Which of the listed conditions could occur...

Question 1 / 205eccefa1bacbc34ba4d47331

Question 1 of 205eccefa1bacbc34ba4d47331

Which of the listed conditions could occur if during start-up the rotor illustrated shifts radially? See illustration SE-0006.

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Question 1 of 20

5eccefa1bacbc34ba4d47331

Which of the listed conditions could occur if during start-up the rotor illustrated shifts radially? See illustration SE-0006.

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🔍 Key Concepts

• Radial shift of the rotor and how that changes clearances between the rotor lands and segments "A" • The function of the spring-loaded segments "A" compared with the separate squealer ring "D" • What happens when metal teeth rub on a rotating shaft at start-up speed (contact area, pressure, and heat)

💭 Think About

• If the rotor moves off-center, which parts in the sketch will make hard metal-to-metal contact first, and along what surfaces? • Look at how the springs are arranged behind segments "A" – do they allow the segments to move freely away from the rotor, or do they tend to keep the teeth close to the machined lands? • Is the squealer ring "D" positioned so it will definitely touch and warn the operator before any other rubbing damage can occur, or only after clearances have already closed up elsewhere?

✅ Before You Answer

• Trace the direction of possible rotor radial movement and identify where clearances would disappear first between the rotor and segments "A". • Decide whether spring compression alone is enough to prevent tooth damage when the rotor shifts, or whether the contact pressure and speed would still be severe. • Ask whether frictional heat and scoring can develop very quickly at start-up when metal teeth rub on the rotor, even over a short period of time.

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Question 1 of 20

Which of the listed conditions could occur if during start-up the rotor illustrated shifts radially? See illustration SE-0006.

The teeth in segments "A" could be sheared off as they rubbed against the sides of the machined rotor lands.

No appreciable damage would result as the segments "A" would simply move outward against spring compression.

Enough frictional heat would be produced, even in that short period of time, to cause distortion and ultimate scoring of the shaft.

None of the above as the operator would be fore warned of this situation through the action of the squealer ring "D".

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Question 1 / 205eccefa1bacbc34ba4d47331

Question 1 of 205eccefa1bacbc34ba4d47331

Which of the listed conditions could occur if during start-up the rotor illustrated shifts radially? See illustration SE-0006.

Back

Question 1 of 20

5eccefa1bacbc34ba4d47331

Which of the listed conditions could occur if during start-up the rotor illustrated shifts radially? See illustration SE-0006.

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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