Figure "C" shown in the illustration...

Question 1 / 205eccefa1bacbc34ba4d475ed

Question 1 of 205eccefa1bacbc34ba4d475ed

Figure "C" shown in the illustration correctly identifies the position of the journal when the shaft is __________. See illustration GS-0121.

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Question 1 of 20

5eccefa1bacbc34ba4d475ed

Figure "C" shown in the illustration correctly identifies the position of the journal when the shaft is __________. See illustration GS-0121.

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🔍 Key Concepts

• Behavior of a journal bearing as speed increases (rest, starting, accelerating, normal running) • How the oil wedge (hydrodynamic film) supports the shaft and shifts the journal away from the load • Relationship between journal position, clearance, and the amount of metal-to-metal contact

💭 Think About

• Look at Figure C: compared with the other figures, is the journal closer to the bearing shell in one area or more nearly centered all around? What does that tell you about the thickness of the oil film? • Under a steady vertical load (weight of the shaft), when would you expect the journal to sit almost directly at the bottom of the bearing, and when would you expect it to be lifted up and slightly offset by the oil wedge? • Think about the moment when the shaft is just starting to turn versus when it has built up full hydrodynamic pressure: in which case is the journal most squeezed to one side, and in which case is it better supported and more evenly separated from the bearing?

✅ Before You Answer

• Compare how uniform the clearance is between journal and bearing in all four sketches; more uniform clearance usually means more stable, fully developed lubrication. • Note the direction of rotation arrow and where the smallest clearance (tightest gap) is located relative to the direction of rotation and the vertical load. • Decide in which operating condition there is likely to be the thickest, most complete oil film around the journal, and match that to the figure that shows the journal most nearly centered.

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Question 1 of 20

Figure "C" shown in the illustration correctly identifies the position of the journal when the shaft is __________. See illustration GS-0121.

just at the moment prior to being stopped

just beginning to rotate

increasing its speed to required operating speed

operating at its normal operating speed

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Question 1 / 205eccefa1bacbc34ba4d475ed

Question 1 of 205eccefa1bacbc34ba4d475ed

Figure "C" shown in the illustration correctly identifies the position of the journal when the shaft is __________. See illustration GS-0121.

Back

Question 1 of 20

5eccefa1bacbc34ba4d475ed

Figure "C" shown in the illustration correctly identifies the position of the journal when the shaft is __________. See illustration GS-0121.

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?

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— No credit card needed