Combustion knock can occur in the cylinders...

Question 1 / 205eccefa2bacbc34ba4d478ca

Question 1 of 205eccefa2bacbc34ba4d478ca

Combustion knock can occur in the cylinders of a diesel engine under any condition permitting __________.

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Question 1 of 20

5eccefa2bacbc34ba4d478ca

Combustion knock can occur in the cylinders of a diesel engine under any condition permitting __________.

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🔍 Key Concepts

• Diesel combustion process – what happens between fuel injection and actual ignition • Ignition delay period – how the length of this delay affects pressure rise in the cylinder • Pressure rise / knocking – why a sudden, large pressure increase causes knock

💭 Think About

• Think about what must build up inside the cylinder before a sudden, violent ignition can occur. • Which option would allow a large amount of fuel to be present and then ignite almost all at once, causing a sharp pressure spike? • In a diesel engine, does knock usually come from fuel burning too slowly and gently, or from fuel igniting too quickly after accumulating?

✅ Before You Answer

• Identify which choice leads to a lot of fuel accumulating before ignition, rather than smooth, progressive burning. • Eliminate any option that would cause fuel to burn more smoothly and gradually instead of all at once. • Ask: which condition best matches a sudden, sharp pressure rise in the cylinder, characteristic of knock?

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Question 1 of 20

Combustion knock can occur in the cylinders of a diesel engine under any condition permitting __________.

a shortened ignition delay period

a lean fuel/air mixture

excess fuel in the combustion chamber

rapid vaporization of injected fuel droplets

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Question 1 / 205eccefa2bacbc34ba4d478ca

Question 1 of 205eccefa2bacbc34ba4d478ca

Combustion knock can occur in the cylinders of a diesel engine under any condition permitting __________.

Back

Question 1 of 20

5eccefa2bacbc34ba4d478ca

Combustion knock can occur in the cylinders of a diesel engine under any condition permitting __________.

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