1
Can centrifugal pumps be connected directly to an asynchronous motor?
2
What is a main disadvantage of a centrifugal pump?
4
What does ‘NPSH’ stand for in the NPSH-curve?
5
At the very highest level, what are the two main types of pump?
6
What makes mixed flow impellers different from axial flow impellers?
7
Centrifugal pumps can be categorised into the following groups…
Test results
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Q: Can centrifugal pumps be connected directly to an asynchronous motor?
A: Yes
Q: Can centrifugal pumps be connected directly to an asynchronous motor?
A: No
Q: Can centrifugal pumps be connected directly to an asynchronous motor?
A: Only in the case of immersible pumps
Q: What is a main disadvantage of a centrifugal pump?
A: They require a lot of maintenance
Q: What is a main disadvantage of a centrifugal pump?
A: They contain a lot of moving parts
Q: What is a main disadvantage of a centrifugal pump?
A: They cannot create suction by themselves
Q: How much of the world’s total volume of water is fresh water?
A: 72%
Q: How much of the world’s total volume of water is fresh water?
A: About 50%
Q: How much of the world’s total volume of water is fresh water?
A: 3.5%
Q: What does ‘NPSH’ stand for in the NPSH-curve?
A: Net potential surface heat
Q: What does ‘NPSH’ stand for in the NPSH-curve?
A: Net peripheral suction height
Q: What does ‘NPSH’ stand for in the NPSH-curve?
A: Net positive suction head
Q: At the very highest level, what are the two main types of pump?
A: Vertical pumps and horizontal pumps
Q: At the very highest level, what are the two main types of pump?
A: Positive displacement pumps and centrifugal pumps
Q: At the very highest level, what are the two main types of pump?
A: Submersible and sanitary pumps
Q: What makes mixed flow impellers different from axial flow impellers?
A: Mixed flow impellers deliver higher rotation speeds
Q: What makes mixed flow impellers different from axial flow impellers?
A: They subject the fluid to a degree of radial flow
Q: What makes mixed flow impellers different from axial flow impellers?
A: They’re not nearly as good as a fully axial flow impeller
Q: Centrifugal pumps can be categorised into the following groups…
A: Forward flow, backward flow, static flow
Q: Centrifugal pumps can be categorised into the following groups…
A: Vertical flow, horizontal flow, diagonal flow
Q: Centrifugal pumps can be categorised into the following groups…
A: Radial flow, mixed flow, axial flow
Q: In what year was the centrifugal pump invented?
A: 1689
Q: In what year was the centrifugal pump invented?
A: 1789
Q: In what year was the centrifugal pump invented?
A: 1923