What is a main disadvantage of a centrifugal pump?
At the very highest level, what are the two main types of pump?
Can centrifugal pumps be connected directly to an asynchronous motor?
What does QH curve show?
What does ‘NPSH’ stand for in the NPSH-curve?
Test results
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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: 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: Are axial flow impellers used in closed pump designs?
A: Yes
Q: Are axial flow impellers used in closed pump designs?
A: Sometimes
Q: Are axial flow impellers used in closed pump designs?
A: No
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 does QH curve show?
A: Flow at a given head
Q: What does QH curve show?
A: Head at a given flow
Q: What does QH curve show?
A: Overall efficiency
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
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: 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%