2022 high voltage electrician test question simulation test question bank and online simulation test

Source of question bank ： Safety production simulation test, a little public official account.

2022 High voltage electrician review question is a high voltage electrician exam 100 The whole question is simulated ！2022 High voltage electrician test questions simulation test question bank and online simulation test are based on high voltage electrician test materials . The high voltage electrician reexamination question bank has passed the safety production simulation examination to find the answers at one point .

1、【 Single topic selection 】 () It refers to the standby power supply or standby equipment or standby line with obvious disconnection under normal conditions .（  A  ）

A、 Open standby

B、 Cold standby

C、 Dark standby

2、【 Single topic selection 】 110KV And the following line protection measurement and control devices , When the switch is in the jump position and (), Time delay 10 Second report TWJ abnormal .（  A  ）

A、 The line has current

B、 The line has no voltage

C、 The line is under voltage

3、【 Single topic selection 】 SF6 Load switch - Before replacing the fuse, the fuse combination appliance shall ().（  A  ）

A、 Close the grounding switch

B、 Make the operating mechanism store energy

C、 Close the load switch

4、【 Single topic selection 】 SH11-M-50/10 Represents three-phase oil immersed self cooling type , Double winding non excitation voltage regulation , Amorphous alloy iron core , Sealed , Rated capacity 50kVA, The rated voltage of HV side winding is ()kV Power transformer .（  A  ）

A、10

B、20

C、35

5、【 Single topic selection 】 The following instruments are comparative instruments ().（  A  ）

A、 Grounding resistance measuring instrument

B、 A multimeter

C、 Megger

6、【 Single topic selection 】 The rated voltage and rated current indicated on the nameplate of AC electrical equipment refer to the combination of voltage and current ().（  C  ）

A、 Instantaneous value

B、 Maximum

C、 Valid values

7、【 Single topic selection 】 AC high voltage vacuum contactor is widely used in () Control of electrical equipment in other fields .（  A  ）

A、 Ocean Shipping

B、 Distribution line of distribution network

C、 Lightning protection equipment

8、【 Single topic selection 】 About 380/220V Mains system ,() The statement is correct .（  C  ）

A、220V and 380V It's all phase voltage

B、220V Is the line voltage ,380V Is the phase voltage

C、220V Is the phase voltage ,380V Is the line voltage

9、【 Single topic selection 】 Transformer protection belongs to () classification .（  B  ）

A、 Protection principle

B、 Protected object

C、 The role of protection

10、【 Single topic selection 】 The transformer capacity is ()kVA The following transformers 、 When the action time of overcurrent protection is greater than 0.5s when , user 3~10kV Relay protection of distribution transformer , Current quick break protection shall be installed .（  B  ）

A、6300

B、10000

C、8000

11、【 Single topic selection 】 The overload capacity of the transformer is generally the sum of the maximum capacity and rated capacity that the transformer can output () To express .（  C  ）

A、 Bad

B、 and

C、 Than

12、【 Single topic selection 】 In the production and operation activities of the enterprise , The measures to promote unity and cooperation among employees are .（  B  ）

A、 Mutual benefit , Average distribution

B、 Strengthen communication , Equal dialogue

C、 Just cooperate , Don't compete

D、 man 's heart is incomprehensible , Be careful

13、【 Single topic selection 】 When energy consumption braking is adopted for three-phase asynchronous motor , When the power is cut off , take ().（  D  ）

A、 The rotor circuit is connected in series with a resistor

B、 Reverse connection of any two-phase winding of stator

C、 Reverse connection of rotor winding

D、 The stator winding is fed with DC

14、【 Single topic selection 】 The clamp on ammeter used to measure AC current is made of () And an ammeter .（  A  ）

A、 Current transformer

B、 Voltage transformer

C、 Diverter

D、 transformer

15、【 Single topic selection 】17 The binary number is ( ).（  A  ）

A、10001

B、10101

C、10111

D、10010

16、【 Single topic selection 】 stay 110kV And above , Generally, the neutral point is directly grounded , With ().（  C  ）

A、 Ensure the safety of personnel and equipment

B、 Protect personal safety

C、 Reduce the insulation level of the equipment

17、【 Single topic selection 】 Unidirectional half wave controllable rectifier circuit , If the average load current is 10mA, The average current actually passing through the rectifier diode ( ).（  D  ）

A、5A

B、0

C、10mA

D、20mA

18、【 Single topic selection 】 understand ( ) Not the purpose of reading the assembly drawing .（  C  ）

