15春西交《电力系统电压及其防护》在线作业满分答案（15, spring West to power system voltage and its protection online homework, out of the answer）.docVIP

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15春西交《电力系统电压及其防护》在线作业满分答案（15, spring West to power system voltage and its protection online homework, out of the answer）.doc

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15春西交《电力系统电压及其防护》在线作业满分答案（15, spring West to power system voltage and its protection online homework, out of the answer） On the online operation of power system voltage and its protection in the west of 15 spring Total score: 100 test time: - Radio examination A multiple-choice question Radio examination questions (40 questions, 80 points) 1. () can be used for on-line monitoring of gas in transformer oil. A. sensor detection method B. hydrogen flame monitor method C. thermal conductivity detector detection method D. above is OK Full marks: 2 2., the flashover voltage is equal to the breakdown voltage of the pure air gap when the discharge distance is the same. A. below B. equals C. higher than D. less than equal to Full marks: 2 The full volt second characteristic of 3. GIS insulation is relatively flat, and the shock factor is (). A. 1.2-1.3 B. 1.3-1.4 C. 1.4-1.5 D. 1.5-1.6 Full marks: 2 4. the relative dielectric constant of all gas medium is taken. A. 0.8 B. 0.9 C. 1 D. 1 Full marks: 2 5., improving the field distribution can effectively (or) breakdown voltage of the gap. A. decrease B. increase C. invariant D. decreases first and then increases Full marks: 2 6. the ratio of the width of the umbrella skirt to the distance between the main stems. A. 1:3 B. 1:4 C. 1:2 D. 1:6 Full marks: 2 7. ionization is the process by which electrons escape from the nucleus and form free electrons and (). A. cation B. negative ion C. ion D. proton Full marks: 2 8. when the line is struck by lightning, traveling wave will move along the wire to the substation, its amplitude () the impact discharge voltage of the line. A. greater than B. is less than C. greater than or equal to D. less than equal to Full marks: 2 9., in order to test whether it can work reliably under long working voltage and transient overvoltage, the electrical equipment needs to be tested after the factory, installation, debugging or overhaul. A. high voltage test B. online test C. insulation test D. impedance