Operation of simulated examination platform for welder (primary) test questions in 2022

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

2022 Annual welder （ primary ） The title of the work permit is welder （ primary ） The national question bank will deposit secret papers before the examination ！2022 Annual welder （ primary ） Test questions simulation test platform operation according to the welder （ primary ） Pre examination questions . Welder （ primary ） All the examination question banks have passed the safety production simulation examination and verified the learning results in advance .

1、【 Single topic selection 】() The forces on both sides are basically equal or unequal , The unsymmetrical stress direction serves as the support point at the turning point of the line .（  C  ）

A、 Tension bar

B、 Branching rod

C、 Corner bar

D、T Extension rod

2、【 Single topic selection 】() It is often another feature that distinguishes fusion welding methods .（  D  ）

A、 Protection conditions

B、 Operation method

C、 Weld form

D、 Form of protection

3、【 Single topic selection 】() You can get the real shape of the object , And the drawing method is also relatively simple , It has become the basic principle and method of mechanical drawing .（  C  ）

A、 Central projection method

B、 Vertical projection method

C、 Orthographic projection method

D、 Three view method

4、【 Single topic selection 】() It is represented by weld size symbol .（  A  ）

A、 Characteristic dimensions of groove and weld

B、 Root gap dimension

C、 Blunt edge

D、 Welding method

5、【 Single topic selection 】 The projection law of three views is () Equal width .（  D  ）

A、 Front view and left view

B、 Front view and top view

C、 Front view and right view

D、 Top view and left view

6、【 Single topic selection 】 The following () It does not belong to low temperature steel .（  D  ）

A、16Mn

B、09Mn2V

C、16MnCu

D、15Cr1MoV

7、【 Single topic selection 】 The following statement is not true .（  D  ）

A、 Before cutting, the oil stain on the surface of the weldment shall be removed 、 Clean up rust and other dirt

B、 When you start cutting , Preheat the edge of the steel plate first , When the edge appears red and bright , Move the flame partially out of the edge line , At the same time, open the cutting oxygen valve for a long time

C、 During gas cutting , Hold the cutting torch handle with your right hand , The left thumb and index finger are used to control the valve door of preheating oxygen , It is convenient to adjust the preheating flame and cut off the preheating oxygen in time when tempering

D、 When tempering, the acetylene valve must be closed immediately , Cut off acetylene in time , Prevent acetylene from flowing back into acetylene pipe

8、【 Single topic selection 】 To reduce the between weldment and electrode (), Before welding, the surface of weldment and electrode must be carefully cleaned .（  C  ）

A、 Contact voltage

B、 Contact current

C、 Contact resistance

D、 Contact capacitance

9、【 Single topic selection 】 AC through It can be converted to DC .（  A  ）

A、 rectification

B、 resistance

C、 inductance

D、 capacitance

10、【 Single topic selection 】 The grounding resistance of protective grounding is generally less than （）.（  B  ）

A、0.4Ω

B、4Ω

C、6Ω

D、8Ω

11、【 Single topic selection 】 For rooms with high waterproof requirements , A waterproof layer shall be set between the floor and the surface course , And the waterproof layer shall be thrown up along the periphery for at least ( )mm.（  B  ）

A、100

B、150

C、200

D、250

12、【 Single topic selection 】 The first-class enterprise specialized in contracting foundation engineering can undertake ( ).（  A  ）

A、 Construction of various foundation works

B、 Height 100m And the following industries 、 Civil construction works and height 120m Foundation works of and below structures

C、 The depth of excavation shall not exceed 15m Foundation pit maintenance works

D、 The single pile bears the design load 3000kN Pile foundation works at and below

13、【 Single topic selection 】 At the center of the cube and 8 The lattice type with one atom at each vertex is ().（  B  ）

A、 Face centered cubic lattice

B、 Body centered cubic lattice

C、 Close packed hexagonal lattice

D、 None of the above

14、【 Single topic selection 】 The correct construction process of brick masonry is ( ).（  B  ）

A、 Leveling 、 Setting out 、 Lay bricks 、 Disc angle 、 Stand up and count the poles 、 masonry 、 Pointing 、 clear 、 Floor elevation control 、 Floor axis indexing, etc

B、 Leveling 、 Setting out 、 Lay bricks 、 Stand up and count the poles 、 Disc angle 、 masonry 、 clear 、 Pointing 、 Floor axis indexing 、 Floor elevation control, etc

