When opening a ballast pump for inspection,...

Question 1 / 270705eccef9bbacbc34ba4d454fe

Question 1 of 270705eccef9bbacbc34ba4d454fe

When opening a ballast pump for inspection, the wear ring clearance is found to be approaching maximum. Which of the following would be expected?

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Question 1 of 27070

When opening a ballast pump for inspection, the wear ring clearance is found to be approaching maximum. Which of the following would be expected?

🔍 Key Concepts

• Effect of increased wear ring clearance on centrifugal pump efficiency • Relationship between internal recirculation/leakage and pump capacity/pressure • How pump condition affects vibration and lift (suction performance)

💭 Think About

• If more liquid can leak back through the enlarged clearance between impeller and casing, what happens to the useful flow going out the discharge? • How would increased internal leakage inside the pump affect the pressure the pump can develop at a given speed? • Would worn wear rings generally make the pump operate more smoothly, or less efficiently?

✅ Before You Answer

• Review the definition and function of a wear ring in a centrifugal pump (what does it seal between?) • Think about whether maximum clearance would improve or reduce volumetric efficiency • Check which options are consistent with a pump becoming less efficient due to internal recirculation

Question 1 of 27070

When opening a ballast pump for inspection, the wear ring clearance is found to be approaching maximum. Which of the following would be expected?

Pump capacity would be decreased.

Pump vibration would be decreased.

Pump discharge pressure would be increased.

Pump lift would be increased.

Question 1 / 270705eccef9bbacbc34ba4d454fe

Question 1 of 270705eccef9bbacbc34ba4d454fe

When opening a ballast pump for inspection, the wear ring clearance is found to be approaching maximum. Which of the following would be expected?

Back

Question 1 of 27070

When opening a ballast pump for inspection, the wear ring clearance is found to be approaching maximum. Which of the following would be expected?