Which of the following problems will occur...

Question 1 / 205eccefa2bacbc34ba4d47852

Question 1 of 205eccefa2bacbc34ba4d47852

Which of the following problems will occur if the needle valve in a fuel injection nozzle sticks in the open position?

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Question 1 of 20

5eccefa2bacbc34ba4d47852

Which of the following problems will occur if the needle valve in a fuel injection nozzle sticks in the open position?

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🔍 Key Concepts

• Function of a fuel injection nozzle needle valve in a diesel engine • What happens inside the cylinder if fuel continues to flow when it should be shut off • Difference between normal injection timing vs. leakage or dribbling from a nozzle

💭 Think About

• Think about what the needle valve is supposed to do during each injection event and what happens if it cannot close. • Consider whether a stuck-open needle valve would completely stop fuel delivery, change the timing only, or cause fuel to continue flowing when it should not. • Ask yourself where excess fuel from a nozzle normally goes and whether that path is designed for small control leaks or full injection flow.

✅ Before You Answer

• Review how the needle valve controls start and stop of injection in a pressure-type fuel injector. • Verify whether drain or return lines are sized for minor leakage or for full injection flow. • Check if a stuck-open needle would cause continuous dribbling into the cylinder versus normal, sharp injection at the correct time.

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Question 1 of 20

Which of the following problems will occur if the needle valve in a fuel injection nozzle sticks in the open position?

Fuel injection timing will change

Nozzle operation will be unaffected

Fuel will leak into the drain line

Fuel will not be delivered

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Question 1 / 205eccefa2bacbc34ba4d47852

Question 1 of 205eccefa2bacbc34ba4d47852

Which of the following problems will occur if the needle valve in a fuel injection nozzle sticks in the open position?

Back

Question 1 of 20

5eccefa2bacbc34ba4d47852

Which of the following problems will occur if the needle valve in a fuel injection nozzle sticks in the open position?

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