C、 Leveling 、 Setting out 、 Lay bricks 、 Stand up and count the poles 、 Disc angle 、 masonry 、 Pointing 、 clear , Floor axis indexing 、 Floor elevation control, etc

D、 Leveling 、 Setting out 、 Stand up and count the poles 、 Lay bricks 、 Disc angle 、 Hang up 、 masonry 、 Pointing 、 clear 、 Floor elevation control 、 Floor axis indexing, etc

15、【 Single topic selection 】 What are the requirements for welding electrode arc welding power supply ： With no-load voltage , External characteristics with steep drop , It has good dynamic characteristics , Have good ().（  D  ）

A、 Good arc stability

B、 Proper current

C、 Good droplet transfer

D、 Regulation characteristics

16、【 Single topic selection 】 The budget cost is ( ).（  A  ）

A、 Also known as project contracting cost , After adding the expected profit of the project enterprise , It is the target value of the responsibility cost of the project manager

B、 It refers to the sum of various expenses consumed in the construction process to form or contribute to the formation of Engineering entities

C、 The sum of the actual production costs of the contracted project undertaken by the construction project

D、 The project manager's cost after deducting the expected cost reduction from the contract cost

17、【 Single topic selection 】 Heat the weldment slowly and evenly to a certain temperature , Then keep it warm for a period of time , Finally, it is cooled with the furnace or to 300～400℃ After being discharged from the furnace and cooled in air, it is called ().（  A  ）

A、 Stress relief annealing

B、 Medium temperature tempering

C、 Low temperature tempering

D、 Quenching and tempering

18、【 Single topic selection 】 The deformation of the steering tie rod exceeds ()mm when , Cold pressing correction and repair shall be carried out .（  B  ）

A、1

B、2

C、3

D、4

19、【 Single topic selection 】 The main factors affecting the width of cold work hardening zone are ： Mechanical properties of steel ;(); The sharpness of the scissors ; The gap between the upper and lower scissors ; Diagonal angle of upper scissors .（  B  ）

A、 The width of the steel

B、 Thickness of steel

C、 Thermal expansion of steel

D、 Density of steel

20、【 Single topic selection 】 Install the screw wing water meter , The front of the meter and the valve shall be no less than ( ) Straight pipe section with the diameter of water meter interface .（  D  ）

A、5

B、6

C、7

D、8

21、【 Single topic selection 】 The purpose of quenching is to improve the () And wear resistance .（  A  ）

A、 hardness

B、 Strength

C、 toughness

D、 Rigidity

22、【 Single topic selection 】 The crankshaft timing gear of the engine and the camshaft timing gear shall be in accordance with () assembly .（  C  ）

A、 Interference

B、 The gap

C、 Mark engagement

D、 arbitrarily

23、【 Single topic selection 】 Welding workers should study hard , Study professional knowledge seriously , Attaches great importance to (), Strive to improve the quality of workers .（  A  ）

A、 Post skill training

B、 Interpersonal communication

C、 Improve management quality

D、 Welding quality

24、【 Single topic selection 】 The focus of personal protective measures for welding operation is to do a good job in the construction of welding workplace () And personal protection of welders .（  A  ）

A、 Ventilation and dust removal

B、 Environmental Health

C、 Process flow

D、 Equipment layout

25、【 Single topic selection 】 Four types of documents are used in the quality management system , According to its scope of application, it can be divided into general documents and special documents , Of the following options, those that are generic files are ( ).（  D  ）

A、 Quality objectives

B、 Quality plan

C、 Quality control documents

D、 Quality policy

26、【 Single topic selection 】 Welding is by heating or pressurizing , Or both , And with or without filler material , Make the workpiece reach () A processing method of .（  B  ）

A、 Connect

B、 combination

C、 whole

D、 melt

27、【 Single topic selection 】 Welded joints can be divided into butt joints 、T U-joint 、 Corner joint 、 Lap joint ().（  C  ）

A、 Transverse joint

B、 Longitudinal joint

C、 Termination joint

D、 Circumferential joint

28、【 Single topic selection 】 Welded joints are () The most basic element of .（  A  ）

A、 welded structure

B、 welding

C、 Welding production

D、 product

29、【 Single topic selection 】 Shear bracing is a component that limits the deformation of scaffold frame , Mainly bear ( ).（  A  ）

