2022 welder (primary) new version test questions and welder (primary) free test questions

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

Pass the safety production simulation exam at one point ： Welder （ primary ） The new version of the test questions is generated by the one-point pass of the safety production simulation test , Welder （ primary ） The question bank of the certificate simulation examination is based on the welder （ primary ） The latest edition of the textbook is compiled （ primary ） Simulation test .2022 Annual welder （ primary ） New test questions and welders （ primary ） Free questions

1、【 Single topic selection 】 The minimum cross-section of insulated conductor laid through pipe , Copper wire is ().（  A  ）

A、1

B、1.5

C、2.5

D、4

2、【 Single topic selection 】 Transistor's fα Higher than or equal to () High frequency tube .（  C  ）

A、1MHz

B、2MHz

C、3MHz

D、4MHz

3、【 Single topic selection 】 When electricity flows continuously through a section of conductor with uneven thickness , The current intensity on each cross section of the conductor ().（  C  ）

A、 Directly proportional to the cross-sectional area

B、 Inversely proportional to the cross-sectional area

C、 Independent of the cross-sectional area

D、 With the change of cross-sectional area

4、【 Single topic selection 】 The circuits of ceiling fans and floor fans are generally controlled by switches 、 governor 、() And motor winding .（  C  ）

A、 resistor

B、 Buzzer

C、 Capacitor

D、 Inductor

5、【 Single topic selection 】 The core of electromagnetic measuring instrument , Should be selected () Type of magnetic material .（  B  ）

A、 Soft magnetic

B、 Hard magnetic

C、 Special purpose

D、 Ferrite

6、【 Single topic selection 】 The following materials suitable for manufacturing resistors are ().（  D  ）

A、 gold

B、 silver

C、 aluminum

D、 Constantan

7、【 Single topic selection 】 About the auxiliary contact of the contactor , The following statement is true ().（  B  ）

A、 Not often used

B、 Often connected to the motor control circuit

C、 It is often connected to the main circuit of the motor

D、 It can be connected to the main circuit of the motor

8、【 Single topic selection 】 The power supply of silicon arc welding rectifier consists of three-phase step-down transformer 、()、 Silicon rectifier set 、 Output reactor, etc .（  B  ）

A、 inverter

B、 Saturation reactor

C、 Low voltage rectifier

D、 full-wave rectifier

9、【 Single topic selection 】 GMAW delivers gas through the nozzle , Realize reliable protection of molten pool , exclude () The harmful effects of .（  B  ）

A、 Base metal

B、 air

C、 electric arc

D、 weld line

10、【 Single topic selection 】 The direction of the magnetic field generated by the current carrying coil is determined , It can be bent with four fingers of the right hand, which is consistent with the current direction in the coil , And put your thumb up , The direction it refers to is in the current carrying coil () The direction of .（  B  ）

A、 Current stress

B、 The magnetic field

C、 Flux

D、 induced current

11、【 Single topic selection 】 The physical quantity indicating the conductivity of a substance is ().（  D  ）

A、 inductance

B、 Potential

C、 resistance

D、 Resistivity

12、【 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

13、【 Single topic selection 】 The following statement about the drying of welding rods is incorrect ().（  B  ）

A、 The drying temperature of materials shall be in strict accordance with the provisions of standards and manufacturer's instructions

B、 Electrodes with different drying temperatures can be baked in the same furnace

C、 When the welding rod is dried , It shall not be stacked in stacks or bundles , It shall be laid in layers

D、 The purpose of electrode drying is to remove the moisture in the electrode

14、【 Single topic selection 】 Before scribing , The surface of cast iron and forging blank shall be coated with ().（  A  ）

A、 Lime water

B、 Copper sulfate solution

C、 Blue oil

D、 Sodium carbonate solution

15、【 Single topic selection 】 according to GB/T221—2000 Regulations , In alloy structural steel , The average mass fraction of alloying elements is () when , After the alloy element symbol, it shall be written as 2.（  A  ）

A、1.5%～2.49%

B、1.5%～2.00%

C、2.00%～2.49%

D、2.49%～3.00%

16、【 Single topic selection 】 One of the characteristics of a contract is that the contract is between both parties () Behavior .（  B  ）

A、 agreement

B、 law

C、 cooperation

D、 trust

17、【 Single topic selection 】 Gas metal arc welding , Wire feeding methods include push-pull wire feeding 、 Push wire and ().（  D  ）

A、 One piece

B、 Separate type

C、 Gooseneck

D、 Wire drawing

18、【 Single topic selection 】 In oxygen - During acetylene cutting , Whether the cutting speed is correct or not , Mainly based on To judge .（  C  ）

