2022 low voltage electrician test questions and online simulation test

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

2022 The low-voltage electrician retraining question bank in is covered by high-frequency examination questions in the low-voltage electrician examination paper ！2022 Low voltage electrician test questions and online simulation test are based on the new low voltage electrician test outline . Low voltage electrician test simulation questions can be checked at any time according to the safety production simulation test .

1、【 Single topic selection 】

The symbol of ammeter is ().

（  B  ）

A、Ω

B、A

C、V

2、【 Single topic selection 】 a 380 v 7.5 Kilowatt motor , Install overload and open phase protection , be a candidate for election ( ).（  C  ）

A、J6-20/3

B、J6-60/3D

C、J6-20/3D

3、【 Single topic selection 】 In order to avoid direct lightning strike on high-voltage power transformation and distribution station , Cause a large-scale blackout , Generally, it can be used ( ) Lightning protection .（  A  ）

A、 Lightning rod

B、 Valve arrester

C、 Lightning receiving network

4、【 Single topic selection 】 Emergency lighting is generally adopted ( ).（  B  ）

A、 Fluorescent lamp

B、 Incandescent lamp

C、 High pressure mercury lamp

5、【 Single topic selection 】 When human body directly contacts one phase of live equipment or line , Electric current flows into the earth through the human body , This phenomenon of electric shock is called ( ) Get an electric shock .（  A  ）

A、 single-phase

B、 two-phase

C、 three-phase

6、【 Single topic selection 】 In the power distribution system of civil buildings , It is generally used ( ) Circuit breaker .（  C  ）

A、 Frame type

B、 Electric

C、 Leakage protection

7、【 Single topic selection 】 In thunderstorm weather , Doors, windows, etc. should be closed , The purpose is to prevent ( ) Break into the house , Cause fire 、 Explosion or casualties .（  A  ）

A、 Spherical thunder

B、 Induction mine

C、 Direct ray

8、【 Single topic selection 】 Pictured , Insert a... At the fuse “220V40W” The light bulb L0, When only closed S1 when L0 and L1 All dark red ; From this we can determine （）.

（  A  ）

A、L1 The branch wiring is correct

B、L1 The lamp cap is short circuited

C、L1 There is leakage in the branch

9、【 Single topic selection 】 When 10kV In case of electrical fire in the high voltage control system , If the power cannot be cut off , If it is necessary to put out the fire with electricity, the optional fire extinguisher is ( ).（  A  ）

A、 Dry powder fire extinguisher , The distance between the nozzle and the body and the charged body shall not be less than 0.4m

B、 Atomizing water gun , Wear insulating gloves , Wear insulating boots , The water gun head is grounded . The distance between the water gun head and the charged body 4.5m above

C、 Carbon dioxide fire extinguisher , The distance between the nozzle and the charged body shall not be less than 0.6m

10、【 Single topic selection 】 When the voltage is 5V when , The resistance value of the conductor is 5 o , Then when the voltage across the resistor is 2V when , The resistance value of the conductor is ( ) o .（  B  ）

A、10

B、5

C、2

11、【 Single topic selection 】 When replacing and overhauling electrical equipment , The best safety measure is ( ).（  A  ）

A、 Cut off the power supply

B、 Standing on a stool

C、 Wear rubber gloves to operate

12、【 Single topic selection 】 On each single-phase circuit in the lighting system , The number of lamps and sockets should not exceed ( ) individual .（  B  ）

A、20

B、25

C、30

13、【 Single topic selection 】 Main person in charge or person in charge of non coal mining enterprises 、 Chief technical officer () Organize at least one comprehensive 、 Safety inspection with hidden danger investigation as the main content . All kinds of hidden dangers found shall be registered , And earnestly take rectification measures 、 responsibility 、 Money 、 Time limit and plan V implementation .（  C  ）

A、 Every year,

B、 Quarterly

C、 monthly

14、【 Single topic selection 】 When measuring resistance with a multimeter , The black probe is connected to the power supply in the meter ( ).（  C  ）

A、 Two poles

B、 Negative pole

C、 Positive pole

15、【 Single topic selection 】 When checking the capacitor with a multimeter, the pointer should swing and then ( ).（  B  ）