A、 pull

B、 pressure

C、 Shear force

D、 Bending force

30、【 Single topic selection 】 Melting pole CO2 Gas shielded welding , Flat position of carbon steel medium plate T When welding type joints , choose ￠1.2mm Flux cored wire , The selection range of welding current is generally ().（  D  ）

A、120～160A

B、140～180A

C、180～220A

D、200～240A

31、【 Single topic selection 】 Hardness is the measurement of metal materials () The ability of .（  B  ）

A、 Internal deformation

B、 Surface deformation

C、 Overall deformation

D、 Local deformation

32、【 Single topic selection 】 In the circuit , The circuit composed of two or more electrical appliances connected in turn is called ().（  A  ）

A、 A series circuit

B、 Parallel circuit

C、 Complex circuits

D、 Internal circuit

33、【 Single topic selection 】 Pure iron belongs to at room temperature ().（  B  ）

A、 Face centered cubic lattice

B、 Body centered cubic lattice

C、 Close packed hexagonal lattice

D、 None of the above

34、【 Single topic selection 】 Mortar strength grade M5.0 in ,5.0 Express ( ).（  A  ）

A、 The average compressive strength is greater than 5.0MPa

B、 The average compressive strength is less than 5.0MPa

C、 The average value of flexural strength is greater than 5.0MPa

D、 The average value of flexural strength is less than 5.0MPa

35、【 Single topic selection 】 The hydrostatic test pressure of cast iron drainage pipe is ( ).（  C  ）

A、1.45MPa

B、1.46MPa

C、1.47MPa

D、1.48MPa

36、【 Single topic selection 】 Professional ethics is the requirement of social morality () And professional relationship .（  C  ）

A、 Production behavior

B、 Economic behavior

C、 Professional behavior

D、 Social behavior

37、【 Single topic selection 】 The nominal size of sintered ordinary brick is ( ).（  A  ）

A、150mmX115mmX53mm

B、240mmX150mmX115mm

C、240mmX115mmX115mm

D、150mmX53mmX53mm

38、【 Single topic selection 】 Supplementary factors refer to the factors that affect the welding joint () Welding process factors .（  C  ）

A、 Tensile strength

B、 Bending properties

C、 Impact toughness

D、 hardness

39、【 Single topic selection 】 Construction quality accident , It refers to that the construction quality does not meet the regulations ( ) Or design requirements .（  B  ）

A、 Acceptance criteria

B、 Quality standards

C、 Specification requirements

D、 Schedule requirements

40、【 Single topic selection 】 When checking the vacuum degree of engine intake pipe , The vacuum gauge should be connected to ().（  C  ）

A、 On the air cleaner

B、 In front of the throttle

C、 Behind the throttle

D、 On the cylinder

41、【 Single topic selection 】 In the dimensions of the assembly drawing , There is no need to mark ().（  B  ）

A、 Fit dimensions

B、 All dimensions of all parts

C、 Dimensions

D、 Selected dimensions in the design

42、【 Single topic selection 】 The performance of metal under the action of external force is called ().（  C  ）

A、 Chemical properties

B、 physical property

C、 Mechanical properties

D、 Welding properties

43、【 Single topic selection 】 The basic principle of steel rectification is to make the material produce (), Make the fiber length of the material consistent , So as to achieve the purpose of correction .（  D  ）

A、 Not deformed

B、 Small deformation

C、 Large deformation

D、 New deformation

44、【 Single topic selection 】 There are two preheating methods for flash butt welding: resistance preheating and ().（  C  ）

A、 Flame preheating

B、 Infrared preheating

C、 Flash preheating

D、 High frequency preheating

45、【 Single topic selection 】 Before cable laying, it shall be based on the general layout of the cable , According to the actual construction ( ), And plan the cable according to the actual length , Avoid waste .（  C  ）

A、 Manually drag and drop cables

B、 Adopt cable conveyor , Reduce labor intensity

C、 Draw the cable arrangement diagram

D、 In order

46、【 Single topic selection 】 Due to the progress, the light lamp shall be installed first , How to prevent pollution ( ).（  B  ）

A、 Tell construction , Let it work carefully

B、 Before civil engineering shotcreting, it shall be covered with plastic film

C、 Remove it

D、 Pollution cannot be prevented

47、【 Single topic selection 】 according to 《 Classification and catalogue of occupational diseases 》, Which of the following are occupational diseases .( )（  A  ）

