Question 1 of 8
Intermediate

On top of energy-efficient pump operation, how does a frequency drive benefit your installation?

Question 2 of 8
Intermediate

Why is it important to know the water drawdown?

Question 3 of 8
Intermediate

What should the minimum flow past the motor be to ensure sufficient motor cooling?

Question 4 of 8
Intermediate

By-pass control is an efficient way of performance regulating a pump but what is the downside of the process?

Question 5 of 8
Intermediate

How is it possible to protect the motor against bad power supply?

Question 6 of 8
Intermediate

How does over- and under voltage, phase unbalance and phase loss impact the pump motor?

Question 7 of 8
Intermediate

What kind of riser pipe is most likely to keep itself free from scaling?

Question 8 of 8
Intermediate

What is the most effective way to stay updated on your pump’s condition?

Question 8 of 8
Intermediate

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 17 - Groundwater Pumping
Sorry. You did not pass the 17 - Groundwater Pumping test this time
Achieved badges:
How would you rate this course?
1: On top of energy-efficient pump operation, how does a frequency drive benefit your installation?
It comes with a built-in motor protection
1: On top of energy-efficient pump operation, how does a frequency drive benefit your installation?
It can reduce cavitation
You can find the answer here >
1: On top of energy-efficient pump operation, how does a frequency drive benefit your installation?
It cools the motor
You can find the answer here >
2: Why is it important to know the water drawdown?
The more the drawdown increases during pump operation, the more pressure is required to lift the groundwater to the surface
2: Why is it important to know the water drawdown?
Increased drawdown leads to poor water quality
You can find the answer here >
2: Why is it important to know the water drawdown?
Steel casings may not be used if the drawdown is too big
You can find the answer here >
3: What should the minimum flow past the motor be to ensure sufficient motor cooling?
0,5 m/s
You can find the answer here >
3: What should the minimum flow past the motor be to ensure sufficient motor cooling?
0,15 m/s
3: What should the minimum flow past the motor be to ensure sufficient motor cooling?
There are no specific requirements
You can find the answer here >
4: By-pass control is an efficient way of performance regulating a pump but what is the downside of the process?
The by-passed water is wasted and cannot be used again
You can find the answer here >
4: By-pass control is an efficient way of performance regulating a pump but what is the downside of the process?
The motor temperature rises and increases the risk of motor burn-out
You can find the answer here >
4: By-pass control is an efficient way of performance regulating a pump but what is the downside of the process?
Energy is wasted as the pump continues to run at full speed
5: How is it possible to protect the motor against bad power supply?
By means of an electronic motor protection that senses all possible deviations
5: How is it possible to protect the motor against bad power supply?
By means of a UC filter
You can find the answer here >
5: How is it possible to protect the motor against bad power supply?
By using a special water resistant cabling
You can find the answer here >
6: How does over- and under voltage, phase unbalance and phase loss impact the pump motor?
It increases speed and thereby the performance of the pump
You can find the answer here >
6: How does over- and under voltage, phase unbalance and phase loss impact the pump motor?
It raises the motor temperature, reducing the lifetime
6: How does over- and under voltage, phase unbalance and phase loss impact the pump motor?
It reduces flow and pressure
You can find the answer here >
7: What kind of riser pipe is most likely to keep itself free from scaling?
Plastic hoses
You can find the answer here >
7: What kind of riser pipe is most likely to keep itself free from scaling?
Stainless steel pipes
You can find the answer here >
7: What kind of riser pipe is most likely to keep itself free from scaling?
Flex hoses
8: What is the most effective way to stay updated on your pump’s condition?
Manual inspection
You can find the answer here >
8: What is the most effective way to stay updated on your pump’s condition?
Remote online monitoring
8: What is the most effective way to stay updated on your pump’s condition?
Regular maintenance
You can find the answer here >