A、 Keep still

B、 Gradually swing back

C、 Swing back and forth

16、【 Single topic selection 】 Capacitors belong to ( ) equipment .（  C  ）

A、 dangerous

B、 motion

C、 static

17、【 Single topic selection 】 The synthetic methods of polymer compounds include chain addition polymerization and () There are two main types of polymerization .（  C  ）

A、 cation

B、 anion

C、 Step by step

18、【 Single topic selection 】 What is the explosion limit of coke oven gas ( ).（  C  ）

A、46-68%;

B、12.5-75%;

C、6-30%.

19、【 Single topic selection 】 The unit of power of a capacitor is ( ).（  A  ）

A、 Lack

B、 watts

C、 volt-ampere

20、【 Single topic selection 】 When working in gas areas , The concentration of carbon monoxide exceeds ( ) You must wear a mask when working （  A  ）

A、160PPm

B、100PPm

C、50PPm

21、【 Single topic selection 】 《 Regulations on labor protection in workplaces where toxic substances are used 》 Regulations , Warning signs shall be set up at workplaces where toxic substances are used 、 Chinese warning instructions and ().（  A  ）

A、 Yellow area warning line

B、 Red area warning line

C、 Yellow warning signs

22、【 Single topic selection 】 Steel wire pliers with plastic sleeve handle used by electricians , Its withstand voltage is ( )V above .（  B  ）

A、380

B、500

C、1000

23、【 Single topic selection 】 basis 《 Administrative licensing law 》, The administrative organ shall, within the scope of its statutory functions and powers , According to the law 、 Administrative regulations 、 Rules and regulations , Can be entrusted () Implement administrative license .（  C  ）

A、 enterprises and institutions

B、 Other state organs

C、 Other administrative organs

24、【 Single topic selection 】 according to 《 Industrial injury insurance regulations 》 The provisions of the , Payment of work-related injury insurance premium , The following is true :().（  A  ）

A、 Paid by the employer , Individual employees do not pay

B、 According to the country 、 The principle of collective and individual tripartite burden , By state , The employer and the individual employee shall pay

C、 The state undertakes the main part , Employers take second place , Once again, the individual

25、【 Single topic selection 】 The following belong to the production plant VOC The main reason for the spread is ().（  C  ）

A、 Materials are volatile

B、 The ditch is not tightly sealed

C、 Equipment leaks

26、【 Single topic selection 】 The declaration of occupational hazards is based on the coal mine , Declare once a year , The coal mining enterprise shall be established every year ( ) Complete the declaration of the previous year before .（  A  ）

A、3 month 31 Japan

B、1 month 31 Japan

C、2 month 28 Japan

27、【 Single topic selection 】 In dealing with coal seam roof caving accident, there must be ( ) Check and monitor the condition of the top plate .（  C  ）

A、 Tile inspector

B、 Shooter

C、 Specially assigned person

28、【 Single topic selection 】 The harm caused by the thermal effect of electric current on human body is ( ).（  A  ）

A、 Electric burn

B、 Electric branding

C、 Skin metallization

29、【 Single topic selection 】 Density of nitrobenzene and benzene 、 And the density of water ( ).（  B  ）

A、 Higher density than benzene

B、 More dense than water

C、 In between

30、【 Single topic selection 】 An electric energy meter measures ( ) Instruments used .（  C  ）

A、 electric current

B、 voltage

C、 electric energy

31、【 Single topic selection 】 Before climbing the pole , The ankles shall be ( ).（  B  ）

A、 Human static load test

B、 Human load impact test

C、 Human load tensile test

32、【 Single topic selection 】 Iodine tungsten lamp belongs to ( ) The light source .（  C  ）

A、 Gas discharge

B、 electric arc

C、 Thermal radiation

33、【 Single topic selection 】 The normal working state of the zener diode is ( ).（  C  ）

A、 On state

B、 As of

C、 Reverse breakdown state

34、【 Single topic selection 】《 Coal mine safety quality standardization 》 Regulations ： The single hydraulic prop of the coal face shall be in a straight line , The deviation shall not exceed ( )mm.（  B  ）

