When securing a main propulsion turbine...

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Question 1 of 2066636ef128f7522a1c52190f

When securing a main propulsion turbine equipped with carbon packing glands, the vacuum should always be broken before securing the gland seal steam because __________.

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Question 1 of 20

66636ef128f7522a1c52190f

When securing a main propulsion turbine equipped with carbon packing glands, the vacuum should always be broken before securing the gland seal steam because __________.

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🔍 Key Concepts

• carbon packing glands purpose and construction • effects of rapid temperature change on brittle sealing materials • relationship between vacuum in the casing and what flows through the glands (air/steam)

💭 Think About

• Think about what happens to the carbon packing and its seating surfaces if relatively cold outside air is suddenly pulled into a hot turbine under vacuum. • Consider the direction of flow through the glands when there is vacuum inside the turbine and when there is no vacuum—what changes if you shut off the gland seal steam first? • Which option describes a problem that is directly related to the material and function of carbon packing, rather than to general condensate or drain system behavior?

✅ Before You Answer

• Identify the primary function of gland sealing steam on a turbine operating under vacuum. • Recall the material properties of carbon rings/segments—how do they respond to thermal shock or distortion? • Eliminate choices that mainly involve water flooding remote components and focus on the option that deals with the condition right at the gland itself.

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Study

Question 1 of 2066636ef128f7522a1c52190f

When securing a main propulsion turbine equipped with carbon packing glands, the vacuum should always be broken before securing the gland seal steam because __________.

Back

Question 1 of 20

66636ef128f7522a1c52190f

When securing a main propulsion turbine equipped with carbon packing glands, the vacuum should always be broken before securing the gland seal steam because __________.

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