1
A VFD is a device used to change the frequency of the alternating:
2
A VFD provides soft start and soft stop that helps:
3
To achieve high irrigation efficiency in all types of irrigation, it is important to be able to control the:
4
Which of the following pump performance regulation approaches does not allow for manual nor automatic flow/pressure adjustments?
5
Which of the following statements is correct?
6
Which of the following statements depict the actual benefit of a VFD.
Test results
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Achieved badges:
01.
Q: A VFD is a device used to change the frequency of the alternating:
A: Current
01.
Q: A VFD is a device used to change the frequency of the alternating:
A: Energy
01.
Q: A VFD is a device used to change the frequency of the alternating:
A: Efficiency
02.
Q: A VFD provides soft start and soft stop that helps:
A: Reduce water consumption.
02.
Q: A VFD provides soft start and soft stop that helps:
A: Eliminate risk of water hammer.
02.
Q: A VFD provides soft start and soft stop that helps:
A: Save up to 20% energy.
03.
Q: To achieve high irrigation efficiency in all types of irrigation, it is important to be able to control the:
A: Energy and pressure
03.
Q: To achieve high irrigation efficiency in all types of irrigation, it is important to be able to control the:
A: Flow and energy
03.
Q: To achieve high irrigation efficiency in all types of irrigation, it is important to be able to control the:
A: Flow and pressure
04.
Q: Which of the following pump performance regulation approaches does not allow for manual nor automatic flow/pressure adjustments?
A: Throttle control
04.
Q: Which of the following pump performance regulation approaches does not allow for manual nor automatic flow/pressure adjustments?
A: Modifying impeller diameter
04.
Q: Which of the following pump performance regulation approaches does not allow for manual nor automatic flow/pressure adjustments?
A: Speed control
05.
Q: Which of the following statements is correct?
A: A VFD is typically used when there is more than one irrigation zone, and every zone has different water requirements.
05.
Q: Which of the following statements is correct?
A: Installing a VFD with the main pivot typically saves 50% of the energy.
05.
Q: Which of the following statements is correct?
A: Integration of monitoring controls and variable speed is not helpful if the farmer wants to remotely manage irrigation.
06.
Q: Which of the following statements depict the actual benefit of a VFD.
A: It converts input frequency of 50 Hz or 60 Hz to an output frequency that is twice the input frequency.
06.
Q: Which of the following statements depict the actual benefit of a VFD.
A: It is used to avoid cavitation.
06.
Q: Which of the following statements depict the actual benefit of a VFD.
A: It provides soft start and soft stop, thereby, minimising the risk of water hammer in the system.