Excessive air leakage into the suction side...

Question 1 / 2707066636ef128f7522a1c522f2e

Question 1 of 2707066636ef128f7522a1c522f2e

Excessive air leakage into the suction side of a centrifugal pump would be indicated by which of the following operational problems?

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Question 1 of 27070

Excessive air leakage into the suction side of a centrifugal pump would be indicated by which of the following operational problems?

🔍 Key Concepts

• Centrifugal pump suction conditions and how air or vapor in the suction affects performance • Difference between cavitation/pounding and loss of prime/air binding • How flow rate and noise change when a centrifugal pump is drawing air instead of solid liquid

💭 Think About

• Think about what happens to a centrifugal pump’s ability to move liquid if a lot of air gets into the suction: does the pump move more liquid, less liquid, or the same? • Which of the listed symptoms would you expect if the pump became partly or fully air bound after running for a short time? • Which option describes a problem that starts after the pump has already been moving liquid normally for a while, then changes as air accumulates?

✅ Before You Answer

• Which choice directly involves a change in liquid flow rate over time rather than an immediate mechanical or electrical problem? • Which symptom is clearly tied to conditions at the suction side (liquid/air mixture, loss of prime) rather than packing friction or motor load? • Ask yourself: if air leaks in, will the pump load the motor more or less, and will it make loud cavitation noises at the suction chest or quietly lose effective pumping?

Question 1 of 27070

Excessive air leakage into the suction side of a centrifugal pump would be indicated by which of the following operational problems?

The pump packing gland overheats after short operating periods.

Pounding noises can be heard at the pump suction chest.

The pump delivers full capacity when started, but gradually slackens off to an abnormally low flow.

The motor overcurrent protective device continually shuts the pump down.

Question 1 / 2707066636ef128f7522a1c522f2e

Question 1 of 2707066636ef128f7522a1c522f2e

Excessive air leakage into the suction side of a centrifugal pump would be indicated by which of the following operational problems?

Back

Question 1 of 27070

Excessive air leakage into the suction side of a centrifugal pump would be indicated by which of the following operational problems?