is a result of the __________.

No comments yet

Be the first to share your thoughts!

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

🔍 Key Concepts

💭 Think About

✅ Before You Answer

👋 Hi! I'm Genie, your AI study assistant. How can I help you with this question?

Quick actions

— No credit card needed