Question bank and answers for 2022 melting welding and thermal cutting operation certificate examination

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

2022 Melting welding and thermal cutting examination is the simulation and prediction volume of melting welding and thermal cutting work license ！2022 According to the new exam outline of melting welding and thermal cutting . Melting welding and thermal cutting test papers pass the safety production simulation test to improve the examination ability .

1、【 Single topic selection 】 The symbol for elongation of metallic materials is ().（  B  ）

A、Z

B、A

C、R

2、【 Single topic selection 】 The following welding operations that will not cause explosion hazards are ().（  A  ）

A、 Soldering iron brazing

B、 Hot cut cables cut coral or rock

C、 Underwater oxygen arc cutting

3、【 Single topic selection 】 The following statement about oxidation flame is correct ().（  C  ）

A、 Excess acetylene in flame , It contains free carbon and more hydrogen . When welding low carbon steel, the weld will carburize

B、 There is no excess acetylene and oxygen in the flame

C、 The flame is oxidizing , Excess oxygen will burn the alloying elements in the molten pool

4、【 Single topic selection 】 The following situations are not the causes of falling accidents from height ().（  B  ）

A、 The construction personnel suffer from diseases that are not suitable for working at heights , Such as high blood pressure 、 heart disease 、 Anemia, etc

B、 Lightning protection device is not installed

C、 The cave 、 The edge protection measures are not in place

5、【 Single topic selection 】 Measures that do not belong to the prevention of fire and explosion accidents are ().（  C  ）

A、 Careful inspection shall be carried out after operation , Leave the site after confirming that there is no potential fire hazard

B、 Check the connection of weldment , Prevent fire accidents caused by heat conduction

C、 Regularly check the firmness of the ground anchor

6、【 Single topic selection 】 Compared with other copper alloys , What has better mechanical and physical properties is ().（  A  ）

A、 White copper

B、 brass

C、 bronze

7、【 Single topic selection 】 In order to improve the performance of welded joints , Eliminate coarse-grained structure and promote uniform structure, etc , The commonly used heat treatment method is ().（  A  ）

A、 Normalize

B、 Temper

C、 Anneal

8、【 Single topic selection 】 In the following welding methods , What does not belong to fusion welding is ().（  B  ）

A、 Submerged arc welding

B、 Diffusion welding

C、 Argon arc welding

9、【 Single topic selection 】 Substances with chemical explosion , According to its characteristics, it does not include ().（  A  ）

A、 gasoline

B、 Fried ( fire ) drug

C、 Explosive mixture of combustible materials and air

10、【 Single topic selection 】 In gas welding and gas cutting process , The selection of welding wire diameter used is based on ().（  A  ）

A、 Thickness and groove form of weldment

B、 Structure of weldment

C、 The type of flame

11、【 Single topic selection 】 Profiling feed type milling machine fixture is a kind of milling machine fixture with profiling , According to the feeding movement mode, it can be divided into () And circular feed type .（  A  ）

A、 Linear feed type

B、 Curve feed type

C、 Layered feed type

D、 Contour feed type

12、【 Single topic selection 】 A said ： The performance inspection of shock absorber should be carried out on ordinary tools . B said ： Generally, the oil leakage can be checked by appearance . You think the right one of the two is ().（  B  ）

A、 nail

B、 B

C、 Both are true

D、 Neither is true

13、【 Single topic selection 】“ Dragon and Phoenix tea ” The creation of , Take ancient China ( ) The production technology of has pushed to a historical peak .（  D  ）

A、 Steamed green tea

B、 Fried green tea

C、 Scented flowers make tea

D、 Steamed green round tea

14、【 Single topic selection 】 Morality is based on () For the evaluation criteria .（  C  ）

A、 discipline

B、 It is illegal to

C、 Good and evil

D、 Right and wrong

15、【 Single topic selection 】 The diameter of the processed hole is greater than 10mm Or when the machining accuracy is high , It is advisable to use ( ) Drill jig .（  A  ）

A、 Fix

B、 Flip

C、 Turn around

D、 Move

16、【 Single topic selection 】 The heat transfer medium in cooking refers to the heat transfer medium in the process of heat transfer from to raw materials , Including the raw material itself .（  A  ）

