8 questions Basic

ECADEMY test

Basic Principles and Pump Types

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

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Question 1 of 8 Basic

1 What type of pump is a dosing pump?

Question 2 of 8 Basic

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

Question 4 of 8 Basic

4 What does ‘NPSH’ stand for in the NPSH-curve?

Question 5 of 8 Basic

5 Are axial flow impellers used in closed pump designs?

Question 7 of 8 Basic

7 In a pump curve, head, power consumption, efficiency and NPSH are shown as a function of…

Question 8 of 8 Basic

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Correct
Q: What type of pump is a dosing pump?
A: A membrane pump
Correct
Q: How much of the world’s total volume of water is fresh water?
A: 3.5%
Correct
Q: At the very highest level, what are the two main types of pump?
A: Positive displacement pumps and centrifugal pumps
Correct
Q: What does ‘NPSH’ stand for in the NPSH-curve?
A: Net positive suction head
Correct
Q: Are axial flow impellers used in closed pump designs?
A: No
Correct
Q: What makes semi-axial flow impellers different from axial flow impellers?
A: They subject the fluid to a degree of radial flow
Correct
Q: In a pump curve, head, power consumption, efficiency and NPSH are shown as a function of…
A: Flow
Correct
Q: What is a main disadvantage of a centrifugal pump?
A: They cannot create suction by themselves