In which areas is there a bigger risk of pumping corrosive groundwater?
How does over- and under voltage, phase unbalance and phase loss impact the pump motor?
How is it possible to protect the motor against bad power supply?
Why is it a good idea to make a well where the groundwater level is as high as possible?
What should the minimum flow past the motor be to ensure sufficient motor cooling?
Why is it important to know the water drawdown?
What can be done to the well if sand continues to enter a well after the well development has been carried out?
What is the most effective way to stay updated on your pump’s condition?
Test results
Congratulations. You have passed the test and completed the 17 - Groundwater Pumping
Achieved badges:
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: 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: 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: 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 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: 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 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 is the most effective way to stay updated on your pump’s condition?
A: Manual inspection
Q: What is the most effective way to stay updated on your pump’s condition?
A: Remote online monitoring
Q: What is the most effective way to stay updated on your pump’s condition?
A: Regular maintenance