A、 The name of the machine or part 、 working principle

B、 The mutual position between parts

C、 Dimensions of all parts

D、 Function and structural characteristics of each part

19、【 Single topic selection 】 When working on electrical equipment with total power failure and partial power failure , The technical measures that must be completed include : power failure 、()、 Hang the grounding wire 、 Install barriers and hang signs .（  A  ）

A、 Electricity test

B、 discharge

C、 Patrol safety inspection

20、【 Single topic selection 】 A fault occurred inside the transformer ( Such as insulation breakdown 、 Phase to phase short circuit 、 Turn to turn short circuit 、 Iron core accident, etc ) produce () when , Turn on the signal or trip circuit , Alarm or trip , To protect the transformer .（  C  ）

A、 solid

B、 Liquid

C、 Gas

21、【 Single topic selection 】 In inductive load AC circuit , use () The method can improve the power factor of the circuit .（  C  ）

A、 Series resistance

B、 Series capacitors

C、 Parallel capacitance

22、【 Single topic selection 】 When under voltage protection device is installed for high-voltage electric motor , The setting voltage of the secondary motor is taken as ( ).（  C  ）

A、（40～50）%UN

B、（50～60）%UN

C、（60～70）%UN

D、（70～80）%UN

23、【 Single topic selection 】 In the maintenance of transformer , When installing grounding wire , Should be ().（  C  ）

A、 First install the middle phase

B、 Install the wire end first , Then install the grounding terminal

C、 Install the grounding terminal first , Then install the wire end

24、【 Single topic selection 】A0 The standard dimension of the drawing is width （B）F Long （L） yes ( ).（  C  ）

A、600F1200

B、594F841

C、841F1189

D、594F1189

25、【 Single topic selection 】 Binary number 1011101 Equal to a decimal number ( ).（  B  ）

A、92

B、93

C、94

D、95

26、【 Single topic selection 】 The secondary wiring and lighting circuit in the high voltage room work , When it is necessary to cut off the power of high-voltage equipment or take safety measures, it should be used ().（  C  ）

A、 Verbal instructions

B、 The second kind of work ticket

C、 The first kind of work ticket

27、【 Single topic selection 】 Energy consumption braking of three-phase asynchronous motor , Mechanical energy is converted into electrical energy and consumed in () On the resistance of the circuit .（  D  ）

A、 excitation

B、 control

C、 Stator

D、 rotor

28、【 Single topic selection 】 The basic control modes of variable frequency speed regulation are 、 Constant voltage, constant current and other control modes .（  D  ）

A、 Constant power factor

B、 Constant speed

C、 Constant slip

D、 Constant voltage frequency ratio

29、【 Single topic selection 】 When putting out a fire , Firefighters should stand in () Put out the fire .（  A  ）

A、 Upwind side

B、 Downwind side

C、 The side

30、【 Single topic selection 】 Multivibrator is a commonly used generator ( ) Circuit .（  A  ）

A、 Rectangular pulse

B、 Square wave pulse

C、 Sawtooth pulse

D、 Sharp pulse

31、【 Single topic selection 】 To prevent potential difference spark and ring fire , For motor without compensation winding, the voltage between commutators shall not exceed ( ) v .（  B  ）

A、18

B、17

C、14

D、10

32、【 Single topic selection 】 Electrical equipment has three working states , I.e. operation 、 spare 、().（  C  ）

A、 Cold standby

B、 Hot standby

C、 Maintenance status

33、【 Single topic selection 】FX2N series PLC The mnemonic of the carry cycle right shift instruction in is .（  A  ）

A、RCR

B、ROR

C、WSFR

D、SFTR

34、【 Single topic selection 】 The number of turns of primary winding of current transformer is very small ,() On the line , Its current depends on the load current of the line .（  C  ）

A、 Mixed combination

B、 parallel connection

C、 Series connection

35、【 Single topic selection 】 The action time limit of overload protection device is ( ).（  D  ）

A、6S

B、7S

C、8S

D、9～10S

36、【 Single topic selection 】 The weldment shall be preheated before red copper welding , Generally, the flame energy rate higher than that of low carbon steel should be selected during gas welding , The reason is ().（  C  ）

A、 Improve the strength of welded joints

B、 Prevent evaporation of zinc

C、 Red copper has good heat conduction and is difficult to fuse

D、 Prevent cold cracks

37、【 Single topic selection 】 The density of magnetic lines of force in a certain region in a magnetic field is related to the strength of the magnetic field in that region ().（  C  ）

