8 questions Intermediate

ECADEMY test

17 - Groundwater Pumping

This course test contains 8 questions and can be retaken at any time.

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Question 2 of 8 Intermediate

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

Question 3 of 8 Intermediate

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

Question 6 of 8 Intermediate

6 What may cause friction loss in the pipes?

Question 7 of 8 Intermediate

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

Question 8 of 8 Intermediate

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

Question 8 of 8 Intermediate

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Correct
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
Correct
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
Correct
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
Correct
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
Correct
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
Correct
Q: What may cause friction loss in the pipes?
A: Scaling
Correct
Q: In which areas is there a bigger risk of pumping corrosive groundwater?
A: In coastal areas
Correct
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