A、 heat source

B、 source of a fire

C、 energy

D、 heat

17、【 Single topic selection 】 The flow rate of shielding gas for small pass welding is generally ().（  C  ）

A、40L/min to 80L/min

B、5L/min to 10L/min

C、15L/min to 30L/min

18、【 Single topic selection 】 The degree to which the results of the process meet the specified requirements reflects （） High and low .（  A  ）

A、 Process quality

B、 Check the quality

C、 product quality

D、 Management quality

19、【 Single topic selection 】 Lever type caliper is especially suitable for （）.（  C  ）

A、 Relative measurement

B、 Absolute measurement

C、 Indirect measurement

D、 Dynamic measurement

20、【 Single topic selection 】 The welding current of micro beam plasma arc welding is less than ()A.（  A  ）

A、30

B、40

C、20

21、【 Single topic selection 】 The main difference between manual surfacing process and manual arc welding process is ().（  B  ）

A、 Operation method

B、 Specification parameters

C、 Prevention of welding defects

22、【 Single topic selection 】 When welding , Keep propane bottles away from fire sources ()m above .（  C  ）

A、20

B、15

C、10

23、【 Single topic selection 】 The cutter location of cylindrical milling cutter is the intersection of the tool centerline and the tool bottom ,（） It is the ball center of the ball head .（  C  ）

A、 End milling cutter

B、 Turning tool

C、 Ball end milling cutter

D、 Chamfer milling cutter

24、【 Single topic selection 】 For hydraulic jacks, the weight should be placed in ().（  A  ）

A、 On the large hydraulic cylinder

B、 On the small hydraulic cylinder

C、 One side of the check valve

D、 None of the above is true

25、【 Single topic selection 】 The difference between law and morality is wrong ( ).（  C  ）

A、 Produced at different times

B、 Depending on different forces

C、 Different class attributes

D、 The range of action is different

26、【 Single topic selection 】 The most important essential fatty acids in human nutrition are ().（  C  ）

A、 oleic acid

B、 Linolenic acid

C、 Linoleic acid

D、 Arachidonic acid

27、【 Single topic selection 】 The frequency fluctuation of fusion welding machine shall not be greater than when the voltage is rated ±()%.（  C  ）

A、5

B、3

C、2

28、【 Single topic selection 】 The external characteristics of the power supply used for electroslag welding are ().（  B  ）

A、 Steep drop characteristics

B、 Flat characteristics

C、 Double stepped characteristics

29、【 Single topic selection 】 In a market economy , How to understand love and dedication correctly ( )（  B  ）

A、 Love and dedication are opposite to talent flow

B、 Loving one's post and being dedicated to one's work is the premise of doing one's job well

C、 Only when you find a satisfactory job , To be able to do

D、 How much money and how much work , There is no love and dedication

30、【 Single topic selection 】 The basic technological process of spongy cake is ().（  A  ）

A、 Form first and then mature

B、 Mature before forming

C、 Mature in molding

D、 Form in maturity

31、【 Single topic selection 】 The electric welding machine and other welding and cutting equipment and the lower ground of high-altitude welding and cutting operation points shall be kept ()m above .（  B  ）

A、15

B、10

C、20

32、【 Single topic selection 】 The gas and oxygen produced by calcium carbide in contact with water are mixed and burned , The maximum temperature that can be obtained is ()℃.（  C  ）

A、2000

B、2600

C、3200

33、【 Single topic selection 】 The temperature of plasma arc is particularly high , Generally, it can achieve ()℃.（  C  ）

A、10000

B、30000

C、20000

34、【 Single topic selection 】 It is used to process complex shapes （ Such as curved impeller ）、 CNC machine tools for parts with high accuracy requirements are ().（  C  ）

A、 Two axes

B、 Three axis

C、 Multi axis

D、2.5 Axis

35、【 Single topic selection 】 The elements that can improve the cutting performance of metal materials are ().（  C  ）

A、 silicon

B、 manganese

C、 sulfur

36、【 Single topic selection 】 Once an electric shock accident occurs , First ().（  B  ）

A、 Rescue on site

B、 The person who gets an electric shock should be quickly disconnected from the power supply

C、 Artificial respiration

37、【 Single topic selection 】 The structural condition for the circular eccentric wheel to ensure self-locking is the eccentricity e Only wheel diameter can be taken D Of （）（  C  ）

