Source of the question bank: Safety production simulation exam one-point public number mini program
The 2022 High Voltage Electrician Retraining Question Bank is a variety of practice modes of the High Voltage Electrician National Question Bank! The 2022 High Voltage Electrician Special Work Certificate Exam Question Bank and Mock Exam are compiled according to the latest textbooks for high voltage electricians. The high-voltage electrician exam question bank passes the safety production simulation exam and practices the wrong questions.
1. [Single choice question] The following () indicates the current relay. （ C ）
A、KT
B、KS
C-KA
2. [Single choice question] For direct contact with electric shock accident protection, a general type residual current protector should be selected, and its rated residual action current does not exceed (). （ A ）
A、30mA
B、20mA
C、10mA
3. [Single choice] The isolator switch can be pulled and closed to no-load transformers with a capacity of 35kV () and below. （ A ）
A、1000kVA
B、800kVA
C、3150kVA
4. [Single choice] () refers to those appliances whose insulation strength can withstand the working voltage of the equipment for a long time, and can ensure the safety of the staff when the voltage level generates an internal overvoltage. （ B ）
A. Insulation safety appliances
B. Basic safety appliances
C. General protective safety appliances
5. [Single choice question] () is used for the connection and repair of wires and lightning protection lines. （ C ）
A, support brackets
B. Connecting fittings
C. Continue the fittings
6. [Single choice question] The meaning of FW5-10 load switch is (). （ A ）
A. Outdoor load switch with rated voltage of 10kV
B. Outdoor load switch with rated voltage of 5kV
C. Indoor load switch with rated voltage of 10kV
7. [Single choice] SFZ-10000/110 indicates three-phase natural circulation air-cooled on-load voltage regulation, rated capacity of ()kVA, high voltage winding rated voltage 110kV power transformer. （ B ）
A、36500
B、10000
C、8000
8. [Multiple choice question] A reverse gate operation ticket can only fill in () operation tasks at most. （ C ）
A. Three
B. Two
C. One
9. [Single choice question] Under normal circumstances, the straight rod cross-bearing and the pole top bracket are installed in (). （ A ）
A. Power side
B. Pull line side
C. Power supply side
10. [Multiple choice question] The following description of the characteristics of the protective gap is correct (). （ C ）
A. Good protection performance
B. Strong arc extinguishing ability
C. It is easy to cause ground short circuit fault
11. [Single choice question] The following description of the characteristics of the high-pressure valve type lightning arrester is correct (). （ C ）
A. There is less spark gap and valve plate in series, and the number decreases with the increase of voltage
B. There are few spark gaps and valve plates in parallel, and the number increases with the increase of voltage
C. There are many spark gaps and valve plates in series, and the number increases with the increase of voltage
12. [Single choice question] If the configuration of the small and medium-capacity high-voltage capacitor bank (), the action current can be 2-2.5 times the rated current of the capacitor bank. （ A ）
A. Current break protection
B. Overcurrent protection
C. Differential protection
13. [Single choice question] Any abnormal phenomenon found by the duty personnel should be eliminated in time, and when it cannot be eliminated in time, in addition to reporting to the superior leader in time, it should also be recorded in the operation record book and (). （ B ）
A. Maintenance record book
B. Defect record book
C. Accident record book
14. [Multiple choice question] Regarding the choice of potential and reference point of each point in the circuit, which of the following statements is correct (). （ B ）
A. The size of the potential of each point is related to the selection of the reference point, but the plus or minus is independent of the choice of the reference point
B. The size and positive and negative potentials of each point are related to the selection of reference points
C. The size of the potential of each point has nothing to do with the selection of the reference point, but the positive and negative are related to the selection of the reference point
15. [Single choice] The rated current of the transformer is equal to the rated capacity of the winding divided by the rated voltage of the winding and the corresponding coefficient (). （ A ）
A. Single-phase and three-phase are both √3
B. Single-phase and three-phase are both 1
C. Three phases are 1, single phases are √3
16. [Single choice question] The operation and management of the power distribution station implements the () system. （ C ）
A. "Two votes, two systems"
B. "Three votes, two systems"
C. "Two votes and three systems"
17. [Multiple choice question] In work, the common unit symbol of electrical energy is (). （ C ）
A、W
B、kW
C、kW?h
18. [Single choice] In a circuit with a series of resistors, the total resistance of the circuit is equal to (). （ C ）
A. The reciprocal of the sum of each series resistor
B. The average value of each series resistor
C. The sum of each series resistor
19. [Multiple Choice Question] If there is an abnormal situation to be handled in the process of handover, () is still responsible for handling, and if necessary, the successor can be asked to assist in the work. （ A ）
A. Shift personnel
B. Successors
C. Dispatcher
20. [Multiple Choice Question] If important operations need to be carried out during the handover process, () is still responsible for handling, and if necessary, the successor can be asked to assist in the work. （ B ）
