8 questions Basic

ECADEMY test

36 - Basic Principles and Pump Types

This course test contains 8 questions and can be retaken at any time.

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Question 3 of 8 Basic

Are axial flow impellers used in closed pump designs?

Question 4 of 8 Basic

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

Question 5 of 8 Basic

Can centrifugal pumps be connected directly to an asynchronous motor?

Question 6 of 8 Basic

In what year was the centrifugal pump invented?

Question 8 of 8 Basic

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

Question 8 of 8 Basic

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Correct
Q: What makes mixed flow impellers different from axial flow impellers?
A: They subject the fluid to a degree of radial flow
Correct
Q: What is a main disadvantage of a centrifugal pump?
A: They cannot create suction by themselves
Correct
Q: Are axial flow impellers used in closed pump designs?
A: No
Correct
Q: What kind of pumps would normally NOT have a radial flow impeller?
A: Sewage treatment pumps
Correct
Q: Can centrifugal pumps be connected directly to an asynchronous motor?
A: Yes
Correct
Q: In what year was the centrifugal pump invented?
A: 1689
Correct
Q: Centrifugal pumps can be categorised into the following groups…
A: Radial flow, mixed flow, axial flow
Correct
Q: How much of the world’s total volume of water is fresh water?
A: 3.5%