In an operating diesel engine, preignition...

Question 1 / 205eccefa2bacbc34ba4d47a88

Question 1 of 205eccefa2bacbc34ba4d47a88

In an operating diesel engine, preignition can be caused by __________.

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Question 1 of 20

5eccefa2bacbc34ba4d47a88

In an operating diesel engine, preignition can be caused by __________.

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🔍 Key Concepts

• Diesel combustion process – how air is compressed and how fuel normally ignites in a diesel engine • Difference between preignition (before intended start of combustion) and afterburn/overlong injection (continuing combustion) • Causes of hot spots or abnormal ignition sources in the combustion chamber

💭 Think About

• Think about what could cause the fuel-air mixture (or fuel spray) to start burning before the fuel is supposed to ignite from normal compression heat • Which option would most likely create hot particles or surfaces in the cylinder that could light off the charge early? • For each choice, ask: does this condition tend to delay, prevent, or advance the start of normal combustion?

✅ Before You Answer

• Be clear on the term preignition = ignition that occurs too early, not delayed ignition • Eliminate any options that mainly lead to poor combustion, misfiring, or delayed ignition rather than early ignition • Focus on the option that can create abnormally high local temperatures or combustible deposits in the air charge before the normal injection point

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Question 1 of 20

In an operating diesel engine, preignition can be caused by __________.

excessively late fuel injection

oil in the air charge

water in the fuel

injection continuing after the fuel charge is ignited

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Question 1 / 205eccefa2bacbc34ba4d47a88

Question 1 of 205eccefa2bacbc34ba4d47a88

In an operating diesel engine, preignition can be caused by __________.

Back

Question 1 of 20

5eccefa2bacbc34ba4d47a88

In an operating diesel engine, preignition 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