A、 Combustion state of weld metal

B、 The size of the slit

C、 The amount of dragging after cutting

D、 Cutting spatter

19、【 Single topic selection 】 At present, the pressure reducer often used on oxygen cylinders is QD-1 Type pressure reducer .（  A  ）

A、 Single stage reaction

B、 Two stage reaction

C、 Positive action

D、 Reaction

20、【 Single topic selection 】 A blunt edge is left in the groove to prevent burn through , The size of the blunt edge shall ensure the first layer of weld ().（  B  ）

A、 Incomplete penetration

B、 Can weld through

C、 Not burned through

D、 Can burn through

21、【 Single topic selection 】 The following welding inspection methods belong to non-destructive inspection ().（  D  ）

A、 Hardness test

B、 Impact test

C、 Fatigue test

D、 Radiographic inspection

22、【 Single topic selection 】 The following () It's the disadvantage of flame hot bending .（  A  ）

A、 Temperature control is difficult , Low production efficiency

B、 Labor intensity is high

C、 The thinning of the outer wall thickness of the elbow increases

D、 The friction of the inner wall of the pipe will roughen the inner wall

23、【 Single topic selection 】 Gas metal arc welding , Ozone cannot be reduced during welding 、 The method by which nitrogen oxides and soot harm human respiratory organs is ().（  B  ）

A、 Select high-quality gas

B、 Select low dust welding wire

C、 Ventilation facilities

D、 Improve automation

24、【 Single topic selection 】 In order to prevent hot cracks , Sulfur is required when welding high alloy steel 、 The mass fraction of phosphorus must be limited to ().（  C  ）

A、0.01％ following

B、0.02％ following

C、0.03％ following

D、0.04％ following

25、【 Single topic selection 】 Gas metal arc welding , The diameter of welding wire shall be selected according to the welding position and ().（  B  ）

A、 Material of test piece

B、 Thickness of test piece

C、 Welding current

D、 Welding voltage

26、【 Single topic selection 】 The symbol for tensile strength is ().（  D  ）

A、σs

B、σ0.2

C、σk

D、σb

27、【 Single topic selection 】 Due to the of low carbon steel () Wider , It is easy to obtain the required plastic deformation during spot welding without using a large electrode pressure .（  A  ）

A、 Plastic temperature zone

B、 Crystallization temperature zone

C、 Strain temperature zone

D、 Recrystallization temperature zone

28、【 Single topic selection 】 The letters in the category name of the welding power supply model () Indicates arc welding rectifier .（  D  ）

A、A

B、X

C、B

D、Z

29、【 Single topic selection 】 Gas metal arc welding , The extension length of welding wire is related to the material of welding wire 、 Welding voltage 、 Wire diameter and () of .（  D  ）

A、 Transition form

B、 Nozzle aperture

C、 Gas flow

D、 Welding current

30、【 Single topic selection 】 When stud welding is used to weld aluminum and its alloys , Should use ().（  B  ）

A、 DC positive connection

B、 DC reverse connection

C、 communication

D、 Direct current forward connection or reverse connection

31、【 Single topic selection 】 The workpiece cleaning of resistance butt welding can be used ()、 Mechanical means such as wire brush , Pickling can also be used .（  D  ）

A、 sandpaper

B、 Steel wheel

C、 Brush

D、 Grinding wheel

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

A、 rectification

B、 resistance

C、 inductance

D、 capacitance

33、【 Single topic selection 】 An atom consists of a central nucleus and () Composed of .（  B  ）

A、 The proton

B、 Extranuclear electrons

C、 neutron

D、 ion

34、【 Single topic selection 】 The welding method code of tungsten inert gas welding is ().（  D  ）

A、135

B、111

C、131

D、141

35、【 Single topic selection 】 Resistance welding because the resistance of weldment and welding machine is very small , So the transformer (), Fixed welding machines are usually used in 10 Within volts .（  A  ）

A、 The secondary side voltage is not high

B、 The primary side voltage is not high

C、 It's bigger

D、 Complicated structure

36、【 Single topic selection 】 Before welding, the welder shall conduct safety inspection on the angle grinder used , But you don't have to check .（  C  ）

A、 Is there any leakage

B、 Whether the insulation of the input power line is intact

C、 Internal insulation resistance of angle grinder

D、 Whether the grinding wheel has been fastened firmly

37、【 Single topic selection 】 Weld under other same conditions () The diameter of the electrode used is larger than that of other positions .（  A  ）

A、 Flat fillet weld

B、 Vertical fillet weld

C、 Transverse fillet weld

D、 Elevation weld

38、【 Single topic selection 】 When carbon arc gouging ,(), Prevent hot metal and slag from burning work clothes and scalding skin .（  B  ）

A、 Try to operate against the wind

B、 Try to operate downwind

C、 Try to operate in crosswind

D、 As long as it's not downwind

39、【 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

40、【 Single topic selection 】 During gas welding and gas cutting , Air leakage at the switch or welding nozzle , The main reason is （  C  ）

