Question 1 of 8
Intermediate

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

Question 2 of 8
Intermediate

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

Question 3 of 8
Intermediate

Why is it a good idea to make a well where the groundwater level is as high as possible?

Question 4 of 8
Intermediate

What can be done to the well if sand continues to enter a well after the well development has been carried out?

Question 5 of 8
Intermediate

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

Question 6 of 8
Intermediate

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

Question 7 of 8
Intermediate

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

Question 8 of 8
Intermediate

What could be the consequences of using an undersized pump in a well?

Question 8 of 8
Intermediate

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1: What kind of riser pipe is most likely to keep itself free from scaling?
Plastic hoses
1: What kind of riser pipe is most likely to keep itself free from scaling?
Stainless steel pipes
1: What kind of riser pipe is most likely to keep itself free from scaling?
Flex hoses
2: 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
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2: How does over- and under voltage, phase unbalance and phase loss impact the pump motor?
It raises the motor temperature, reducing the lifetime
2: 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 >
3: Why is it a good idea to make a well where the groundwater level is as high as possible?
The shorter the distance is to the water the less expensive it is to make the borehole and subsequently to pump the water to the surface
3: Why is it a good idea to make a well where the groundwater level is as high as possible?
The shorter the distance is from the surface to the ground water, the better the water quality is
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3: Why is it a good idea to make a well where the groundwater level is as high as possible?
A higher level means lower water temperatures and better motor cooling
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4: What can be done to the well if sand continues to enter a well after the well development has been carried out?
The well driller can try to run the pump at its maximum capacity in short periods of time over a couple of days
4: What can be done to the well if sand continues to enter a well after the well development has been carried out?
The well driller can replace the casing with a new one with smaller slots
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4: What can be done to the well if sand continues to enter a well after the well development has been carried out?
An additional filter can be installed inside the casing
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5: What is the most effective way to stay updated on your pump’s condition?
Manual inspection
5: What is the most effective way to stay updated on your pump’s condition?
Remote online monitoring
5: What is the most effective way to stay updated on your pump’s condition?
Regular maintenance
6: How is it possible to protect the motor against bad power supply?
By means of an electronic motor protection that senses all possible deviations
6: How is it possible to protect the motor against bad power supply?
By means of a UC filter
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6: How is it possible to protect the motor against bad power supply?
By using a special water resistant cabling
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7: What should the minimum flow past the motor be to ensure sufficient motor cooling?
0,5 m/s
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7: What should the minimum flow past the motor be to ensure sufficient motor cooling?
0,15 m/s
7: What should the minimum flow past the motor be to ensure sufficient motor cooling?
There are no specific requirements
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8: What could be the consequences of using an undersized pump in a well?
The pump will give too high pressure
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8: What could be the consequences of using an undersized pump in a well?
The risk of cavitation is very high
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8: What could be the consequences of using an undersized pump in a well?
The pump may not be able to deliver the required capacity