By-pass control is an efficient way of performance regulating a pump but what is the downside of the process?
On top of energy-efficient pump operation, how does a frequency drive benefit your installation?
What should the minimum flow past the motor be to ensure sufficient motor cooling?
What kind of riser pipe is most likely to keep itself free from scaling?
How does over- and under voltage, phase unbalance and phase loss impact the pump motor?
What may cause friction loss in the pipes?
Why is it a good idea to make a well where the groundwater level is as high as possible?
Test results
Congratulations. You have passed the test and completed the 17 - Groundwater Pumping
Achieved badges:
Q: By-pass control is an efficient way of performance regulating a pump but what is the downside of the process?
A: The by-passed water is wasted and cannot be used again
Q: By-pass control is an efficient way of performance regulating a pump but what is the downside of the process?
A: The motor temperature rises and increases the risk of motor burn-out
Q: By-pass control is an efficient way of performance regulating a pump but what is the downside of the process?
A: Energy is wasted as the pump continues to run at full speed
Q: On top of energy-efficient pump operation, how does a frequency drive benefit your installation?
A: It comes with a built-in motor protection
Q: On top of energy-efficient pump operation, how does a frequency drive benefit your installation?
A: It can reduce cavitation
Q: On top of energy-efficient pump operation, how does a frequency drive benefit your installation?
A: It cools the motor
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: 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
Q: How does over- and under voltage, phase unbalance and phase loss impact the pump motor?
A: It increases speed and thereby the performance of the pump
Q: How does over- and under voltage, phase unbalance and phase loss impact the pump motor?
A: It raises the motor temperature, reducing the lifetime
Q: How does over- and under voltage, phase unbalance and phase loss impact the pump motor?
A: It reduces flow and pressure
Q: What may cause friction loss in the pipes?
A: Scaling
Q: What may cause friction loss in the pipes?
A: Poor water quality
Q: What may cause friction loss in the pipes?
A: High water temperature
Q: Why is it a good idea to make a well where the groundwater level is as high as possible?
A: 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
Q: Why is it a good idea to make a well where the groundwater level is as high as possible?
A: The shorter the distance is from the surface to the ground water, the better the water quality is
Q: Why is it a good idea to make a well where the groundwater level is as high as possible?
A: A higher level means lower water temperatures and better motor cooling
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