Question 1 of 8
Intermediate

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

Question 2 of 8
Intermediate

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

Question 3 of 8
Intermediate

Why is it important to know the water drawdown?

Question 4 of 8
Intermediate

What is well development?

Question 5 of 8
Intermediate

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

Question 6 of 8
Intermediate

What may cause friction loss in the pipes?

Question 7 of 8
Intermediate

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

Question 8 of 8
Intermediate

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

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: What kind of riser pipe is most likely to keep itself free from scaling?
Plastic hoses
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2: What kind of riser pipe is most likely to keep itself free from scaling?
Stainless steel pipes
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2: What kind of riser pipe is most likely to keep itself free from scaling?
Flex hoses
3: 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
3: Why is it important to know the water drawdown?
Increased drawdown leads to poor water quality
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3: 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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4: What is well development?
The drilling of a hole in the ground to find groundwater
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4: What is well development?
The installation of the well casing in the centre of the borehole
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4: 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
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: What may cause friction loss in the pipes?
Scaling
6: What may cause friction loss in the pipes?
Poor water quality
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6: What may cause friction loss in the pipes?
High water temperature
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7: How is it possible to protect the motor against bad power supply?
By means of an electronic motor protection that senses all possible deviations
7: How is it possible to protect the motor against bad power supply?
By means of a UC filter
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7: How is it possible to protect the motor against bad power supply?
By using a special water resistant cabling
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8: 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
8: 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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8: 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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