Question 1 of 6
Intermediate

A VFD provides soft start and soft stop that helps:

Question 2 of 6
Intermediate

A VFD is a device used to change the frequency of the alternating:

Question 3 of 6
Intermediate

Which of the following pump performance regulation approaches does not allow for manual nor automatic flow/pressure adjustments?

Question 4 of 6
Intermediate

To achieve high irrigation efficiency in all types of irrigation, it is important to be able to control the:

Question 5 of 6
Intermediate

In which of the following circumstances should a VFD be used?

Question 6 of 6
Intermediate

When a VFD is installed with a pump, what happens if the valve for one irrigation zone is closed and other is open?

Question 6 of 6
Intermediate

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1: A VFD provides soft start and soft stop that helps:
Reduce water consumption.
1: A VFD provides soft start and soft stop that helps:
Eliminate risk of water hammer.
1: A VFD provides soft start and soft stop that helps:
Save up to 20% energy.
2: A VFD is a device used to change the frequency of the alternating:
Current
2: A VFD is a device used to change the frequency of the alternating:
Energy
You can find the answer here >
2: A VFD is a device used to change the frequency of the alternating:
Efficiency
You can find the answer here >
3: Which of the following pump performance regulation approaches does not allow for manual nor automatic flow/pressure adjustments?
Throttle control
3: Which of the following pump performance regulation approaches does not allow for manual nor automatic flow/pressure adjustments?
Modifying impeller diameter
3: Which of the following pump performance regulation approaches does not allow for manual nor automatic flow/pressure adjustments?
Speed control
4: To achieve high irrigation efficiency in all types of irrigation, it is important to be able to control the:
Energy and pressure
4: To achieve high irrigation efficiency in all types of irrigation, it is important to be able to control the:
Flow and energy
4: To achieve high irrigation efficiency in all types of irrigation, it is important to be able to control the:
Flow and pressure
5: In which of the following circumstances should a VFD be used?
If an irrigation system has unchanged flow and pressure requirements.
5: In which of the following circumstances should a VFD be used?
If an irrigation system has more than one zone.
5: In which of the following circumstances should a VFD be used?
Most common flood irrigation systems.
6: When a VFD is installed with a pump, what happens if the valve for one irrigation zone is closed and other is open?
A pressure sensor notifies the VFD to reduce the pressure, and thereby speed of the pump.
6: When a VFD is installed with a pump, what happens if the valve for one irrigation zone is closed and other is open?
The pressure decreases in the zone that is open.
6: When a VFD is installed with a pump, what happens if the valve for one irrigation zone is closed and other is open?
The power consumption increases by almost 50% compared with both zones open.