Which of the following statements describes...

Question 1 / 205eccefa1bacbc34ba4d47674

Question 1 of 205eccefa1bacbc34ba4d47674

Which of the following statements describes the operational characteristics of figure "B" shown in the illustration? See illustration MO-0045.

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Question 1 of 20

5eccefa1bacbc34ba4d47674

Which of the following statements describes the operational characteristics of figure "B" shown in the illustration? See illustration MO-0045.

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🔍 Key Concepts

• Look at how the cam lobe in figure B is shaped compared to a perfect circle – the ‘fat’ side versus the ‘steep’ side shows how fast the follower (and valve) moves. • Think about what a gradual rise on the cam profile does to valve motion (slow, smooth lift) versus a sharp drop-off (quick, abrupt closing). • Relate the direction of rotation (arrow) to which side of the cam controls valve opening and which side controls valve closing (reseating).

💭 Think About

• As the cam in figure B turns in the direction of the arrow, does the follower climb up a long, gentle ramp or a short, steep ramp to reach full lift? What does that mean for how quickly the valve opens? • When the cam rotates past maximum lift, does the follower drop off the lobe quickly or follow a long, gentle slope down? What does that tell you about how the valve reseats? • Which choice best matches a cam that has an asymmetric shape – one side long and gradual, the other side short and steep – in terms of opening versus closing speed?

✅ Before You Answer

• Verify which side of the cam (leading edge vs trailing edge, relative to the arrow) corresponds to valve opening and which to valve closing. • Check whether figure B shows a long, gradual arc on the approach to maximum lift or on the return to the base circle – that tells you which action is slow. • Before picking an answer, confirm that your choice clearly states which part is slow (opening or reseating) and which part is abrupt/quick, matching what you see on figure B.

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Question 1 of 20

Which of the following statements describes the operational characteristics of figure "B" shown in the illustration? See illustration MO-0045.

The valve will lift abruptly, and reseat gradually.

Full valve opening will occur slowly, but reseat quickly.

Full valve opening will occur slowly, but abruptly reseat.

The valve gear will not bounce.

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Question 1 / 205eccefa1bacbc34ba4d47674

Question 1 of 205eccefa1bacbc34ba4d47674

Which of the following statements describes the operational characteristics of figure "B" shown in the illustration? See illustration MO-0045.

Back

Question 1 of 20

5eccefa1bacbc34ba4d47674

Which of the following statements describes the operational characteristics of figure "B" shown in the illustration? See illustration MO-0045.

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