2022 simulated examination platform operation of high voltage electrician work license question bank

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

2022 High voltage electrician training test questions are high voltage electrician operation test questions and computer test exercises ！2022 The simulated examination platform of high voltage electrician's work license question bank is operated according to the latest compilation of high voltage electrician teaching materials . High voltage electrician exercises are available at any time according to the safety production simulation test .

1、【 Single topic selection 】 Before using electroscope to check electricity , In addition to checking the appearance, voltage level and test qualification period , And ().（  C  ）

A、 Self test luminescence

B、 Self test sound

C、 Test it on live equipment

2、【 Single topic selection 】 stay () in , The magnitude and direction of electromotive force voltage and current vary sinusoidally with time .（  B  ）

A、 DC circuits

B、 Sinusoidal AC circuit

C、 Pulse circuit

3、【 Single topic selection 】 An electric field in which the amount and position of the charge do not change is called ().（  C  ）

A、 Uniform electric field

B、 Rotating electric field

C、 electrostatic field

4、【 Single topic selection 】 SF6 The circuit breaker is used () As insulating medium and arc extinguishing medium .（  A  ）

A、 Gas SF6

B、 liquid state SF6

C、 Decomposed low sulfur fluoride SF6

5、【 Single topic selection 】 In a sinusoidal AC circuit , Voltage, current and electromotive force vary with time ().（  C  ）

A、 Aperiodic

B、 Constant constant constant constant constant constant constant constant constant constant constant constant constant constant constant constant constant constant constant constant constant constant constant constant constant constant constant constant constant constant constant constant constant constant constant constant constant constant constant constant constant constant constant constant constant constant constant constant constant constant constant constant constant constant constant constant constant constant

C、 Varying sinusoidally

6、【 Single topic selection 】 The polarity is reversed when measuring DC voltage with the DC voltage gear of digital multimeter , be ().（  A  ）

A、 The measured voltage value needs to be reversed to be the real voltage value

B、 The voltage value can be measured directly

C、 The multimeter may be damaged

7、【 Single topic selection 】 Electrical equipment has three working states , namely () Standby maintenance status .（  A  ）

A、 function

B、 Hot standby

C、 test

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

A、4m

B、8m

C、10m

9、【 Single topic selection 】 In the power system , The methods used to limit the short-circuit current are ,()、 Split winding transformer and sectional reactor are adopted 、 Adopt line reactor 、 Microcomputer protection and integrated automation device are adopted .（  C  ）

A、 Shunt capacitor

B、 Vacuum circuit breaker

C、 Select the appropriate wiring mode

10、【 Single topic selection 】 Transformer oil is a flowing liquid , It can fill the air gap between the components in the oil tank , Remove the air , So as to prevent the insulation strength from being affected by moisture ().（  B  ）

A、 elevated

B、 Reduce

C、 When high low

11、【 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

12、【 Single topic selection 】 In a sinusoidal AC circuit , voltage 、 electric current 、 The electromotive force varies with time ().（  B  ）

A、 Aperiodic

B、 Varying sinusoidally

C、 Constant constant constant constant constant constant constant constant constant constant constant constant constant constant constant constant constant constant constant constant constant constant constant constant constant constant constant constant constant constant constant constant constant constant constant constant constant constant constant constant constant constant constant constant constant constant constant constant constant constant constant constant constant constant constant constant constant constant

13、【 Single topic selection 】 One of the conditions for ideal parallel operation of transformers is ().（  A  ）

A、 A part of the transformer 、 The secondary voltages are equal

B、 A part of the transformer 、 Secondary voltage error ±1%

C、 A part of the transformer 、 The secondary voltages are equal ±2%

14、【 Single topic selection 】 The power lines of the power network can be generally divided into ().（  A  ）

A、 Transmission and distribution lines

B、 Transmission lines and power lines

C、 High voltage lines and distribution lines

15、【 Single topic selection 】 KYN28-10 The interlocking device for preventing misoperation of trolley and grounding switch in series high-voltage switchgear includes ().（  B  ）