A、±50

B、±100

C、±200

35、【 Single topic selection 】《 Regulations on reporting, investigation and handling of production safety accidents 》 Regulations , When technical appraisal is required in accident investigation , Should be () Entrust a unit with the qualification specified by the state to carry out .（  B  ）

A、 Accident unit

B、 The accident investigation team

C、 The people's Government of the place where the accident occurred

36、【 Single topic selection 】 Brain cells are most sensitive to hypoxia , Generally, hypoxia exceeds ( )min It will cause irreversible damage and brain death .（  B  ）

A、5

B、8

C、12

37、【 Single topic selection 】 Lightning rod is a common lightning protection device , When installing , Independent grounding device should be set for lightning rod , If in non high resistivity areas , The grounding resistance should not exceed ( )Ω.（  C  ）

A、2

B、4

C、10

38、【 Single topic selection 】 The height of class II work at heights refers to ( ).（  A  ）

A、5-15m

B、2-5m

C、15-30m

39、【 Single topic selection 】 According to the viewpoint of modern system safety engineering , Work safety is to make the production process conform to material conditions and work order , Activities to prevent personal injury and property loss , The main objective of work safety is to protect personnel in the system from accidents () The damage of .（  A  ）

A、 accident

B、 Harmful factors

C、 An accident

40、【 Single topic selection 】 Liquefied petroleum gas cylinders belong to ().（  B  ）

A、 High pressure gas cylinder

B、 Low pressure gas cylinder

C、 Normal temperature gas cylinder

41、【 Single topic selection 】 The foaming multiple is () Double medium foam extinguishing system .（  B  ）

A、10-100

B、20-200

C、30-200

42、【 Single topic selection 】 The valve code of the steam trap is ().（  C  ）

A、J

B、Y

C、S

43、【 Single topic selection 】 The team combines the actual production of the post ,() organization ' Ann whole Production simulation test 1 Diantong ' The team carries out the disposal plan drill , Continuously improve the emergency response of team workers 、 Emergency rescue capability .（  C  ）

A、 At any time

B、 Irregular

C、 regular

44、【 Single topic selection 】 Gas accumulation means that the volume exceeds 0.5m³ The gas concentration in the space reaches ( )％ The phenomenon of .（  C  ）

A、1

B、1.5

C、2

45、【 Single topic selection 】 according to 《 Classification of hazard degree of productive dust operation 》(GB5817—1986), The classification index for the hazard degree of productive dust does not include ().（  B  ）

A、 Content of free silica in dust

B、 Density of dust

C、 Total lung ventilation during worker exposure time

46、【 Single topic selection 】 Application of soldering transistor and other weak current components ( )W It's better to use electric soldering iron .（  A  ）

A、25

B、75

C、100

47、【 Single topic selection 】 Pre evaluation of occupational hazards of construction projects and evaluation of control effect of occupational hazards , It shall be provided by..., who has obtained corresponding qualification according to law ( ) To undertake .（  B  ）

A、 Evaluation organization

B、 Occupational health technical service organization

C、 Occupational health testing institutions

48、【 Single topic selection 】 The spontaneous combustion reaction of ferrous sulfide belongs to ( ).（  B  ）

A、 endothermic

B、 exothermic

C、 polymerization

49、【 Multiple choice 】 There are the following ( ) One of the situations , Belong to “ The ventilation system is not perfect 、 unreliable ”.（  BCD  ）

A、 Parallel ventilation

B、 The ventilation system is not formed according to the formal design , Or the production level and mining area do not realize zoning ventilation

C、 The air volume of main air consumption places such as mining face is insufficient

D、 The mining area enters （ return ） The air tunnel does not run through the whole mining area , Or although it runs through the whole mining area, there is a section of air inlet 、 A section of return air

50、【 Single topic selection 】 The goods loaded by motor vehicles in the plant are too high 、 When it is too wide , Must be approved by the factory () Reviewed and approved by the management department .（  A  ）