A. Dispatcher
B. Shift personnel and successors
21. [Single choice question] The spring energy storage actuation mechanism is released when the gate is closed, () the stored energy is released to close the circuit breaker. （ B ）
A. Closing coil
B. Closing spring
C. Closing power supply
22. [Single choice question] When the approximate value of the current to be measured is not known, you should first use the ammeter of the () range to test. （ C ）
A. Smaller
B. Middle
C. Larger
23. [Single choice] When two coils are placed very close together, or two coils are wound on an iron core, if the current in one of the coils changes, the induced electromotive force generated in the other coil is called (). （ B ）
A. Self-induced electromotive force
B. Mutual inductive electromotive force
C. Alternating electromotive force
24. [Single choice] When the working temperature of the transformer insulation material () allows the value, its service life will be shortened. （ C ）
A. Below
B. Equal
C. Exceeded
25. [Single choice question] The newly installed capacitor should be qualified according to the () test before it is put into operation. （ B ）
A. Preventive test projects
B. Handover test project
C. Pilot projects formulated by enterprises themselves
26, [single choice] Some high-voltage capacitors are equipped with discharge resistors, which can be discharged through the discharge resistor, and when the capacitor is disconnected from the power grid, the discharge resistor reduces the capacitor voltage to below 75V after () minutes. （ C ）
A、1
B、20
C、10
27. [Single choice] The arc suppression coil is actually an iron core coil, which ( ) is very small and the reactance is very large. （ A ）
A. Resistance
B. Voltage
C. Reactance
28. [Single choice question] The electricity load is what the user needs for the power system at a certain time (). （ C ）
A. Voltage
B. Current
C. Power
29. [Single choice question] Electrical safety management personnel should have the necessary knowledge, and should formulate safety measures according to the actual situation, and organize safety management production in a planned manner. （ A ）
A. Electrical safety
B. Organizational management
C. Electrical foundation
30. [Single Choice Question] Before the electrical work starts, it must be completed (). （ C ）
A. Work interruption procedures
B. Handover procedures
C. Work permit procedures
31. [Single choice] The primary coil of the current transformer is connected to the circuit under test, the secondary coil is connected to the measuring instrument, and the polarity of the primary and secondary coils should be correct. （ C ）
A. Mixed
B. Parallel
C. Series
32, [single choice question] electric spark and arc is an important cause of electrical fire, because the temperature of electric spark is high, up to (), flammable materials are easy to ignite. （ A ）
A、3000℃-6000℃
B、1000℃-2000℃
C、500℃-800℃
33. [Multiple choice question] The energy meter belongs to the () instrument. （ B ）
A. Electromagnetic type
B. Inductive type
C. Electric type
34. [Single choice] When the circuit is in the () state, the current in the circuit will cause damage to the power supply, burn the wire, and even cause serious accidents such as fire because it is too large. （ B ）
A. Pathway
B. Short circuit
C. Broken circuit
35. [Multiple choice question] The straight pole tower is generally located in the line (). （ C ）
A. Corner
B. Tension resistance
C. Straight line segment
36. [Multiple choice question] The corner of the line is (). （ A ）
A. The line turns to the fill angle of the inner angle
B. The line turns to the inner corner
C. The angle of the line steering
37. [Multiple choice question] The line power test should be carried out phase by phase. When the multi-layer power line erected with the same pole is tested, the first (), the lower layer is a priori and the upper layer is later tested. （ A ）
A. Low pressure after low pressure inspection
B. High pressure or low pressure
C. Test low pressure
38. [Single choice question] Insulated boots (shoes) belong to (). （ A ）
A. Auxiliary safety appliances
B. General protective safety appliances
C. Insulation safety appliances
39. [Single choice question] The selectivity of the relay protection action can be achieved by reasonably adjusting the action time limit () and the upper and lower protection. （ B ）
A. Operating voltage
B. Action value
C. Range of motion
40, [single choice] relay protection () refers to the occurrence of a failure that belongs to its action, it can act reliably and when it should not act, it can not move reliably. （ C ）
A. Quickness
B. Selectivity
C. Reliability
41. [Single choice] The isolator switch of the device is in the closing position, and only the circuit breaker is disconnected, indicating that the equipment is in the () state. （ B ）
A. Run
B. Hot standby
C. Overhaul
42. [Multiple Choice Question] The order of reading () is: first AC and then DC and then signal, from top to bottom, from left to right, the hierarchy is clear. （ B ）
A. Schematic
B. Expand the chart
C. Installation diagram
43. [Single choice question] Lightning waves invade the transformer, distribution station or electrical equipment along the transmission line, causing damage to the electrical equipment of the substation and distribution station and the line, and this form of destruction is called (). （ C ）
A. Directly hit the mine
B. Induction thunder
C. Lightning wave intrusion
44. [Single choice] Rated voltage refers to the voltage level that the high-voltage circuit breaker can withstand when it is working normally, which determines the circuit breaker (). （ B ）
