《电工基础试题(一)（basic examination questions of electrical engineering ）》由会员分享，可在线阅读，更多相关《电工基础试题(一)（basic examination questions of electrical engineering ）（23页珍藏版）》请在金锄头文库上搜索。
1、电工基础试题(一)（Basic examination questions of Electrical Engineering (1)）The basic questions of electrician (a).Txt to stay up late, because the courage to end the day; stay in bed because of the courage to start the day. A friend is to see through you who still love you. The national electrical network
2、operation of low-voltage part electrician foundation knowledge theory of licensing exam review questionsSome bloggers and Internet users should be invited to collect electrical knowledge review questions, examination, test centers and other blog published for users to borrow, electrical upgrade prom
3、otion exam, exam candidates, job training and examination, recertification examination of evidence, electrical network theory test work permit peace learning reference.Basic knowledge of electrical electrician is the foundation of all types, this paper selected questions, is the electrician foundati
4、on knowledge test content, but also an important content of the primary and intermediate electrician job training, the promotion examination. Familiar with and master the basic knowledge of electrical, allows you to further explore the mysteries of electrician or deal with all kinds of examinations
5、with ease, ease, relaxed and happy to finish the work. (the answer is only for reference, welcome the friends looking for carp, which may be wrong)From (and family)A choiceThe basic unit of charge is 1. (C).A. second B. amp C. Coulomb D. kgIs equal to 2.1 amperes (B) a.A. 103 B. 106 C. 109 D. 1023.
6、a uniform wire stretched for 3 times the original length, while the resistance to the original (C times).A. 3 B. 1/3 C. 9 D. 1/9The 4. generation of series resonant condition (C).A. XL, Xc B. XL Xc C. XL D. = Xc XL = Xc E. XL = XcAt the end of the 5. voltage no-load long HV transmission lines (B) en
7、d voltage.A. below B. is higher than C. equal to D. less than or equal to6. power three-phase symmetrical load, which is between the phase angle (B).The A. line voltage and line current B. phase voltage and line currentThe C. line voltage and phase current and phase voltage phase current D.7. when t
8、he power frequency increases, respectively with R, L bulb series, C3 circuit in parallel, and (B) increase the brightness of the bulb series.A. R B. L C. C D. R and L E. R and C8. of the rated voltage is 220V the light bulb in the 110V power supply, lighting power is the original (B).A. 2 B. 4 C. 1/
9、2 D. 1/49. the rated voltage of the same two resistors are connected in series in the circuit, the resistance of heat resistance (B).The same A. B. large C. small10. by using the principle of superposition calculation of complex circuit is a complex circuit to calculate circuit (A).A.Single supply B
10、. R, L D. C. large smallThe 11. circuit is composed of power supply, load, line (B).A. B. C. generator D. instrument transformer switch12. current is formed by the directional movement of electrons, accustomed to (D) directional movement direction as the direction of the current.A. B. C. N-S left ha
11、nd rule D. positive charge E. negative charge13, the current size of the current intensity to represent its value is equal to the per unit time through the conductor cross section (B) and algebra.A. B. electric current (charge) the strength of the current D. power C.The resistance of the 14. conduct
12、or, and the conductor section length not only relevant, but also with the conductor (D) on.A. B. C. D. material temperature humidity rangeThe three elements of 15. alternating current is the maximum frequency (C).A. B. C. D. the initial phase angle of phase voltage16. sinusoidal alternating current
13、effective value such as maximum value (D).A.1/3 B. 1/2 C. 2 D. 0.717. resistance resistance does not change with the applied voltage or current size of the call (C).A. B. fixed resistor variable resistor C. linear resistor D. nonlinear resistorResistance of 18. resistance change with the applied vol
14、tage or current size of the call (D).A. B. fixed resistor variable resistor C. linear resistor D. nonlinear resistor19. two parallel wires by currents in the same direction, between the conductor (D).A. B. C. eddy current magnetic field generated rejection D. attractThe 20. conductor in the current,
15、 more close to the conductor surface, (A), this phenomenon is called the skin effect.The greater the B. A. current voltage higher C. higher temperature resistance is D.21. power three-phase star connection or load line voltage is the voltage (A) times, line current and phase current. A. 3 B. 2 C. 1 v v D. 222. magnetic induction current generated by the (C) always try to change original flux.The influence of A. B. enhanced C. D. to prevent decay23. in the three-phase four wire system, when the three-phase unbalanced load, three-phase voltage equal, neutral current (B).A. B. is not