A、 Sinusoidal law

B、 In inverse proportion

C、 In direct proportion to

38、【 Single topic selection 】 What items should the transformer go through after passing the measurement , To conduct AC withstand voltage test ( ).（  D  ）

A、 Insulation resistance and absorption ratio

B、 Leakage current

C、 Dielectric loss

D、 All the above items

39、【 Single topic selection 】 In the iron carbon equilibrium diagram , Indicates that the mass fraction of carbon is lower than 0.8% The line of temperature at which ferrite begins to precipitate from austenite during slow cooling of steel is ().（  B  ）

A、ACD Line

B、GS Line

C、ES Line

D、PSK Line

40、【 Single topic selection 】 Extinguish the DC arc , The usual approach is ()（  A  ）

A、 The method of lengthening and strong cooling the arc

B、 Spread the arc

C、 Reunite with

D、 Narrow slit arc extinguishing

41、【 Single topic selection 】 Lightning arrester and protected equipment () Connect .（  B  ）

A、 Series connection

B、 parallel connection

C、 Series or parallel

42、【 Single topic selection 】 In the power distribution device , The height of mesh barrier of electrical equipment shall not be less than ()m, The bottom should not be more than 0.' Ann Full production Pass the mock exam at one point '1m.（  B  ）

A、1.3

B、1.7

C、1.5

43、【 Single topic selection 】 The input resistance of the multi-stage amplification circuit of the resistance capacitance coupling is equal to ,( )（  A  ）

A、 First stage input resistance

B、 Sum of input resistances at all levels

C、 Product of input resistances at all levels

D、 No stage input resistance

44、【 Single topic selection 】 When the commutator surface is rough , In case of minor burns , You should use ( ) Remove defects .（  C  ）

A、 Emery cloth

B、 Flat file

C、N320 Fine emery cloth

D、 Lathe

45、【 Single topic selection 】 The area where the arc is close to the positive electrode is the anode area , The anode region is wider than the cathode region , But it is only ().（  C  ）

A、10-1~10-2

B、10-2~10-3

C、10-3~10-4

D、10-4~10-5

46、【 Single topic selection 】 The shell of three-phase asynchronous motor is charged , The possible cause of the failure is （）.（  B  ）

A、 The power supply voltage is too high

B、 Poor grounding or high grounding resistance

C、 Too much load

D、 The axis of the motor and the load is wrong

47、【 Single topic selection 】 The magnetic field around a long straight current carrying wire , The closer to the wire , Magnetic line of force ().（  A  ）

A、 The denser the distribution

B、 The more sparse the distribution

C、 The longer the

48、【 Single topic selection 】 In the trigger circuit of resistance capacitance phase-shifting bridge , When the resistance R Get smaller , How the amplitude of the output trigger signal will change .（  C  ）

A、 Bigger

B、 smaller

C、 unchanged

D、 Not sure

49、【 Single topic selection 】 Find the DC grounding method of substation , Which of the following is wrong ( ).（  A  ）

A、 Search by light bulb method

B、 When DC is grounded, it is forbidden to work on the secondary circuit

C、 The treatment shall not cause DC short circuit and grounding at another point

D、 Necessary measures shall be taken before pulling the road , Prevent DC power loss from causing maloperation of protection and automatic devices

50、【 Single topic selection 】 In case of grounding fault of high voltage equipment conductor , The human body shall not approach the grounding fault point indoors () within .（  A  ）

A、4m

B、8m

C、10m

51、【 Single topic selection 】 The power plant is far away from the power load center , In order to reduce network loss , So we must build () High voltage and ultra-high voltage transmission lines , Transfer electric energy from the power plant to the load center .（  A  ）

A、 Step up substation

B、 Step down substation

C、 Medium voltage substation

52、【 Single topic selection 】 DC arc produced by low-voltage apparatus is a transient process from combustion to extinction , There are often ( ) The phenomenon .（  C  ）

A、 Overcurrent

B、 Under current

C、 Over voltage

D、 Undervoltage

53、【 Single topic selection 】 Electrodes used in arc welding are coated with ( ) The melting electrode is called electrode .（  A  ）

A、 Medicine skin

B、 Powder

C、 coating

D、 Flux

54、【 Single topic selection 】 In a circuit with three resistors in parallel , It is known that the currents of the three parallel branches are 4A8A and 15A, Then the current of the circuit is equal to ()A.（  C  ）