A、 Security

B、 Environmental protection

C、 The supervision of the

51、【 Single topic selection 】 according to 《 Regulations on reporting, investigation and handling of production safety accidents 》 Regulations , Serious injury occurred in the enterprise 、 After the fatal accident , After receiving the report, the person in charge of the enterprise shall immediately report to the relevant departments , No later than ( )h.（  C  ）

A、8

B、16

C、1

52、【 Multiple choice 】“ Gas overrun operation ”, It refers to the following ( ) One of the situations .（  BC  ）

A、 Insufficient number of gas inspectors

B、 There is a leak in gas inspection 、 Fake

C、 No measures shall be taken to continue the operation after the underground gas exceeds the limit

D、 Stop the operation after the gas exceeds the limit

53、【 Judgment questions 】 When using the allowable millisecond delay electric detonator in coal mine , The extension of the last paragraph shall not exceed 150ms.（  ×  ）

54、【 Judgment questions 】30Hz~40Hz The current is the most dangerous .（  ×  ）

55、【 Judgment questions 】Ⅱ Class a equipment and Ⅲ Grounding or neutral connection measures shall be taken for such equipment .（  ×  ）

56、【 Judgment questions 】 The object of occupational health is human protection , Not environmental protection .（  √  ）

57、【 Judgment questions 】 In general , The nominal diameter of the pipe is an integer close to the outer diameter of the pipe .（  ×  ）

58、【 Judgment questions 】 Ministry of Public Security of the People's Republic of China " Safety student Production simulation exam One Diantong " The first 61 The order comes from 2002 year 5 month 1 The effective date .（  √  ）

59、【 Judgment questions 】 When measuring resistance with a multimeter , The pointer is most accurate in the middle of the dial .（  √  ）

60、【 Judgment questions 】 Occupational hazard declaration of central enterprises and their subordinate units , Report to the work safety supervision and administration department at the municipal level divided into districts according to the division of responsibilities .（  ×  ）

61、【 Judgment questions 】 In order to fundamentally solve the problem of industrial pollution , It is necessary to adopt less waste and no waste technology, that is, low energy consumption 、 High consumption 、 Pollution free technology .（  ×  ）

62、【 Judgment questions 】 The time required for alternating current to change for one week is called cycle T.（  √  ）

63、【 Judgment questions 】 Enterprises 、 Employees of public institutions engage in special operations without special operation certificate , Operation against regulations .（  √  ）

64、【 Judgment questions 】 Protective neutral connection is applicable to the distribution system with neutral point directly grounded .（  √  ）

65、【 Judgment questions 】 The right-hand rule is to determine the direction of the induced current generated when the straight conductor moves to cut the magnetic line of force .（  √  ）

66、【 Judgment questions 】 Before the coal mine is put into production , Coal mining enterprises shall report to the relevant laws on production safety 、 Obtain a production license in accordance with the provisions of administrative regulations . Failing to obtain a work safety license , It is not allowed to engage in coal production .（  √  ）

67、【 Judgment questions 】 There is no crack in the pressure test of the cold exchange equipment 、 No leakage 、 It is qualified if there is no residual deformation .（  √  ）

68、【 Judgment questions 】 When the chandelier is installed above the table , The vertical distance from the table shall not be less than 1.5m.（  ×  ）

69、【 Judgment questions 】 In places with explosion and fire hazards , Should try to use less or no portable 、 Mobile electrical equipment .（  √  ）

70、【 Judgment questions 】 In order to ensure the reliable operation of computer control system , The operation and use of the system shall be provided with different operation permissions , To avoid misoperation .（  √  ）

71、【 Judgment questions 】 crack , Safety production mold Proposed examination Try a little , The slagging furnace tube is prone to creep 、 Carburizing 、 Crackle 、 Perforation and other damage .（  √  ）

72、【 Judgment questions 】 Shunt capacitors can reduce power consumption ‘ Safety production simulation test Give it a try Diantong ‘ Effect of pressure loss .（  √  ）

73、【 Judgment questions 】 In the catalogue of occupational diseases , Occupational asthma is an occupational disease caused by biological factors .（  ×  ）

74、【 Judgment questions 】 Hand held electric tools can be classified in two ways , That is, it is classified according to working voltage and moisture-proof degree .（  ×  ）

