If a centrifugal main feed pump were...

Question 1 / 205eccef9cbacbc34ba4d457cf

Question 1 of 205eccef9cbacbc34ba4d457cf

If a centrifugal main feed pump were operated at shutoff head with the recirculating line closed, which of the following conditions could occur?

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Question 1 of 20

5eccef9cbacbc34ba4d457cf

If a centrifugal main feed pump were operated at shutoff head with the recirculating line closed, which of the following conditions could occur?

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🔍 Key Concepts

• Centrifugal pump shutoff head and what happens to flow, temperature, and pressure when discharge is blocked and recirc is closed • How heat from the pump (friction/impeller work) affects the water at low or zero flow, especially at the suction side • The role of the recirculating/bypass line in protecting the pump and system components at low flow

💭 Think About

• When a centrifugal feed pump runs with no flow, where does the energy it imparts to the fluid go, and what happens to the fluid temperature in the pump casing? • If water in the pump casing is heated while suction pressure is limited, what could happen to the water at the eye of the impeller (think about boiling/phase change)? • Which of the listed options directly relates to damage or problems inside the pump itself versus elsewhere in the feed system (drum, regulator, DC heater)?

✅ Before You Answer

• Verify which option describes a condition inside or immediately at the pump rather than in remote system components like the steam drum or DC heater • Consider which effect is most immediate when operating at shutoff head with no recirculation, before level changes elsewhere would have time to occur • Check your understanding of the term “flashing” and where it is most likely to occur in a centrifugal pump running hot with low suction pressure

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Question 1 of 20

If a centrifugal main feed pump were operated at shutoff head with the recirculating line closed, which of the following conditions could occur?

Flashing at the suction side of the pump.

An increased water level in the steam drum.

Excessive diaphragm seal wear in the feedwater regulator.

A decreased water level in the DC heater.

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Question 1 / 205eccef9cbacbc34ba4d457cf

Question 1 of 205eccef9cbacbc34ba4d457cf

If a centrifugal main feed pump were operated at shutoff head with the recirculating line closed, which of the following conditions could occur?

Back

Question 1 of 20

5eccef9cbacbc34ba4d457cf

If a centrifugal main feed pump were operated at shutoff head with the recirculating line closed, which of the following conditions could occur?

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