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

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

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

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

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A VFD provides soft start and soft stop that helps:

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Which of the following statements is correct?

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1: 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.
1: 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.
1: 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.
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
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2: A VFD is a device used to change the frequency of the alternating:
Efficiency
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3: 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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3: Which of the following statements depict the actual benefit of a VFD.
It is used to avoid cavitation.
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3: 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.
4: Which of the following pump performance regulation approaches does not allow for manual nor automatic flow/pressure adjustments?
Throttle control
4: Which of the following pump performance regulation approaches does not allow for manual nor automatic flow/pressure adjustments?
Modifying impeller diameter
4: Which of the following pump performance regulation approaches does not allow for manual nor automatic flow/pressure adjustments?
Speed control
5: A VFD provides soft start and soft stop that helps:
Reduce water consumption.
5: A VFD provides soft start and soft stop that helps:
Eliminate risk of water hammer.
5: A VFD provides soft start and soft stop that helps:
Save up to 20% energy.
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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