A、9

B、15

C、27

55、【 Single topic selection 】 In a pulse circuit , Choose ( ) The triode .（  B  ）

A、 Strong amplification ability

B、 Fast switching speed

C、 The maximum dissipation power of collector is high

D、 Cheapness

56、【 Single topic selection 】 Put one 1μF The capacitance of is connected to 50Hz,220V On AC power supply , The current through the capacitor is ( ).（  A  ）

A、69mA

B、110mA

C、170mA

D、50mA

57、【 Single topic selection 】 stay TIG During welding , The measures to destroy and remove the oxide film are ().（  D  ）

A、 Manganese and silicon are added to the welding wire for deoxidization

B、 Direct current positive welding is adopted

C、 Increase welding current

D、 AC welding is adopted

58、【 Single topic selection 】 The unit of voltage is volts , Use symbols () Express .（  C  ）

A、C

B、A

C、V

D、F

59、【 Single topic selection 】 When strip electrode submerged arc surfacing , The proper composition of the welding strip is the key , One · Safety production mold I plan to pass the exam at one point · The commonly used welding strip is ( ).（  A  ）

A、60mm

B、50mm

C、40mm

D、80mm

60、【 Single topic selection 】 The rotor pole of a synchronous motor is equipped with an excitation winding , from ( ) excitation .（  C  ）

A、 Sinusoidal alternating current

B、 Three phase symmetrical alternating current

C、 Direct current

D、 pulse current

61、【 Single topic selection 】 Three resistors Ｒ1、R2、R3 Connected in series to a DC power supply , It is known that the relationship between the three resistances is R1＞Ｒ2＞Ｒ3, Then the voltage relationship between them is ().（  B  ）

A、U1＝U2＝U3

B、U1＞Ｕ2＞Ｕ3

C、Ｕ1＜Ｕ2＜Ｕ3

D、Ｕ2＞Ｕ1＞Ｕ3

62、【 Single topic selection 】 Models for JDJJ-10 Single phase three coil oil immersed outdoor voltage transformer , Conduct AC withstand voltage test line inspection after overhaul , The test withstand voltage standard is ( ) Kilovolt .（  B  ）

A、24

B、38

C、10

D、15

63、【 Single topic selection 】 Make , Ann Full production Mock test Try a little , When the cable terminal , The oil resistant rubber pipe shall be sleeved to the root of the offline core () In the distance .（  B  ）

A、10mm

B、20mm

C、30mm

D、40mm

64、【 Single topic selection 】 For maintenance work on the low-voltage distribution board and low-voltage distribution box of the operating control panel, use ().（  B  ）

A、 The first kind of work ticket

B、 The second kind of work ticket

C、 Verbal instructions

65、【 Judgment questions 】 In general, the arc extinguishing capacity of vacuum interrupter for circuit breaker is stronger than that of vacuum interrupter for vacuum contactor .（  √  ）

66、【 Judgment questions 】 A three-phase AC circuit has three alternating electromotive forces , They have the same frequency 、 In the same way .（  ×  ）

67、【 Judgment questions 】 Programmable controller has complex logic operation function , Relay control cannot be realized .（  √  ）

68、【 Judgment questions 】 To prevent personal electric shock , Water cannot be used for live fire extinguishing .（  √  ）

69、【 Judgment questions 】 In AC circuit , When the arc current transiently crosses zero, the arc will disappear , After that, if the dielectric breakdown voltage between the contacts ≤ Recovery voltage , The arc will re ignite .（  √  ）

70、【 Judgment questions 】 When drawing the conceptual diagram of stator winding of explicit three-phase single speed four pole asynchronous motor , A total of twelve polar groups should be drawn .（  √  ）

71、【 Judgment questions 】 The direct contact electric shock between human body and electrified body can be divided into step voltage electric shock 、 Contact voltage electric shock .（  ×  ）

72、【 Judgment questions 】 In case of power failure and maintenance of low-voltage electrical equipment , In order to prevent maintenance personnel from going to the wrong position , Enter the charged interval by mistake and get too close to the live part , Generally, barriers are used for protection .（  √  ）

73、【 Judgment questions 】 When welding gray cast iron with electrode arc welding and thermal welding , High thermal stress , Welded joints are easy to produce 、 Safety production simulation test 1 Diantong 、 Crack formation .（  ×  ）

74、【 Judgment questions 】 When installing the voltage transformer, the shell must be properly grounded .（  √  ）

