Question 1 of 8
Basic

How much of the world’s total volume of water is fresh water?

Question 2 of 8
Basic

At the very highest level, what are the two main types of pump?

Question 3 of 8
Basic

Centrifugal pumps can be categorised into the following groups…

Question 4 of 8
Basic

In what year was the centrifugal pump invented?

Question 5 of 8
Basic

What kind of pumps would normally NOT have a radial flow impeller?

Question 6 of 8
Basic

What does QH curve show?

Question 7 of 8
Basic

What makes mixed flow impellers different from axial flow impellers?

Question 8 of 8
Basic

What is a main disadvantage of a centrifugal pump?

Question 8 of 8
Basic

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1: How much of the world’s total volume of water is fresh water?
72%
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1: How much of the world’s total volume of water is fresh water?
About 50%
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1: How much of the world’s total volume of water is fresh water?
3.5%
2: At the very highest level, what are the two main types of pump?
Vertical pumps and horizontal pumps
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2: At the very highest level, what are the two main types of pump?
Positive displacement pumps and centrifugal pumps
2: At the very highest level, what are the two main types of pump?
Submersible and sanitary pumps
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3: Centrifugal pumps can be categorised into the following groups…
Forward flow, backward flow, static flow
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3: Centrifugal pumps can be categorised into the following groups…
Vertical flow, horizontal flow, diagonal flow
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3: Centrifugal pumps can be categorised into the following groups…
Radial flow, mixed flow, axial flow
4: In what year was the centrifugal pump invented?
1689
4: In what year was the centrifugal pump invented?
1789
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4: In what year was the centrifugal pump invented?
1923
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5: What kind of pumps would normally NOT have a radial flow impeller?
Circulating pumps
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5: What kind of pumps would normally NOT have a radial flow impeller?
Immersible pumps
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5: What kind of pumps would normally NOT have a radial flow impeller?
Sewage treatment pumps
6: What does QH curve show?
Flow at a given head
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6: What does QH curve show?
Head at a given flow
6: What does QH curve show?
Overall efficiency
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7: What makes mixed flow impellers different from axial flow impellers?
Mixed flow impellers deliver higher rotation speeds
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7: What makes mixed flow impellers different from axial flow impellers?
They subject the fluid to a degree of radial flow
7: What makes mixed flow impellers different from axial flow impellers?
They’re not nearly as good as a fully axial flow impeller
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8: What is a main disadvantage of a centrifugal pump?
They require a lot of maintenance
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8: What is a main disadvantage of a centrifugal pump?
They contain a lot of moving parts
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8: What is a main disadvantage of a centrifugal pump?
They cannot create suction by themselves