Question 1 of 6
Intermediate

Which of the following statements depict the actual benefit of a VFD.

Question 2 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 3 of 6
Intermediate

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

Question 4 of 6
Intermediate

A VFD provides soft start and soft stop that helps:

Question 5 of 6
Intermediate

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

Question 6 of 6
Intermediate

Which of the following statements is correct?

Question 6 of 6
Intermediate

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1: Which of the following statements depict the actual benefit of a VFD.
It converts input frequency of 50 Hz or 60 Hz to an output frequency that is twice the input frequency.
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1: Which of the following statements depict the actual benefit of a VFD.
It is used to avoid cavitation.
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1: Which of the following statements depict the actual benefit of a VFD.
It provides soft start and soft stop, thereby, minimising the risk of water hammer in the system.
2: 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.
2: 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.
2: 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.
3: To achieve high irrigation efficiency in all types of irrigation, it is important to be able to control the:
Energy and pressure
3: To achieve high irrigation efficiency in all types of irrigation, it is important to be able to control the:
Flow and energy
3: To achieve high irrigation efficiency in all types of irrigation, it is important to be able to control the:
Flow and pressure
4: A VFD provides soft start and soft stop that helps:
Reduce water consumption.
4: A VFD provides soft start and soft stop that helps:
Eliminate risk of water hammer.
4: A VFD provides soft start and soft stop that helps:
Save up to 20% energy.
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: Which of the following statements is correct?
A VFD is typically used when there is more than one irrigation zone, and every zone has different water requirements.
6: Which of the following statements is correct?
Installing a VFD with the main pivot typically saves 50% of the energy.
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6: Which of the following statements is correct?
Integration of monitoring controls and variable speed is not helpful if the farmer wants to remotely manage irrigation.
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