A、 The welding nozzle is worn

B、 Welding time is too long

C、 The welding gun is blocked

D、 The welding nozzle is not tightened

41、【 Single topic selection 】 When the sheet is spot welded , The strength of the solder joint is the same as () Size matters .（  B  ）

A、 Welding current

B、 Nugget diameter

C、 Electrode size

D、 Welding time

42、【 Single topic selection 】 Angular deformation in welding deformation 、 Bending deformation and () etc. , Under the action of external force, it will cause stress concentration and additional stress , Reduce the bearing capacity of the structure .（  A  ）

A、 Wave deformation

B、 To distort

C、 Shrinkage deformation

D、 Staggered deformation

43、【 Single topic selection 】 When correcting welding deformation with flame correction method , The minimum heating temperature shall not be lower than ().（  A  ）

A、300℃

B、200℃

C、400℃

D、350℃

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

A、C

B、A

C、V

D、F

45、【 Single topic selection 】 There are many alkaline oxides in the coating of alkaline electrode , So deoxidation 、 desulphurization 、 Dephosphorization capacity （  C  ）

A、 Not as good as acid electrode

B、 Equivalent to acid electrode

C、 Stronger than acid electrode

D、 Second only to acid electrodes

46、【 Single topic selection 】 The contract law of the people's Republic of China was promulgated on () year .（  D  ）

A、1994

B、1996

C、1998

D、1999

47、【 Single topic selection 】 Carbon is α- The supersaturated solid solution in iron is called ().（  D  ）

A、 Austenite

B、 Pearlite

C、 Lysatid

D、 Martensite

48、【 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

49、【 Single topic selection 】 The following statement about innovation is incorrect ().（  A  ）

A、 Innovation is irrelevant to personal development

B、 Innovation is the sustainable development of enterprises 、 A huge driving force for healthy development

C、 Innovation is an important means for enterprises to win in competition

D、 Innovation is an important factor in the success of one's career

50、【 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

51、【 Single topic selection 】 Pipe butt welding is widely used in boiler manufacturing 、() And petroleum equipment manufacturing .（  D  ）

A、 architectural engineering

B、 shipbuilding

C、 Aerospace

D、 Pipework

52、【 Single topic selection 】 When planing , When the arc is ignited , The cutting speed should be slower , Otherwise, carbon inclusion will occur .（  D  ）

A、 The main reason is that the compressed air pressure is low at the beginning , No cooling effect on metal ,

B、 The main reason is that the compressed air pressure is high at the beginning , It has an enhanced cooling effect on the metal

C、 The main reason is that at the beginning , Caused by the instability of arc combustion

D、 The main reason is that the steel plate temperature is low at the beginning of planing , Can't melt quickly

53、【 Single topic selection 】 One of the following materials that belongs to crystals is ().（  A  ）

A、 salt

B、 rosin

C、 glass

D、 asphalt

54、【 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

55、【 Single topic selection 】Ⅲ The concave of grade I weld surface shall not exceed ().（  D  ）

A、1mm

B、1.5mm

C、2mm

D、2.5mm

56、【 Single topic selection 】 One of the causes of direct electric shock accident in welding is in wiring 、 Adjust the welding current in time , Touch the terminal with your hand or body 、 Electric shock caused by charged body such as electrode plate .（  C  ）

A、 Move the stool

B、 Move the table

C、 Mobile welding equipment

D、 Move the workpiece

57、【 Single topic selection 】 The inverter arc welding machine is mainly composed of three-phase full wave rectifier 、 inverter 、 Step down transformer 、() And reactor .（  D  ）

A、 Variable frequency transformer

B、 Saturation reactor

C、 step-up transformer

D、 Low voltage rectifier

58、【 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

59、【 Single topic selection 】 Assembly drawing is to express the working principle of a machine or component 、 Structure, shape and () Patterns of relationships .（  B  ）

A、 test

B、 assembly

C、 machining

D、 install

60、【 Single topic selection 】 There are many harmful factors that will pollute the environment in the welding process , The following factors that are not physically harmful are （  D  ）

A、 Radiation

B、 Welding arc

C、 Thermal radiation

D、 Harmful gases

61、【 Judgment questions 】 Professional ethics should first start with love and dedication 、 The code of professional conduct of dedication began .（  √  ）

62、【 Judgment questions 】 The main pollution hazards of manual arc welding are ： Smoke and light radiation .（  ×  ）

63、【 Judgment questions 】 When the weldment is connected to the negative pole of the power supply , When the electrode is connected to the positive pole of the power supply, the connection method is called reverse connection .（  √  ）

