Environmental Protection Daily Quiz 12.22: Participate for prizes; 3 answers correct and you’ll get another 3 prizes
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This post was last edited by slll611 on 2015-12-24 21:45. Multiple-choice question: In frequency conversion energy-saving technology, frequency conversion refers to: (B). A. Change the frequency at which the transformer starts up. B. Change the frequency of the power supply to the transformer. C. Change the voltage level of the transformer. D. Change the current level of the transformer
B. Change the frequency of the power supply to the electrical appliance
In variable-frequency energy-saving technology, variable frequency refers to changing the magnitude of the current in electrical appliances
In variable-frequency energy-saving technology, variable frequency refers to: (B). A. Change the frequency at which the transformer starts up. B. Change the frequency of the power supply to the transformer. C. Change the voltage level of the transformer. D. Change the current level of the transformer
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B. Change the frequency of the power supply to the electrical appliance
In variable-frequency energy-saving technology, variable frequency refers to (A)
B. Change the frequency of the power supply to the electrical appliance
In variable-frequency energy-saving technology, variable frequency refers to: (B)