You start a centrifugal cargo pump to...

Question 1 / 2707066636ee728f7522a1c518a35

Question 1 of 2707066636ee728f7522a1c518a35

You start a centrifugal cargo pump to discharge cargo. The pump works fine for a while and then loses suction. What could have caused this?

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Question 1 of 27070

You start a centrifugal cargo pump to discharge cargo. The pump works fine for a while and then loses suction. What could have caused this?

🔍 Key Concepts

• Centrifugal pump suction conditions and what happens when suction is restricted or lost • Difference between a pump problem that happens immediately vs. one that appears after running normally for a while • How priming and NPSH (Net Positive Suction Head) affect centrifugal pump operation

💭 Think About

• Which of these options would usually cause trouble right when you start the pump, rather than after it has already been pumping correctly for some time? • If the pump is moving liquid at first, what might slowly change in the suction line or pump casing that would eventually cause loss of suction? • Think about what condition is required to keep a centrifugal pump full of liquid, and what could gradually reduce the amount of liquid at the eye of the impeller.

✅ Before You Answer

• Check which choices relate to starting characteristics (what happens at startup) versus operating characteristics over time • Verify your understanding of how priming works: does incomplete priming usually let a pump run well for a while and then fail, or does it cause problems from the beginning? • Consider whether discharge head being too high or suction-side pressure would more likely prevent adequate flow or cause the pump to lose suction after some operation.

Question 1 of 27070

You start a centrifugal cargo pump to discharge cargo. The pump works fine for a while and then loses suction. What could have caused this?

the pump running backwards

incomplete priming

the discharge head being too high

head pressure on the suction side of the pump

Question 1 / 2707066636ee728f7522a1c518a35

Question 1 of 2707066636ee728f7522a1c518a35

You start a centrifugal cargo pump to discharge cargo. The pump works fine for a while and then loses suction. What could have caused this?

Back

Question 1 of 27070

You start a centrifugal cargo pump to discharge cargo. The pump works fine for a while and then loses suction. What could have caused this?