75、【 Judgment questions 】() The symbol of Zener diode is the same as that of ordinary diode .（  ×  ）

76、【 Judgment questions 】() Poor solderability of copper .（  ×  ）

77、【 Judgment questions 】 The output power of the power amplifier is given by the transistor itself .（  ×  ）

78、【 Judgment questions 】 In step-down substation , A transformer is an electrical device that changes a high voltage to a low voltage .（  √  ）

79、【 Judgment questions 】 The protection range of a single lightning rod on the roof can be determined according to 45° The protection angle is determined .（  ×  ）

80、【 Judgment questions 】 Because the voltage in the insulation is distributed according to the resistance under DC withstand voltage , Can make defects more easily exposed , Therefore, DC withstand voltage test is mostly applied to high-voltage power cables .（  √  ）

81、【 Judgment questions 】 The direction of the induced electromotive force and the direction of the magnetic field line 、 The direction of conductor movement is related .（  √  ）

82、【 Judgment questions 】 In our country 10kV,6kV Power grid , In order to improve the reliability of power supply , Generally, the neutral point is directly grounded .（  ×  ）

83、【 Judgment questions 】 If the AC ammeter is to expand the range, it shall be equipped with a shunt .（  ×  ）

84、【 Judgment questions 】() The transistor trigger circuit is controlled by a synchronous power supply 、 Phase shift control and pulse forming .（  √  ）

85、【 Judgment questions 】 Short circuit is a normal circuit operation state .（  ×  ）

86、【 Judgment questions 】 The line shall be tested phase by phase ‘ Safety production mold I'm going to take the exam a little through ‘ Conduct .（  √  ）

87、【 Judgment questions 】 Each type of oil circuit breaker must be overhauled one year after it is newly installed and put into operation .（  √  ）

88、【 Judgment questions 】 The voltage of transmission line is generally 110kV And above ,220kV The above is also called EHV transmission line .（  ×  ）

89、【 Judgment questions 】55KV Three phase asynchronous motor shall be selected DZ10～100/200 Air circuit breaker for .（  ×  ）

90、【 Judgment questions 】 The construction scheme of integral lifting of reinforced concrete pole includes construction method and plane layout , Selection and operation precautions and safety measures of holding pole and tools and instruments .（  √  ）

91、【 Judgment questions 】() In order to ensure that the thyristor works correctly , Requirements for trigger circuit ： There should be enough trigger voltage .（  √  ）

92、【 Judgment questions 】 Before and after the power test, the test shall be carried out on the equipment or line with power , To check whether the electroscope used is in good condition .（  √  ）

93、【 Judgment questions 】 When the shell of high voltage capacitor has special-shaped expansion , Generally, it is not necessary to shut down the capacitor immediately .（  ×  ）

94、【 Judgment questions 】 The speed negative feedback speed regulation system can effectively suppress all disturbances surrounded in the negative feedback loop .（  ×  ）

95、【 Judgment questions 】 In order to prevent direct lightning strike, power equipment , Generally, lightning rods and wires are used .(？)（  √  ）

96、【 Judgment questions 】 Use coal, oil, natural gas, etc. as fuel , The chemical energy of fuel combustion is converted into heat energy , Then, with the help of thermal machinery such as steam turbine, the heat energy is changed into mechanical energy , The steam turbine drives the generator to change mechanical energy into electrical energy , This kind of power plant is called thermal power plant .()（  √  ）

97、【 Judgment questions 】 The exposed conductive parts of electrical equipment ( Such as metal shell of electrical equipment, metal frame of power distribution device, etc ) Connecting with the earth through grounding device is called protective grounding .()（  √  ）

98、【 Judgment questions 】 The maintenance personnel did not see the grounding wire hanging at the working place , Work Permit Holder ( be on duty ) The maintenance personnel of the power-off equipment that has not been tested by hand shall question and have the right to refuse to work .（  √  ）

99、【 Judgment questions 】 The voltage rise endangering the insulation of electrical equipment in the power system is short circuit overvoltage .(？)（  ×  ）

100、【 Judgment questions 】 During the disconnection of the dynamic and static contacts in the vacuum interrupter , The main factor of generating electric arc is to generate electric arc between contacts by relying on the metal vapor generated by contacts .()（  √  ）

Support the examination questions of precise high-voltage electrician operation in all regions of the country , Support safety certificate , Special operation certificate , Exercises on the question bank of vocational skill appraisal and other types of work .