A、 silicosis

B、 Catch a cold

C、 Have a fever

D、 cough

48、【 Single topic selection 】 As the cutting speed increases （  B  ）

A、 The groove depth is reduced , Width increase

B、 Groove depth 、 The width will be reduced

C、 The groove depth increases , Reduce the width

D、 Groove depth 、 The width will increase

49、【 Single topic selection 】PVC The construction process flow of wallpaper mounting is ( ).（  C  ）

A、 Grass roots treatment → Snap line → Pre assembly → Closed primer → Avenue → cut paper 、 Number → Moisten paper → Brush glue → Wall mounted → Finish the surface → Maintenance

B、 Grass roots treatment → Snap line → Pre assembly → cut paper 、 Number → Moisten paper → Brush glue → One layer of sealing primer → Wall mounted → Finish the surface → Maintenance

C、 Grass roots treatment → One layer of sealing primer → Snap line → Pre assembly → cut paper 、 Number → Moisten paper → Brush glue → Wall mounted → Finish the surface → Maintenance

D、 Snap line → Grass roots treatment → Pre assembly → cut paper 、 Number → Brush glue → Moisten paper → One layer of sealing primer → Wall mounted → Finish the surface → Maintenance

50、【 Single topic selection 】 Encoded as C2 The construction data of ( ) Information ., Ann Pass the whole production simulation exam at one point ,（  B  ）

A、 Construction Management

B、 construction technique

C、 Construction materials

D、 Schedule cost

51、【 Multiple choice 】 The following are common engineering quality problems ( ).（  ABCDE  ）

A、 Honeycomb appears in cast-in-place reinforced concrete works 、 Leprosy 、 Exposed tendon

B、 mortar 、 Lax control of concrete mix proportion 、 The strength of the test block is unqualified

C、 The compactness of subgrade fails to reach the standard value

D、 The spacing of stirrups for reinforcement installation is inconsistent

E、 The bridge deck expansion device is arranged unevenly

52、【 Multiple choice 】 The butt laying of scaffold board shall meet the following requirements ( ).（  ABC  ）

A、 Two transverse horizontal bars must be set at the joint

B、 The plate head extends out 130-150mm

C、 The sum of the extension of the two plate heads ﹤300mm

D、 The sum of the two outstretched plates ﹥300mm

53、【 Multiple choice 】 There are many ways to classify construction quality accidents , Can press ( ) To divide, etc .（  ABCD  ）

A、 The severity of the damage caused

B、 Cause and location of occurrence

C、 The consequences are variable

D、 Its accident liability is changeable

E、 Project location

54、【 Single topic selection 】 In the star connection of three-phase power supply winding , Those that do not lead out the center line are called ( ).（  A  ）

A、 Three phase three wire system

B、 Three phase four wire system

C、 Three phase five wire system

D、 Undetermined

55、【 Multiple choice 】 The main settlement methods of project price in China include ( ).（  ACDE  ）

A、 Monthly settlement

B、 Annual settlement

C、 Sectional settlement

D、 One time settlement after completion

E、 Target settlement

56、【 Single topic selection 】 The extension of longitudinal horizontal bar shall adopt ( ) Fastener connection or lap .（  C  ）

A、 rotate

B、 Right angle

C、 docking

57、【 Multiple choice 】 The following statements about hot rolled steel bar joints are correct ( ).（  ACD  ）

A、 The reinforcement joint should be welded or mechanically connected

B、 Resistance spot welding shall be preferred for welded joints

C、 When the diameter of reinforcement in ordinary concrete is equal to or less than 22mm when , When there are no welding conditions , Binding connection can be adopted , However, the main reinforcement in the tension member shall not be connected by binding

D、 Resistance spot welding should be adopted for cross spot welding of reinforcement framework and reinforcement mesh

E、 Reinforcement and steel plate T Shape connection , Electroslag pressure welding should be adopted

58、【 Multiple choice 】 The material of radiator assembly has ( ).（  ABCD  ）

A、 Yes, silk

B、 Drum gasket

C、 Plug

D、 Bushing

E、 Reverse wire

59、【 Multiple choice 】 The main causes of construction surplus materials are ( ).（  ABE  ）

A、 Due to the design change of the construction unit , Resulting in surplus backlog of materials

B、 Due to the change of the construction scheme of the construction unit , Resulting in excess backlog of materials

C、 Due to the materials saved by the construction unit in the construction process

D、 Due to the intervention of the supervision unit

E、 Due to the construction unit's material preparation plan or on-site material issuance control , Resulting in the generation of surplus materials