A. Heat resistance
B. Insulation level
C. On-off capability
45. [Single choice question] When working on the electrical equipment of all power outages and partial power outages, the technical measures that must be completed are: power outage () hanging ground wire installation of shading fences and hanging signs. （ B ）
A. Discharge
B. Power test
C. Inspection and safety inspection
46. [Single choice question] The splitting and closing indicator of the circuit breaker should be (), and the instructions should be accurate. （ C ）
A. Sealed with metal objects
B. Can be adjusted at will
C. Easy to observe
47. [Single choice] The primary coil of the current transformer is connected to the circuit under test, the secondary coil is connected to the measuring instrument, and the polarity of the primary and secondary coils should be correct. （ C ）
48. [Judgment question] Electricity between two phase lines. Safety Production Mock Exam One Point Pass. The voltage is called the line voltage. （ √ ）
49. [Judgment question] The dynamic and static contacts of the vacuum switch tube (arc extinguishing chamber) of the AC high-pressure vacuum contactor generally adopt disc-shaped contacts. （ √ ）
50. [Judgment question] Low voltage relay is a relay that reacts when the voltage drops to a certain set value and the following dynamic break contact point is changed from the open state to the closed state. （ √ ）
51. [Judgment question] The operation of the power failure pull gate must be operated in accordance with the order of the circuit breaker (switch) → power supply 'safety production simulation exam one-point pass' side isolator (knife gate) → load side isolator (knife gate). （ × ）
52. [Judgment Question] In the schematic diagram, the coils and contacts of each relay are separated and drawn in the circuit to which they belong, and all parts belonging to the same relay or component are marked with the same symbol. （ √ ）
53. [Judgment question] During the inspection and inspection, the vacuum arc extinguishing chamber of the vacuum circuit breaker should be free of abnormalities, and the shielding cylinder should have no traces of oxidation. （ √ ）
54. [Judgment question] When performing a full-station power outage operation, the switch of the capacitor bank should be disconnected first, and then the outlet switch of each branch should be stopped. （ √ ）
55. [Judgment question] The metal conductor used to receive thundercloud discharge in the lightning protection device is called a mine eliminator. （ × ）
56. [Judgment question] In the secondary wiring and lighting part of the high-voltage room, it is necessary to blackout the high-voltage equipment or do safety measures, and the first work ticket needs to be filled in. （ √ ）
57. [Judgment question] When the electrical equipment of a branch is closed, the reverse gate sequence is to close the isolating switch first, followed by the load switch, and finally the circuit breaker. （ √ ）
58. [Judgment question] For the motor, the increase in frequency will reduce its speed, resulting in a decrease in the power of the motor, which will affect the output of the rotating machinery driven by it, and affect the life of the motor. （ × ）
59. [Judgment Question] The work permit system refers to any electrical work carried out on electrical equipment, which must fill in the work ticket, and arrange safety measures and handle procedures such as starting and ending according to the work ticket. （ √ ）
60. [Judgment question] Live hanging ground wire, etc., will produce a strong arc, which will seriously burn people. （ √ ）
61. [Judgment Question] When the charged body has grounding and safety production, the farther away from the fault point, the greater the risk of electric shock in the step voltage. （ × ）
62. [Judgment Question] When the cross-sectional area is the same, the longer the length of the conductor of the same material, the greater the resistance of the conductor. （ √ ）
63, [Judgment question] When the system is short-circuited or grounded, through a large short-circuit current, the transformer will produce a lot of noise. （ √ ）
64. [Judgment question] The direction of the induced electromotive force is related to the direction of the magnetic field line and the direction of conductor motion. （ √ ）
65. [Judgment Question] All staff (including the person in charge of the work) are not allowed to stay alone in the high-voltage room and have been exempted from electric shock or arc burn accidents. （ √ ）
66. [Judgment Question] In the operation ticket, when an operation task needs to write multiple pages, the transfer page number must be indicated, and the page numbers are connected. （ √ ）
67. [Judgment question] If a thermal power plant generates both electricity and heat supply, it is called a thermal power plant. （ √ ）
68. [Judgment Question] Hot standby is one of the ways to automatically input the standby power supply. （ √ ）
69. [Judgment Question] Electric shock is a kind of damage to the internal organs of the human body through the passage of electric current through the human body. （ √ ）
70. 【Judgment question】 The basic structure of power cable is composed of four parts: wire core (conductor), insulation layer, shielding layer and grounding layer. （ × ）
71. [Judgment question] Power system reactive power compensation can play a role in reducing line loss, saving electric energy, improving the setting, and safety production simulation Examination is one-point pass, and the efficiency of utilization is prepared. （ √ ）