A、 When the rocker of grounding switch has not been removed , The trolley can change from the positioning state of the test position to the moving state

B、 The grounding switch is in the closing position , The trolley cannot change from the positioning state to the moving state

C、 The grounding switch is in the opening position , The trolley cannot change from the positioning state to the moving state

16、【 Single topic selection 】 When the injured person with electric shock is found to have stopped breathing and heartbeat , Should be used immediately on site () Rescue on site , To support breathing and circulation .（  C  ）

A、 First aid law

B、 Artificial respiration

C、 Cardiopulmonary resuscitation

17、【 Single topic selection 】 Direction unchanged , A current whose magnitude fluctuates with time is called ().（  B  ）

A、 Sinusoidal alternating current

B、 Pulsating alternating current

C、 Simple harmonic alternating current

18、【 Single topic selection 】 Handover test shall be conducted before laying new cables , After the completion of installation and before putting into operation ().（  C  ）

A、 AC withstand voltage test

B、 DC withstand voltage test

C、 Handover test

19、【 Single topic selection 】 The height of a single lightning rod is h, Its ground protection radius is ().（  B  ）

A、1.8h

B、1.5h

C、2.0h

20、【 Single topic selection 】 Potential between any two points in the circuit () Called voltage ( Or potential difference ).（  A  ）

A、 The difference between the

B、 The sum of the

C、 Product of

21、【 Single topic selection 】 Relay protection () It refers to when the power system fails , The protection device only cuts off the faulty element , So that the non fault components can still operate normally , To minimize the scope of power failure .（  A  ）

A、 selectivity

B、 reliability

C、 Rapidity

22、【 Single topic selection 】 Hang on the operating handle of the circuit breaker and disconnector that have been powered off () Signs , Prevent the operator from closing the circuit breaker and disconnector by mistake .（  A  ）

A、 No switching on , Someone is working

B、 Work here

C、 Stop , High pressure danger

23、【 Single topic selection 】 Because the hand-held electrical tools are mobile when in use , The power line is easy to be dragged and worn, and the shell is touched or fallen off, resulting in the charged metal shell of the equipment , Lead to ().（  A  ）

A、 Electric shock accident

B、 Power failure accident

C、 Short circuit accident

24、【 Single topic selection 】 Physical quantity characterizing the magnetic conductivity of magnetic medium , be called ().（  A  ）

A、 Permeability

B、 Flux

C、 Magnetic induction intensity

25、【 Single topic selection 】 The circuit is in () In the state of , The current in the circuit will damage the power supply due to excessive current 、 Burn the wires , Even cause serious accidents such as fire .（  B  ）

A、 access

B、 A short circuit

C、 Open circuit

26、【 Single topic selection 】 Power load is the demand of users for power system at a certain time ().（  C  ）

A、 voltage

B、 electric current

C、 power

27、【 Single topic selection 】 Electrical equipment has three working states , namely ()、 spare 、 Maintenance status .（  C  ）

A、 test

B、 Hot standby

C、 function

28、【 Single topic selection 】 Spring energy storage operating mechanism when the circuit breaker is in operation , The power supply disconnector of the energy storage motor shall be at ().（  A  ）

A、 Closed position

B、 Off position

C、 Open or closed position

29、【 Single topic selection 】 Main protection refers to meeting the requirements of system stability and equipment safety , At the fastest speed () Remove the protection of the fault of the protected element .（  C  ）

A、 sensitive

B、 Fast

C、 Choice

30、【 Single topic selection 】 Turns of primary winding of current transformer () Number of turns of secondary winding .（  A  ）

A、 Less than

B、 Greater than

C、 be equal to

31、【 Single topic selection 】 Three phase transformer Dyn11 Winding wiring indicates that the primary winding is connected into ().（  A  ）