60、【 Multiple choice 】 What is correct in the following statement is ( ).（  CD  ）

A、 The function of doors in buildings is mainly normal passage and safe evacuation , But it has no decorative effect

B、 The minimum width of the door shall be able to meet the relative passage of two people

C、 Most room doors should be... Wide 900～1000mm

D、 When the width of the door opening is large , Double or multiple doors can be used

E、 The height of the door opening is generally 1000mm above

61、【 Multiple choice 】 Among the following measures , Belong to · Ann whole Pass the production simulation exam at one point · Among the safety production guarantee measures of production and business operation entities, the management guarantee measures include ( ).（  BCDE  ）

A、 For the new process 、 New technology 、 Management of new materials or new equipment

B、 Management of main principals and safety production management personnel

C、 Production and operation items 、 Coordination and management of the site

D、 Management of special operation personnel

E、 Production and operation items 、 place 、 Transfer management of equipment

62、【 Single topic selection 】 In the structure of single bucket excavator , It is composed of a rotary platform and a rotary mechanism ( ).（  C  ）

A、 The engine

B、 Working device

C、 Slewing device

D、 Walking gear

63、【 Multiple choice 】 In the following description of the graphic content of the architectural plan , The wrong is ( ).（  AD  ）

A、 The number of positioning axis should be marked at the bottom and right of the drawing , Horizontal numbering shall be in Arabic numerals , Write... From left to right , Vertical numbering shall be in Latin capital letters , Write... From top to bottom

B、 For the contents hidden or above the section plane , Shall be indicated by dashed lines

C、 The external dimensions on the building plan are marked with three dimensions in the horizontal direction and vertical direction respectively

D、 The elevation marked on the plan shall be absolute

E、 The general contents of the roof plan include : parapet 、 Eaves gutter 、 Roof slope 、 Dividing line and outfall 、 Deformation joint 、 stair case 、 Water tank room 、 skylight 、 Upper manhole 、 Fire ladders and other structures 、 Index symbols, etc

64、【 Multiple choice 】 The following items , The main technical property indexes of general cement are ( ).（  ABDE  ）

A、 fineness

B、 Setting time

C、 Cohesion

D、 Volume stability

E、 Hydration heat

65、【 Multiple choice 】 The following regulations belong to the construction law . Safety student Production simulation The test A little . The law is ( ).（  ABC  ）

A、《 Construction Law of the people's Republic of China 》

B、《 Bidding Law of the people's Republic of China 》

C、《 Urban and rural planning law of the people's Republic of China 》

D、《 Construction project quality management regulations 》

E、《 Regulations on the administration of safe production of construction projects 》

66、【 Single topic selection 】 When using safe voltage rating in particularly humid places on the construction site, it shall be ( ).（  D  ）

A、48V

B、36V

C、24V

D、12V

67、【 Multiple choice 】 After warehouse inventory , It should be done “ Sanqing ”, Namely ( ).（  BCD  ）

A、 The number is clear

B、 Account statement clearing

C、 The quantity is clear

D、 Quality clearance

E、 The kind is clear

68、【 Judgment questions 】 The upper part of the pole should always be higher than the operating floor 1500mm.（  √  ）

69、【 Judgment questions 】() Generally, the resistance of insulating materials is above megohm , Therefore, the unit of megohm scale is expressed in kiloohm .（  ×  ）

70、【 Judgment questions 】 The special operation personnel of the production and business operation entities must receive the safety operation training organized by the production and business operation entities in accordance with the relevant provisions of the state , Before starting work .（  ×  ）

71、【 Judgment questions 】() The purpose of stator series resistance starting of three-phase asynchronous motor is to reduce the starting current .（  √  ）

72、【 Judgment questions 】() When using blowtorch , Just open the oil inlet valve , Just light the blowtorch with a match .（  ×  ）

73、【 Judgment questions 】 The project refers to the goal of meeting the specified requirements , According to the time limit 、 Limited resources, limited quality standards and other constraints , A specific process consisting of a series of coordinated controlled activities .（  √  ）

74、【 Judgment questions 】() The driving and driven bevel gears of the main reducer can be assembled in pairs .（  ×  ）

75、【 Judgment questions 】() Excessive cylinder wear will cause diesel engine to move ‘ Safety production simulation exam A little ‘ Lack of strength .（  √  ）

76、【 Judgment questions 】() Scribing refers to according to the requirements of drawings and real objects , On the blank or semi-finished product and on the processed material , Draw the processing boundary 、 The process of processing graphics .（  √  ）

