Raising vacuum on a main turbine unit...

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Question 1 of 205eccefa1bacbc34ba4d472da

Raising vacuum on a main turbine unit without using the turning gear will result in __________.

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Question 1 of 20

5eccefa1bacbc34ba4d472da

Raising vacuum on a main turbine unit without using the turning gear will result in __________.

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🔍 Key Concepts

• Main steam turbine construction: rotor, casing, and labyrinth packing clearances • Effects of thermal expansion when heating a stationary rotor • Purpose of turning gear during warm-up and vacuum raising

💭 Think About

• What happens to a large rotor and its clearances if you heat the turbine unevenly while it is not slowly turning? • Why is the turning gear used any time you are warming up or pulling vacuum on a main turbine unit? • Which of the choices directly relates to metal-to-metal contact or distortion caused by uneven thermal expansion?

✅ Before You Answer

• Identify which choice is specifically about rotor condition and clearances, not just accessory equipment • Ask yourself which effect would be most serious for turbine internals during warm-up from rest • Confirm which component would be most affected by uneven heating and lack of rotation: the air ejector, the time to raise vacuum, or the rotor and its seals

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Question 1 of 205eccefa1bacbc34ba4d472da

Raising vacuum on a main turbine unit without using the turning gear will result in __________.

Back

Question 1 of 20

5eccefa1bacbc34ba4d472da

Raising vacuum on a main turbine unit without using the turning gear will result in __________.

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