模拟题1(国外英文资料).doc

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模拟题1(国外英文资料)

模拟题1(国外英文资料) 1, the reliability of power supply is generally assessed by (A). A. power supply reliability rate is B. months, power supply reliability rate is C. days, power supply reliability rate In order to analyze the load rate, the daily load rate is often used. 2, high voltage distribution network refers to voltage (C) and above distribution network. A., 1KV, B., 35KV, C., 110KV 3, the transformer (C) short-circuit, the primary winding voltage applied to the current to its rated value, the transformer from the power absorbed by the power known as short-circuit loss. A. primary winding, B. high voltage winding, C. two winding 4 、 the minimum voltage level of the line terminal is (B) in the power system of our country. A., 0.20kV, B., 0.38kV, C., 0.45kV 5, in the case of ignoring the internal loss of the transformer, the ratio of the one or two current of the transformer is inversely proportional to the ratio of (D). A. one or two side induction potential instantaneous value B. one or two side induction potential maximum C. one or two side voltage instantaneous value Number of turns of D. one or two winding 6 、 the voltage regulation mode of transformer is divided into (C). The A. has excitation voltage regulation and on load voltage regulation B. no excitation voltage regulation and no load voltage regulation C. no excitation voltage regulation and on load voltage regulation 7, if the internal loss of the transformer is ignored, the output power of the two winding of the transformer is equal to the primary winding (A). A. input power, B. loss, power C., reactive power 8 、 current transformer is divided into measuring current transformer and (C) according to its use. A. current transformer for charging Current transformer for B. insulation Current transformer for C. protection 9, rated capacity of double winding transformer (B) winding rated capacity. A. greater than B. equals C. less than 10, between the transformer winding and the iron core is (A). A. insulated

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