Question 1 of 8
Intermediate

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

Question 2 of 8
Intermediate

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

Question 3 of 8
Intermediate

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

Question 4 of 8
Intermediate

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

Question 5 of 8
Intermediate

What is well development?

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

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

Question 8 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 8 of 8
Intermediate

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1: 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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1: 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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1: 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
2: How is it possible to protect the motor against bad power supply?
By means of an electronic motor protection that senses all possible deviations
2: How is it possible to protect the motor against bad power supply?
By means of a UC filter
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2: How is it possible to protect the motor against bad power supply?
By using a special water resistant cabling
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3: What kind of riser pipe is most likely to keep itself free from scaling?
Plastic hoses
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3: What kind of riser pipe is most likely to keep itself free from scaling?
Stainless steel pipes
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3: What kind of riser pipe is most likely to keep itself free from scaling?
Flex hoses
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: What is well development?
The drilling of a hole in the ground to find groundwater
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5: What is well development?
The installation of the well casing in the centre of the borehole
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5: 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
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: On top of energy-efficient pump operation, how does a frequency drive benefit your installation?
It comes with a built-in motor protection
7: On top of energy-efficient pump operation, how does a frequency drive benefit your installation?
It can reduce cavitation
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7: On top of energy-efficient pump operation, how does a frequency drive benefit your installation?
It cools the motor
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8: 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
8: 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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8: 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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