72. [Judgment question] Capacitor overload is a common fault and abnormal operating state of high voltage power capacitors. （ √ ）
73. [Judgment question] The longer the duration of the current, the more serious the harm of the current to the human body. （ √ ）
74. [Judgment question] Cables and capacitors should be fully discharged phase by phase before grounding. （ √ ）
75. [Judgment question] Power quality includes the quality of current, frequency and waveform. （ × ）
76. [Judgment question] The reliability of relay protection refers to the failure that belongs to its action, and it can act reliably; And when it shouldn't be moving, it can not move reliably. （ √ ）
77, [Judgment question] the installation of two transformers in the power zone substation or small user substation, the general load is more important or the load change is larger, need to often with load cutting, so the transformer high and low voltage side switches are used circuit breakers (low voltage side is equipped with low voltage circuit breakers, that is, automatic air switch). （ √ ）
78. [Judgment question] Through the phenomenon of electromagnetic induction, it can be known that the faster the magnetic flux in the coil changes, the smaller the induced electromotive force. （ × ）
79. [Judgment Question] For some power outages, temporary shading fences should be installed for uncut equipment whose safety distance is less than the specified distance. （ √ ）
80. [Judgment question] The high-voltage switch cabinet used for power supply by ring network is generally customarily called ring network cabinet. （ √ ）
81. [Judgment question] Repeated grounding refers to the multi-point grounding of the zero line of the transformer (the zero trunk line in the three-phase four-wire power supply system). （ √ ）
82. [Judgment question] High-voltage fuses with high breaking capacity have the advantages of strong breaking short-circuit current capability. （ √ ）
83. [Judgment question] The high-voltage fuse is blown when the circuit passes through the load current or short-circuit current. （ × ）
84. [Judgment Question] In order to ensure the safety of electrical operations, newly entered factory staff can only engage in electrical operations if they receive two-level safety education on the factory floor and other departments. （ × ）
85. [Judgment Question] In order to assess the insulation level of electrical equipment, the mainland stipulates that the maximum allowable operating voltage corresponding to 10kV is 11.5kV. (？ )（ × ）
86. [Judgment Question] In order to prevent direct lightning strikes on power equipment, lightning rods and lightning rods are generally used. (？ )（ √ ）
87. [Judgment question] The ratio of the induced potential of the first and second sides of the transformer is equal to the ratio of the turns of the first and second sides of the winding. ()（ √ ）
88. [Judgment question] The abnormal operating state of the transformer mainly includes: the overcurrent caused by the external short circuit of the protection range, the oil surface reduction caused by the leakage of the oil tank of the overload oil immersion transformer caused by the automatic starting of the motor, the safety production simulation test, the one-point pass, the slight inter-turn short circuit, etc. ()（ × ）
89. [Judgment question] In the circuit, the connection methods of resistors are mainly series parallel and mixed. ()（ √ ）
90. [Judgment question] The metal conductor used in the lightning protection device to receive the discharge of the thundercloud is called the flasher. (？ )（ √ ）
91. [Judgment question] The direction of the induced electromotive force is related to the direction of motion of the magnetic field line square conductor. ()（ √ ）
92. [Judgment question] There shall be no circuit breaker isolator or fuse between the grounding point of the grounding line and the maintenance equipment. ()（ √ ）
93. [Judgment Question] The tension-resistant pole tower in the overhead line is used to limit the scope of the line when the line is broken and reversed. ()（ √ ）
94, [Judgment Question] The main component of gas protection is the gas relay, which is installed in the joint pipe between the transformer tank and the oil pillow, and attention should be paid to making the arrow on the gas relay point to the side of the oil pillow. （ √ ）
95. [Judgment question] The voltage increase in the power system that endangers the insulation of electrical equipment is the short-pass voltage. (？ )（ × ）
96. [Judgment Question] After the automatic coincidence device is installed on the line, it plays a great role in improving the reliability of power supply. (？ )（ √ ）
97. [Judgment Question] Line fittings refer to metal accessories that connect and combine various devices on the line to transmit mechanical electrical loads and play a certain protective role. ()（ √ ）
98, [judgment question] good shake table, when the two connecting lines (LE) of the shake table are shorted, shake the handle, the pointer should be at "0". （ √ ）
99. [Judgment question] The principle of action of the lightning protection line is the same as that of the lightning rod, but the protection range is larger. (？ )（ × ）
100. [Judgment question] The characteristics of metal oxide lightning arrester include rapid action without freewheeling residual pressure and low throughput. (？ )（ √ ）
Support the examination questions of accurate high-voltage electric work industry examinations in all regions of the country, and support the practice of work types such as safety qualification certificates, special operation certificates, and vocational skills appraisal.