Question 1 of 8
Basic

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

Question 2 of 8
Basic

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

Question 3 of 8
Basic

Can centrifugal pumps be connected directly to an asynchronous motor?

Question 4 of 8
Basic

Are axial flow impellers used in closed pump designs?

Question 5 of 8
Basic

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

Question 6 of 8
Basic

What does QH curve show?

Question 7 of 8
Basic

What is a main disadvantage of a centrifugal pump?

Question 8 of 8
Basic

In what year was the centrifugal pump invented?

Question 8 of 8
Basic

Happy with your answers?

Submit your current answers and get the final test result.

Test results

Congratulations. You have passed the test and completed the 36 - Basic Principles and Pump Types
Sorry. You did not pass the 36 - Basic Principles and Pump Types test this time
Achieved badges:
How would you rate this course?
1: What does ‘NPSH’ stand for in the NPSH-curve?
Net potential surface heat
You can find the answer here >
1: What does ‘NPSH’ stand for in the NPSH-curve?
Net peripheral suction height
You can find the answer here >
1: What does ‘NPSH’ stand for in the NPSH-curve?
Net positive suction head
2: How much of the world’s total volume of water is fresh water?
72%
You can find the answer here >
2: How much of the world’s total volume of water is fresh water?
About 50%
You can find the answer here >
2: How much of the world’s total volume of water is fresh water?
3.5%
3: Can centrifugal pumps be connected directly to an asynchronous motor?
Yes
3: Can centrifugal pumps be connected directly to an asynchronous motor?
No
You can find the answer here >
3: Can centrifugal pumps be connected directly to an asynchronous motor?
Only in the case of immersible pumps
You can find the answer here >
4: Are axial flow impellers used in closed pump designs?
Yes
You can find the answer here >
4: Are axial flow impellers used in closed pump designs?
Sometimes
You can find the answer here >
4: Are axial flow impellers used in closed pump designs?
No
5: At the very highest level, what are the two main types of pump?
Vertical pumps and horizontal pumps
You can find the answer here >
5: At the very highest level, what are the two main types of pump?
Positive displacement pumps and centrifugal pumps
5: At the very highest level, what are the two main types of pump?
Submersible and sanitary pumps
You can find the answer here >
6: What does QH curve show?
Flow at a given head
You can find the answer here >
6: What does QH curve show?
Head at a given flow
6: What does QH curve show?
Overall efficiency
You can find the answer here >
7: What is a main disadvantage of a centrifugal pump?
They require a lot of maintenance
You can find the answer here >
7: What is a main disadvantage of a centrifugal pump?
They contain a lot of moving parts
You can find the answer here >
7: What is a main disadvantage of a centrifugal pump?
They cannot create suction by themselves
8: In what year was the centrifugal pump invented?
1689
8: In what year was the centrifugal pump invented?
1789
You can find the answer here >
8: In what year was the centrifugal pump invented?
1923
You can find the answer here >