64、【 Judgment questions 】()HS311 It's copper alloy welding wire .（  ×  ）

65、【 Judgment questions 】Cr It's the element symbol of chromium ,Ni It's the elemental symbol of nickel .（  √  ）

66、【 Judgment questions 】 Element refers to the general name of the same kind of atoms with different nuclear charge numbers .（  ×  ）

67、【 Judgment questions 】 Before visual inspection , It is required to remove the slag on the weld surface 、 Clean the oxide scale and welding scar .（  √  ）

68、【 Judgment questions 】() Gas metal arc welding , The welding equipment does not need to ensure that , Stable flow of shielding gas .（  ×  ）

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

70、【 Judgment questions 】() Welding procedure qualification is a computer simulation and result evaluation to verify the correctness of the proposed welding procedure of weldments .（  √  ）

71、【 Judgment questions 】() Product quality is an important basis for enterprises to survive in the market economy .（  ×  ）

72、【 Judgment questions 】() Resistance projection welding fixture is a non-conductive auxiliary positioning device .（  √  ）

73、【 Judgment questions 】() The parameters indicated on the nameplate of arc welding power supply mainly include ： Load duration 、 Rated welding current 、 Primary voltage and power .（  √  ）

74、【 Judgment questions 】 Reputation is the basis for enterprises to survive in the market economy .（  √  ）

75、【 Judgment questions 】() In the iron carbon equilibrium diagram ,PSK The line is eutectic reaction line , It indicates the temperature line of pearlite precipitation from austenite when iron carbon alloy cools slowly .（  ×  ）

76、【 Judgment questions 】() When carbon arc gouging , As long as it is a carbon rod with copper sheet .（  ×  ）

77、【 Judgment questions 】 In the arc static characteristic curve flat characteristic section , When the welding current changes, the voltage is almost constant .（  √  ）

78、【 Judgment questions 】() The significance of professional ethics also includes being conducive to the reform of enterprise system .（  ×  ）

79、【 Judgment questions 】() Total quality management is an organization centered on quality , Based on full participation , The purpose is to achieve long-term success through customer satisfaction and the benefit of all members of the organization and society .（  √  ）

80、【 Judgment questions 】() Matter burns in oxygen , Corrosion of metal in seawater, etc , The chemical reaction that takes place is called oxidation reaction .（  ×  ）

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

82、【 Judgment questions 】 Add potassium to the electrode coating 、 Na 、 Calcium and other elements are conducive to arc generation and stable combustion .（  √  ）

83、【 Judgment questions 】() Brazing uses some metals whose melting point is higher than the base metal as brazing filler metal , Heat the weldment and solder to a temperature higher than the melting point of solder , But the temperature below the melting point of the base metal , Wet the base metal with liquid solder , Method of filling joint gap and mutual diffusion with base metal to realize connecting weldment .（  ×  ）

84、【 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 .（  √  ）

85、【 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 .（  √  ）

86、【 Judgment questions 】 Two are marked with “220V,40W” The bulbs are connected in series and then connected to 220V On the power supply of , The actual power of each bulb is 20W.()（  √  ）

87、【 Judgment questions 】 Cathode spot is a small area that receives electrons intensively during arc discharge .（  ×  ）

88、【 Judgment questions 】() The selection of AC contactor mainly includes the rated voltage of main contact 、 Rated current , Rated current of suction coil .（  ×  ）

89、【 Judgment questions 】() There are two kinds of temperature regulating electric soldering irons: automatic and manual .（  √  ）

90、【 Judgment questions 】() Successful people often have high professional ethics .（  √  ）

91、【 Judgment questions 】 A square is a measuring tool for measuring right angles , It is also a guiding tool for drawing parallel lines and vertical lines .()（  ×  ）

92、【 Judgment questions 】 The iron loss of transformer is constant during operation .()（  √  ）

93、【 Judgment questions 】() Love and dedication as the internal requirement of professional ethics , It means that employees only need to love their favorite jobs .（  ×  ）

94、【 Judgment questions 】() The pipes used by electricians can be divided into steel pipes and copper pipes .（  ×  ）

95、【 Judgment questions 】() The electric power law of the people's Republic of China stipulates that the investment in electric power industry , Who will invest 、 The principle of who benefits .（  √  ）

96、【 Judgment questions 】 It's flammable 、 When working with electricity in explosive places , Just pay attention to safety 、 Prevent electric shock , Generally, there is no danger ()（  ×  ）

97、【 Judgment questions 】() The surface of ordinary internal heating electric soldering iron head is usually galvanized , The protective ability of the coating is poor .（  √  ）

98、【 Judgment questions 】02 Is the elemental symbol of the oxygen atom ,HO It's the molecular formula of water .（  ×  ）

99、【 Judgment questions 】() The shell of the LED is transparent , It's all plastic , The color of the shell indicates its luminous color .（  √  ）

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

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 .