Combustion knock occurring in a diesel...

Question 1 / 205eccefa2bacbc34ba4d478cb

Question 1 of 205eccefa2bacbc34ba4d478cb

Combustion knock occurring in a diesel engine can be caused by __________.

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Question 1 of 20

5eccefa2bacbc34ba4d478cb

Combustion knock occurring in a diesel engine can be caused by __________.

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🔍 Key Concepts

• ignition lag in diesel engines (time between start of injection and start of combustion) • how fuel accumulation in the cylinder affects rate of pressure rise and knocking • difference between short vs long ignition delay and their effect on smoothness vs knocking

💭 Think About

• Think about what happens if fuel is injected but does not ignite immediately—what builds up in the cylinder, and what happens when it finally does ignite? • Which option(s) describe a condition where a large amount of fuel is ready to burn all at once, causing a rapid pressure rise? • How would shortening the ignition delay vs lengthening it change the violence (or smoothness) of combustion?

✅ Before You Answer

• Make sure you understand that ignition lag/ignition delay is a time interval, not a fuel quantity. • Check which choice(s) increase the amount of fuel present before combustion actually starts—this strongly relates to knocking. • Verify that reduced ignition lag would tend to make combustion more immediate and controlled, not delayed and explosive.

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Question 1 of 20

Combustion knock occurring in a diesel engine can be caused by __________.

excessive fuel penetration

prolonged injection lag

reduced ignition lag

prolonged ignition lag

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Question 1 / 205eccefa2bacbc34ba4d478cb

Question 1 of 205eccefa2bacbc34ba4d478cb

Combustion knock occurring in a diesel engine can be caused by __________.

Back

Question 1 of 20

5eccefa2bacbc34ba4d478cb

Combustion knock occurring in a diesel engine can be caused by __________.

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