Question 1 of 8
Intermediate

In which areas is there a bigger risk of pumping corrosive groundwater?

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

What is well development?

Question 4 of 8
Intermediate

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

Question 5 of 8
Intermediate

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

Question 6 of 8
Intermediate

Why is it important to know the water drawdown?

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

Question 8 of 8
Intermediate

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1: In which areas is there a bigger risk of pumping corrosive groundwater?
In forests with old trees
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1: In which areas is there a bigger risk of pumping corrosive groundwater?
In coastal areas
1: In which areas is there a bigger risk of pumping corrosive groundwater?
In elevations above 1000 m
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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
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3: What is well development?
The drilling of a hole in the ground to find groundwater
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3: What is well development?
The installation of the well casing in the centre of the borehole
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3: What is well development?
A process that ensures that the well’s sand filter has been improved so the well produces clean, sand-free water
4: What should the minimum flow past the motor be to ensure sufficient motor cooling?
0,5 m/s
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4: What should the minimum flow past the motor be to ensure sufficient motor cooling?
0,15 m/s
4: What should the minimum flow past the motor be to ensure sufficient motor cooling?
There are no specific requirements
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5: On top of energy-efficient pump operation, how does a frequency drive benefit your installation?
It comes with a built-in motor protection
5: On top of energy-efficient pump operation, how does a frequency drive benefit your installation?
It can reduce cavitation
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5: On top of energy-efficient pump operation, how does a frequency drive benefit your installation?
It cools the motor
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6: 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
6: Why is it important to know the water drawdown?
Increased drawdown leads to poor water quality
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6: Why is it important to know the water drawdown?
Steel casings may not be used if the drawdown is too big
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7: What kind of riser pipe is most likely to keep itself free from scaling?
Plastic hoses
7: What kind of riser pipe is most likely to keep itself free from scaling?
Stainless steel pipes
7: What kind of riser pipe is most likely to keep itself free from scaling?
Flex hoses
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