77、【 Judgment questions 】() To be fair, we should always take the country 、 The interests of the people are the highest principle , Take the interests of the socialist cause as the highest principle , not swayed by personal considerations , Not for personal gain , Defend the country 、 The interests of the people .（  √  ）

78、【 Judgment questions 】() Double line drawing is a projection drawing showing only the outer contour of pipes and fittings .（  √  ）

79、【 Judgment questions 】() An alloy is a substance composed of two or more elements .（  ×  ）

80、【 Judgment questions 】() Doubling the length of a conductor , The area has also doubled , Then the resistance of the conductor increases 4 times .（  ×  ）

81、【 Judgment questions 】 The corrosion resistance of steel structure is good 、 High strength 、 The structure is self significant .（  ×  ）

82、【 Judgment questions 】 The indoor power distribution shall adopt porcelain bottle according to the wiring type 、 Porcelain （ plastic ） clip 、 Embedded insulation slot ” Safety student The production simulation test is a little through ”、 Laying through pipes or steel cables .（  √  ）

83、【 Judgment questions 】 The selection of conductor section is mainly based on the calculation results of line load , Other aspects may not be considered .（  ×  ）

84、【 Judgment questions 】 Serious defects refer to defects that have a decisive impact on the mechanical performance or installation and use performance of structural members .（  √  ）

85、【 Judgment questions 】() Standard spot welding electrodes are used for single point projection welding . In order to reduce the indentation on the workpiece surface , The diameter of electrode contact surface shall not be less than twice the diameter of bump .（  √  ）

86、【 Judgment questions 】 The enterprise qualification of a construction enterprise is grade II , The first level qualification evaluation will be completed in the near future , In order to be able to contract the construction area under bidding 20 ten thousand m2 Residential area construction project , Party a borrowed the qualification certificate from the cooperative first-class construction enterprise to complete the bidding of the construction project , After winning the bid, enterprise a obtains the qualification of first-class construction enterprise , Then the bid winning of the project by enterprise a is effective .（  ×  ）

87、【 Judgment questions 】 The removal of scaffold must be carried out layer by layer from top to bottom , It is forbidden to work up and down at the same time .（  √  ）

88、【 Judgment questions 】 Compared with sawn timber , The disadvantage of wood-based panel is : The adhesive layer will age , Poor long-term bearing capacity , The service life is much shorter than that of sawn timber , There is certain inorganic pollution .（  ×  ）

89、【 Judgment questions 】() Normalizing refers to heating steel to A3 or Acm above 50～70℃, After heat preservation , Heat treatment method of cooling in still air .（  √  ）

90、【 Judgment questions 】() Welding practitioners only need to do their own work , Don't care about other .（  ×  ）

91、【 Judgment questions 】() Welding practitioners should seriously study professional knowledge , Pay attention to post skill training .（  √  ）

92、【 Judgment questions 】 Cold drawn reinforcement , Be sure to butt weld first and then cold draw , otherwise , Will lose the cold strength .（  √  ）

93、【 Judgment questions 】 Before the construction of the construction project , The construction personnel in charge of the project management of the construction unit shall report the technical requirements related to safe construction to the construction operation team 、 The operator gives a detailed description , And signed by both parties for confirmation .（  √  ）

94、【 Judgment questions 】() When welding , Eccentric welding rods shall not be used as far as possible .（  √  ）

95、【 Judgment questions 】() The external defect of weld refers to the deviation of Weld Geometry .（  ×  ）

96、【 Judgment questions 】() The voltage stabilizing diode voltage stabilizing circuit is to connect the voltage stabilizing tube with the load in parallel .（  √  ）

97、【 Judgment questions 】() Professional ethics is the concrete embodiment of social moral requirements in economic behavior and social relations .（  ×  ）

98、【 Judgment questions 】 One of the important contents of welder's professional code is in the production process , The welder's process documents shall be strictly implemented , To guarantee the quality of products .（  √  ）

99、【 Judgment questions 】 Magnetic bias blowing is directly related to the current , In order to reduce magnetic bias blowing , The welding current can be appropriately reduced .（  √  ）

100、【 Judgment questions 】 The AC current through the human body should be less than 50mA, People must be safe ()（  ×  ）

Support accurate welding in all regions of the country （ primary ） Examination questions , Support safety certificate , Special operation certificate , Exercises on the question bank of vocational skill appraisal and other types of work .