A、 triangle

B、 Stars

C、 square

32、【 Single topic selection 】 The potential difference between two points in a circuit ().（  B  ）

A、 The size is related to the selection of reference points , Positive and negative have nothing to do with the choice of reference point

B、 The size and positive and negative are independent of the selection of reference points

C、 The size has nothing to do with the selection of reference points , The positive and negative are related to the selection of reference points

33、【 Single topic selection 】 When measuring the current in the circuit , The ammeter shall () In this circuit .（  B  ）

A、 parallel connection

B、 Series connection

C、 Mixed combination

34、【 Single topic selection 】 In case of power failure and maintenance of high-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 , It is generally used () Protection .（  B  ）

A、 Insulating table

B、 Block

C、 Insulating pad

35、【 Single topic selection 】 One of the functions of the disconnector is ().（  C  ）

A、 Isolate the electric field

B、 Isolation current

C、 Isolate the power supply

36、【 Single topic selection 】 Control panel in operation 、 Low voltage distribution board 、 For maintenance work on the low-voltage distribution box, use ().（  A  ）

A、 The second kind of work ticket

B、 The first kind of work ticket

C、 Verbal instructions

37、【 Single topic selection 】 The work ticket shall be issued by () Issue .（  A  ）

A、 Work ticket issuer

B、 Person in charge of the work

C、 Work Permit Holder

38、【 Single topic selection 】 When measuring resistance with a multimeter , You need to () As a measuring power supply .（  A  ）

A、 In meter battery

B、 External power supply

C、 Resistance voltage

39、【 Single topic selection 】 Instrument transformer is divided into two parts () Two kinds of .（  B  ）

A、 Power transformers and current transformers

B、 Current transformer and voltage transformer

C、 Special transformer and current transformer

40、【 Single topic selection 】 When the high voltage capacitor in operation explodes , First of all ().（  B  ）

A、 Protect the site for disposal

B、 Cut off the connection between the capacitor and the power grid

C、 Fire fighting

41、【 Single topic selection 】 A switching operation ticket can only be filled in at most () Operational tasks .（  C  ）

A、 Three

B、 Two

C、 One

42、【 Single topic selection 】 The following () It belongs to basic safety appliances .（  C  ）

A、 Portable grounding wire 、 Temporary shelter

B、 Insulating gloves 、 Insulating boots

C、 Insulating rod 、 Insulation clamp

43、【 Single topic selection 】 The grounding resistance of working grounding shall not exceed ()Ω.（  B  ）

A、3

B、4

C、5

44、【 Single topic selection 】 When adjusting the tap of the arc suppression coil, the inductance current of the arc suppression coil is equal to the grounding capacitance current , Then the current flowing through the grounding point is ()A, Called full compensation .（  C  ）

A、5

B、10

C、 zero

45、【 Single topic selection 】 When measuring the insulation of electrical equipment with a megger ,“ line ”(L) The terminal post shall be connected to ().（  C  ）

A、 The insulation of the cable

B、 On the shell or ground wire of electrical equipment

C、 Motor winding or conductor

46、【 Single topic selection 】 When a single-phase electric shock occurs to the human body , The voltage acting on the human body is ().（  A  ）

A、 Phase voltage

B、 Line voltage

C、 Contact voltage

47、【 Judgment questions 】 Electric injury refers to the thermal effect of electric current during electric shock 、 Chemical effects and biological effects caused by electric stinging damage to the appearance of the human body .（  √  ）

48、【 Judgment questions 】 Individual current transformers are damaged during operation and need to be replaced , The voltage level shall be the same as the rated voltage of the power grid 、 The transformation ratio is the same 、 The accuracy level is the same , The polarity is correct 、 Current transformer with similar volt ampere characteristics , And pass the test .（  √  ）

49、【 Judgment questions 】 The density of magnetic lines of force in a region is inversely proportional to the strength of the magnetic field in that region .（  ×  ）

