If the flow of water from a centrifugal pump...

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Question 1 of 205eccef9bbacbc34ba4d454e0

If the flow of water from a centrifugal pump is allowed to be stopped by closing the discharge valve while the pump continues to run for an extended period, which of the following will occur?

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5eccef9bbacbc34ba4d454e0

If the flow of water from a centrifugal pump is allowed to be stopped by closing the discharge valve while the pump continues to run for an extended period, which of the following will occur?

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🔍 Key Concepts

• Centrifugal pump characteristics at shutoff (discharge valve closed) • What happens to flow, pressure, and temperature when liquid is trapped and impeller keeps spinning • Difference between shut-off head (maximum pressure) and normal operating pressure

💭 Think About

• When you close the discharge valve, what happens to the flow rate through the pump, and how does that affect friction and heat inside the casing? • Is the pump able to build pressure indefinitely past its design curve, or is there a limit to pressure at zero flow? • If liquid is not moving but the impeller is, what happens to the energy the impeller is adding into the liquid over time?

✅ Before You Answer

• Identify what shut-off head means on a centrifugal pump performance curve. • Consider whether wearing rings are most affected by short-term operation at no flow or by long-term erosion and cavitation under flow. • Think about whether trapped liquid with no circulation will change temperature and what the result of continued energy input would be.

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Study

Question 1 of 205eccef9bbacbc34ba4d454e0

If the flow of water from a centrifugal pump is allowed to be stopped by closing the discharge valve while the pump continues to run for an extended period, which of the following will occur?

Back

Question 1 of 20

5eccef9bbacbc34ba4d454e0

If the flow of water from a centrifugal pump is allowed to be stopped by closing the discharge valve while the pump continues to run for an extended period, which of the following will 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

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