75、【 Judgment questions 】 When lye enters the eyes , Immersion in the cornea can cause vision loss or blindness .（  √  ）

76、【 Judgment questions 】 The text symbol of contactor is FR.（  ×  ）

77、【 Judgment questions 】 according to 《 Administrative licensing law 》 The provisions of the , Cancellation of administrative license and cancellation of administrative license , The same applies .（  ×  ）

78、【 Judgment questions 】 When rotating electrical equipment is on fire, dry powder fire extinguisher should not be used to extinguish the fire .（  √  ）

79、【 Judgment questions 】 Pregnant female employees shall not be arranged , stay 33℃ The operating temperature and indoor temperature in the above high temperature weather are 35℃ Work in the above workplaces .（  ×  ）

80、【 Judgment questions 】 according to 《 Measures for identification of major potential safety hazards in coal mine production ﹙ On a trial basis ﹚》 The rules , Winch for mine hoisting personnel 、 a wire rope 、 Lifting container 、 People, cars, etc. in inclined shafts have not obtained safety marks for coal mining products , It is a major hidden danger of coal mine safety production .（  √  ）

81、【 Judgment questions 】 Thermal relay is a kind of protective appliance that uses bimetallic sheet to bend and push contact action , It is mainly used for line quick break protection .（  ×  ）

82、【 Judgment questions 】 In the safety work regulations of the power industry , Safety technical measures include work ticket system 、 Work permit system 、 Work guardianship system 、 Work interruption transfer and termination system .（  ×  ）

83、【 Judgment questions 】 Hydrogenation reactor before filling catalyst , A certain amount of deionized water should be added first .（  √  ）

84、【 Judgment questions 】 Damming can intercept the leakage in the water .（  √  ）

85、【 Judgment questions 】 Generally, carbon dioxide is used for inert gas replacement 、 Steam and nitrogen .（  √  ）

86、【 Judgment questions 】 Incandescent lamp belongs to thermal radiation light source .（  √  ）

87、【 Judgment questions 】 Sand production of oil layer is related to physical characteristics of oil layer , The sand production time depends on the mining method .（  √  ）

88、【 Judgment questions 】COG The explosion limit is 12.5—74%.（  ×  ）

89、【 Judgment questions 】 phase “ Safety production simulation test Try a little through “ Under the same conditions , Alternating current is more harmful to human body than direct current .（  √  ）

90、【 Judgment questions 】 Generally, the pressure gauge shall be marked with calibration marks , Indicate the next calibration date or calibration validity period . The calibrated pressure gauge shall be sealed with lead .（  √  ）

91、【 Judgment questions 】 The power supply of mobile electrical equipment shall adopt high-strength copper core rubber sheathed hard insulated cable .（  ×  ）

92、【 Judgment questions 】 The same enterprise produces 、 Importing the same kind of hazardous chemicals , Register once according to the manufacturer , However, relevant information on the import of hazardous chemicals shall be submitted .()（  √  ）

93、【 Judgment questions 】 The work safety license needs to be extended upon expiration , The enterprise shall 2 Go through the extension formalities with the original work safety license issuing and administration authority within months .（  ×  ）

94、【 Judgment questions 】 The power supply of mobile electrical equipment is generally erected or protected by steel pipe .（  √  ）

95、【 Judgment questions 】 The heating furnace plant shall adopt organized natural ventilation , Slope houses should be built around the plant .（  ×  ）

96、【 Judgment questions 】 The desk lamp with screw cap shall adopt three hole socket .（  √  ）

97、【 Judgment questions 】 Copper wire and aluminum wire can be directly connected when needed .（  ×  ）

98、【 Judgment questions 】 The lightning protection device shall be laid along the outer wall of the building , And grounded through the shortest way , If there are special requirements, it can be concealed .（  √  ）

99、【 Judgment questions 】 Static electricity is a very common electrical phenomenon , Its harm is not small , Solid static electricity can reach 200kV above , Human static electricity can also reach 10KV above .（  √  ）

100、【 Judgment questions 】 Electricity inspection is one of the technical measures to ensure the safety of electrical operation .（  √  ）

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