50、【 Judgment questions 】 On the closed core of the transformer , There are two windings which are insulated from each other , among , The side connected to the power supply is called the secondary winding , One side of the output electric energy is the primary winding .（  ×  ）

51、【 Judgment questions 】 The rated voltage is 10kV The circuit breaker can be used for 6kV System .（  √  ）

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

53、【 Judgment questions 】 For the label of the secondary circuit , Numbering according to the nature and purpose of the line is called relative numbering method .()（  ×  ）

54、【 Judgment questions 】 From the generator of the power plant to the substation , This whole is called the power system .（  ×  ）

55、【 Judgment questions 】 In the power supply requirements , For particularly important loads in a class of loads , In addition to being powered by two independent power supplies , Emergency power supply shall also be added , And other loads can be connected to the emergency power supply system .（  ×  ）

56、【 Judgment questions 】 Transformer is a special kind of transformer .（  √  ）

57、【 Judgment questions 】 The issuer of the work ticket shall not concurrently act as the person in charge of the work for which the work ticket is issued .（  √  ）

58、【 Judgment questions 】 Equipment for power outage maintenance , The operating power supply of the circuit breaker and disconnector of the power supply on each side shall also be disconnected .（  √  ）

59、【 Judgment questions 】 Lightning arrester is used to protect transformer from high-voltage lightning wave 、 In power distribution substation or other buildings , Damage to protected equipment .（  √  ）

60、【 Judgment questions 】 In order to monitor the temperature of various parts of the transformer during operation , The above oil temperature is specified as the allowable temperature .（  √  ）

61、【 Judgment questions 】35~110kV Overhead lines , If the lightning conductor is not erected along the whole line , It should be in the substation 1~2km Install lightning protection wire in the incoming section of .(？)（  √  ）

62、【 Judgment questions 】 Tension poles and towers in overhead lines are used to limit the scope of the line when the line breaks and falls .()（  √  ）

63、【 Judgment questions 】 When the height of the ladder is greater than 6m when , The upper, middle and lower ends shall be bound .（  √  ）

64、【 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 .（  √  ）

65、【 Judgment questions 】 The insulation level of the circuit breaker is independent of the rated voltage of the circuit breaker .（  ×  ）

66、【 Judgment questions 】 The tubular arrester consists of a gas producing pipe 、 Internal clearance and external clearance are three parts .（  √  ）

67、【 Judgment questions 】 The lightning rod and its grounding device cannot be installed in places where people and animals often pass .(？)（  √  ）

68、【 Judgment questions 】 electric shock , It is a kind of damage to the internal organs of the human body caused by electric current passing through the human body .（  √  ）

69、【 Judgment questions 】 Steel strand is often used as overhead ground wire 、 Grounding down lead and stay wire of tower .（  √  ）

70、【 Judgment questions 】 When installing the grounding wire , The grounding wire can be directly wound on the equipment to be grounded .（  ×  ）

71、【 Judgment questions 】 The tangent direction of a point on the magnetic line of force is the direction of the magnetic field at that point .（  √  ）

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

73、【 Judgment questions 】 The length of the power distribution unit exceeds 6m when , There should be two exits to this room or other rooms behind the screen , The distance should not be greater than 20m.（  ×  ）

74、【 Judgment questions 】 In the lightning protection device, the metal conductor used to receive lightning cloud discharge is called lightning eliminator .（  ×  ）

75、【 Judgment questions 】 For differential protection , Differential protection on both sides of the transformer CT All shall be connected into a star .（  ×  ）

76、【 Judgment questions 】 Use insulating rods , You don't have to wear insulating gloves and insulating boots .()（  ×  ）

77、【 Judgment questions 】 Of DC voltmeter “+” The high potential point of the terminating circuit ,“-” The low potential point of the terminating circuit .（  √  ）

