Question 1 of 8
Intermediate

What may cause friction loss in the pipes?

Question 2 of 8
Intermediate

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

Question 3 of 8
Intermediate

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

Question 4 of 8
Intermediate

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

Question 5 of 8
Intermediate

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

Question 6 of 8
Intermediate

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

Question 7 of 8
Intermediate

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

Question 8 of 8
Intermediate

What is well development?

Question 8 of 8
Intermediate

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1: What may cause friction loss in the pipes?
Scaling
1: What may cause friction loss in the pipes?
Poor water quality
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1: What may cause friction loss in the pipes?
High water temperature
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2: 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
2: 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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2: 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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3: How is it possible to protect the motor against bad power supply?
By means of an electronic motor protection that senses all possible deviations
3: How is it possible to protect the motor against bad power supply?
By means of a UC filter
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3: How is it possible to protect the motor against bad power supply?
By using a special water resistant cabling
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4: 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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4: How does over- and under voltage, phase unbalance and phase loss impact the pump motor?
It raises the motor temperature, reducing the lifetime
4: How does over- and under voltage, phase unbalance and phase loss impact the pump motor?
It reduces flow and pressure
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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: 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
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6: 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
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6: 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
7: In which areas is there a bigger risk of pumping corrosive groundwater?
In forests with old trees
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7: In which areas is there a bigger risk of pumping corrosive groundwater?
In coastal areas
7: In which areas is there a bigger risk of pumping corrosive groundwater?
In elevations above 1000 m
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8: What is well development?
The drilling of a hole in the ground to find groundwater
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8: What is well development?
The installation of the well casing in the centre of the borehole
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8: 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