A centrifugal pump gradually develops...

Question 1 / 205eccef9bbacbc34ba4d454b4

Question 1 of 205eccef9bbacbc34ba4d454b4

A centrifugal pump gradually develops insufficient discharge pressure. What corrective action is required?

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Question 1 of 20

5eccef9bbacbc34ba4d454b4

A centrifugal pump gradually develops insufficient discharge pressure. What corrective action is required?

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🔍 Key Concepts

• Centrifugal pump performance – how flow, head (pressure), and power change when you restrict suction vs. discharge side • Causes of low discharge pressure – internal leakage between impeller and casing vs. suction problems like air, cavitation, or low NPSH (net positive suction head) • Lantern rings vs. wearing rings – what each component does in a pump and which one affects developed head/pressure

💭 Think About

• When a centrifugal pump slowly loses its ability to build pressure over time (not suddenly), what kind of wear or internal condition usually causes that? • What happens to pump capacity and discharge pressure if you start closing the suction valve compared to closing the discharge valve? Which action is generally avoided? • Which component in the list directly affects internal recirculation (slip) between high-pressure and low-pressure areas in the pump, and thus the discharge pressure?

✅ Before You Answer

• Confirm which parts of a centrifugal pump control internal clearances between the impeller and casing (affecting leakage and pressure). • Verify that throttling on the suction side is usually undesirable because it can reduce NPSH and promote cavitation. • Distinguish the function of lantern rings (sealing/flush water distribution) from wearing rings (controlling leakage and maintaining pump efficiency).

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Question 1 of 20

A centrifugal pump gradually develops insufficient discharge pressure. What corrective action is required?

Replace the lantern rings.

Replace the wearing rings.

Throttle in on the suction valve.

Throttle in on the discharge valve.

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Question 1 / 205eccef9bbacbc34ba4d454b4

Question 1 of 205eccef9bbacbc34ba4d454b4

A centrifugal pump gradually develops insufficient discharge pressure. What corrective action is required?

Back

Question 1 of 20

5eccef9bbacbc34ba4d454b4

A centrifugal pump gradually develops insufficient discharge pressure. What corrective action is required?

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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