If the valve tappets in a diesel engine are...

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Question 1 of 205eccefa1bacbc34ba4d476c7

If the valve tappets in a diesel engine are set at greater clearances than those specified by the engine manufacturer, those valves will __________.

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Question 1 of 20

5eccefa1bacbc34ba4d476c7

If the valve tappets in a diesel engine are set at greater clearances than those specified by the engine manufacturer, those valves will __________.

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🔍 Key Concepts

• Valve lash (tappet clearance) and how it affects valve motion relative to the cam lobe • Relationship between cam lobe position and the instant the valve just begins to lift off its seat • Effect of too much clearance on both the start and the end of valve opening (timing and duration)

💭 Think About

• Picture the cam lobe turning: if there is extra clearance, does the cam have to rotate more or less before it actually touches and lifts the valve? How does that affect when the valve first opens? • Once the lobe has passed its peak and is going back toward the base circle, with extra clearance, will the valve stay in contact with the lobe longer or leave it sooner? How does that affect when the valve closes? • Compare in your mind: too much clearance vs too little clearance. Which condition would make the valve stay open for a shorter time, and which answer choice best matches a shorter open duration?

✅ Before You Answer

• Be clear on what increased tappet clearance means mechanically: a bigger gap that must be taken up before the valve moves. • Verify which answer choice corresponds to a valve that is open for a shorter part of the cam rotation (reduced opening duration). • Check that the option you choose is consistent for both opening and closing behavior; the effect of greater clearance should not make one earlier and the other later in a way that contradicts the mechanics.

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Question 1 of 205eccefa1bacbc34ba4d476c7

If the valve tappets in a diesel engine are set at greater clearances than those specified by the engine manufacturer, those valves will __________.

Back

Question 1 of 20

5eccefa1bacbc34ba4d476c7

If the valve tappets in a diesel engine are set at greater clearances than those specified by the engine manufacturer, those valves will __________.

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