What is well development?
What can be done to the well if sand continues to enter a well after the well development has been carried out?
What should the minimum flow past the motor be to ensure sufficient motor cooling?
How is it possible to protect the motor against bad power supply?
What could be the consequences of using an undersized pump in a well?
In which areas is there a bigger risk of pumping corrosive groundwater?
Why is it important to know the water drawdown?
What kind of riser pipe is most likely to keep itself free from scaling?
Test results
Congratulations. You have passed the test and completed the 17 - Groundwater Pumping
Achieved badges:
Q: What is well development?
A: The drilling of a hole in the ground to find groundwater
Q: What is well development?
A: The installation of the well casing in the centre of the borehole
Q: What is well development?
A: A process that ensures that the well’s sand filter has been improved so the well produces clean, sand-free water
Q: What can be done to the well if sand continues to enter a well after the well development has been carried out?
A: The well driller can try to run the pump at its maximum capacity in short periods of time over a couple of days
Q: What can be done to the well if sand continues to enter a well after the well development has been carried out?
A: The well driller can replace the casing with a new one with smaller slots
Q: What can be done to the well if sand continues to enter a well after the well development has been carried out?
A: An additional filter can be installed inside the casing
Q: What should the minimum flow past the motor be to ensure sufficient motor cooling?
A: 0,5 m/s
Q: What should the minimum flow past the motor be to ensure sufficient motor cooling?
A: 0,15 m/s
Q: What should the minimum flow past the motor be to ensure sufficient motor cooling?
A: There are no specific requirements
Q: How is it possible to protect the motor against bad power supply?
A: By means of an electronic motor protection that senses all possible deviations
Q: How is it possible to protect the motor against bad power supply?
A: By means of a UC filter
Q: How is it possible to protect the motor against bad power supply?
A: By using a special water resistant cabling
Q: What could be the consequences of using an undersized pump in a well?
A: The pump will give too high pressure
Q: What could be the consequences of using an undersized pump in a well?
A: The risk of cavitation is very high
Q: What could be the consequences of using an undersized pump in a well?
A: The pump may not be able to deliver the required capacity
Q: In which areas is there a bigger risk of pumping corrosive groundwater?
A: In forests with old trees
Q: In which areas is there a bigger risk of pumping corrosive groundwater?
A: In coastal areas
Q: In which areas is there a bigger risk of pumping corrosive groundwater?
A: In elevations above 1000 m
Q: Why is it important to know the water drawdown?
A: The more the drawdown increases during pump operation, the more pressure is required to lift the groundwater to the surface
Q: Why is it important to know the water drawdown?
A: Increased drawdown leads to poor water quality
Q: Why is it important to know the water drawdown?
A: Steel casings may not be used if the drawdown is too big
Q: What kind of riser pipe is most likely to keep itself free from scaling?
A: Plastic hoses
Q: What kind of riser pipe is most likely to keep itself free from scaling?
A: Stainless steel pipes
Q: What kind of riser pipe is most likely to keep itself free from scaling?
A: Flex hoses