Question 1 of 8
Intermediate

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

Question 2 of 8
Intermediate

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

Question 3 of 8
Intermediate

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

Question 4 of 8
Intermediate

Why is it important to know the water drawdown?

Question 5 of 8
Intermediate

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

Question 6 of 8
Intermediate

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

Question 7 of 8
Intermediate

What is well development?

Question 8 of 8
Intermediate

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

Question 8 of 8
Intermediate

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1: 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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1: How does over- and under voltage, phase unbalance and phase loss impact the pump motor?
It raises the motor temperature, reducing the lifetime
1: How does over- and under voltage, phase unbalance and phase loss impact the pump motor?
It reduces flow and pressure
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2: In which areas is there a bigger risk of pumping corrosive groundwater?
In forests with old trees
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2: In which areas is there a bigger risk of pumping corrosive groundwater?
In coastal areas
2: In which areas is there a bigger risk of pumping corrosive groundwater?
In elevations above 1000 m
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3: On top of energy-efficient pump operation, how does a frequency drive benefit your installation?
It comes with a built-in motor protection
3: On top of energy-efficient pump operation, how does a frequency drive benefit your installation?
It can reduce cavitation
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3: On top of energy-efficient pump operation, how does a frequency drive benefit your installation?
It cools the motor
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4: 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
4: Why is it important to know the water drawdown?
Increased drawdown leads to poor water quality
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4: 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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5: What could be the consequences of using an undersized pump in a well?
The pump will give too high pressure
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5: What could be the consequences of using an undersized pump in a well?
The risk of cavitation is very high
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5: What could be the consequences of using an undersized pump in a well?
The pump may not be able to deliver the required capacity
6: 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
6: 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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6: 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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7: What is well development?
The drilling of a hole in the ground to find groundwater
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7: What is well development?
The installation of the well casing in the centre of the borehole
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7: 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
8: What kind of riser pipe is most likely to keep itself free from scaling?
Plastic hoses
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8: What kind of riser pipe is most likely to keep itself free from scaling?
Stainless steel pipes
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8: What kind of riser pipe is most likely to keep itself free from scaling?
Flex hoses