78、【 Judgment questions 】 If someone works on the line , The circuit breaker shall be installed on the line ( switch ) And disconnectors ( Knife switch ) Hang on the operating handle “ No switching on , The line is working !” The signboard .（  √  ）

79、【 Judgment questions 】 The more turns of the energized coil , The stronger the magnetic field around it .（  √  ）

80、【 Judgment questions 】 Single phase high voltage capacitor with the same rated voltage and rated capacity , When connected to the power grid with the same voltage level , The connection mode of capacitor bank is connected into triangle and star, and the compensation effect is the same .（  ×  ）

81、【 Judgment questions 】 The power failure and switching operation must be in accordance with the circuit breaker ( switch )→ Power side disconnector ( Knife switch )→ Load side disconnector ( Knife switch ) Operate in sequence .（  ×  ）

82、【 Judgment questions 】 The porcelain bushing of the voltage transformer in operation is broken and seriously discharged , Can continue to run .()（  ×  ）

83、【 Judgment questions 】 In case of fire in electrical devices or equipment or ignition of nearby combustibles , First, cut off the power .（  √  ）

84、【 Judgment questions 】 Sulfur hexafluoride (SF6) After the low air pressure locking device of the circuit breaker acts , The opening and closing operation can still be carried out .()（  ×  ）

85、【 Judgment questions 】 Between phases or between phases and ground in power system ( For neutral point direct grounding system ) Through a metal conductor 、 The normal state formed by arc or other small impedance connection is called short circuit .（  ×  ）

86、【 Judgment questions 】 In a class of electrical load , When the power supply is interrupted, there will be poisoning, explosion and fire , And loads in particularly important places that are not allowed to interrupt power supply , It is called a particularly important load .()（  √  ）

87、【 Judgment questions 】 The voltage regulation rate is defined as , At a given load power factor ( Usually take 0.8) Secondary no-load voltage U2N And secondary load voltage U2 Sum and secondary rated voltage U2N than .（  ×  ）

88、【 Judgment questions 】 Line power inspection shall be carried out phase by phase .（  √  ）

89、【 Judgment questions 】 Only when all work of the same power failure system is completed , All work tickets are terminated and withdrawn , Remove all grounding wires 、 Temporary barriers and signboards , Restore the permanent barrier and obtain the permission and order of the operation on duty dispatcher , Before switching on and power transmission .（  √  ）

90、【 Judgment questions 】 The grounding resistance of repeated grounding shall be less than 4Ω.（  ×  ）

91、【 Judgment questions 】 In case of fire in indoor electrical devices or equipment, pull off the switch and cut off the power supply as soon as possible , And timely and correctly select fire extinguishers to put out the fire .（  √  ）

92、【 Judgment questions 】 Insulating boots ( shoes ) Put it in the cabinet , And shall be placed separately from other tools .（  √  ）

93、【 Judgment questions 】 Two phase incomplete star connection is widely used to realize phase to phase short circuit protection in power system with indirect neutral grounding .（  √  ）

94、【 Judgment questions 】 The return current of the current relay is divided by the operating current , It is called the return coefficient of current relay .（  √  ）

95、【 Judgment questions 】 35~110kV Overhead lines , If the lightning conductor is not erected along the whole line , It should be in the substation 1~2km Install lightning protection wire in the incoming section of .（  √  ）

96、【 Judgment questions 】 The operation ticket shall be numbered , If it has been operated, it shall be indicated that “ Has been carried out ” The storage period should not be less than 6 Months .（  √  ）

97、【 Judgment questions 】 The induced electromotive force generated by the current change of the coil itself is called self induced electromotive force .（  √  ）

98、【 Judgment questions 】 High breaking capacity high-voltage fuse has the advantage of strong ability to break short-circuit current .（  √  ）

99、【 Judgment questions 】 Overcurrent protection is the main protection of transformer .（  ×  ）

100、【 Judgment questions 】 The heater of the spring energy storage operating mechanism is only used during the maintenance of the circuit breaker .（  ×  ）

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