A、1/20～1/10

B、1/20～1/12

C、1/20～1/14

D、１／20～１/16

38、【 Single topic selection 】 When hoisting objects, cables shall not be less than ( ).（  B  ）

A、 Two

B、 Three

C、 Four

D、 Five

39、【 Single topic selection 】 What impact do you think the market economy will have on the construction of professional ethics （）（  C  ）

A、 Have a positive impact

B、 Bring negative impact

C、 just 、 There are negative effects

D、 No impact

40、【 Single topic selection 】 When boring with a workbench on a horizontal boring machine , Straightness error of longitudinal guide rail in horizontal plane , It will make the center line of the machined hole produce （） error .（  A  ）

A、 Straightness

B、 Coaxiality

C、 Roundness

D、 Flatness

41、【 Single topic selection 】 Charging current is too small , Run the engine at medium speed , Remove the generator “F” And regulator “F” Connection between terminals , Turn the generator with a screwdriver “()” With the generator “F” The terminal is short circuited , If the charge increases , It may be the regulator () Poor contact .（  A  ）

A、 low speed

B、 Medium speed

C、 High speed

D、 Speeding

42、【 Single topic selection 】 The thermal energy equipment for producing steam or hot water is called ().（  A  ）

A、 Boiler

B、 blast furnace

C、 Pressure vessel

D、 Heater

43、【 Single topic selection 】 Professional ethics means that people are engaged in a certain occupation 、 In the performance of their duties , What must be followed in thought and behavior () The sum of the .（  A  ）

A、 Code of conduct and ethics

B、 Code of conduct

C、 Ethical

D、 Code of conduct

44、【 Single topic selection 】 Professional ethics cultivation belongs to ( )（  C  ）

A、 Cultivation of personal character

B、 Cultivation of personal culture

C、 Cultivation of ideology and morality

D、 The accomplishment of professional skills

45、【 Single topic selection 】 The air source of air supply Helmet Mask shall be ().（  C  ）

A、 Carbon dioxide

B、 Pure oxygen

C、 Purified fresh air

46、【 Single topic selection 】 The following is true about the relationship between the rule of virtue and the rule of law , Safety student Production simulation Pass the exam at one o'clock , Yes. （）（  D  ）

A、 Ruling the country by law is more important than ruling the country by virtue

B、 Ruling the country by virtue is more important than ruling the country by law

C、 Rule of virtue is the purpose , The rule of law is a means

D、 The rule of virtue and the rule of law complement each other , Promote each other

47、【 Single topic selection 】 The formation of lightning is due to the .（  D  ）

A、 The voltage is too high

B、 The current is too high

C、 Electron accumulation

D、 Charge accumulation

48、【 Single topic selection 】 The pastry is made of two pieces () The composition of the dough .（  A  ）

A、 Completely different

B、 Exactly the same

C、 Almost the same

D、 It's a little different

49、【 Single topic selection 】 Labor relations disputes , Not satisfied with the arbitration award , Can be directed to ( ) Institute proceedings .（  D  ）

A、 The prosecutor's office

B、 Tax Administration for Industry and commerce

C、 health bureau

D、 The people's court

50、【 Single topic selection 】 Soft frying should be used () Cook .（  B  ）

A、 Slow or medium fire

B、 Medium slow fire or medium fire

C、 A moderate or violent fire

D、 Medium or slow fire

51、【 Single topic selection 】() It is a mechanical mixture of ferrite and cementite .（  D  ）

A、 Martensite

B、 Austenite

C、 Ledeburite

D、 Pearlite

52、【 Single topic selection 】 Thermal deformation of machine tool and external heat source of machine tool ( ).（  A  ）

A、 of

B、 irrelevant

C、 Not much to do with

D、 It matters a lot

53、【 Single topic selection 】 The soleus cortex is thick and old , When processing, everything is on the tail side of the fish body , And apply a small amount of salt to the incision , Turn the fish skin upside down and drop it .（  B  ）

A、 Crosscut

B、 Vertical cutting

C、 Oblique cutting

D、 Side cut

54、【 Single topic selection 】《 Compendium of materia medica 》 Besides being a famous medical book , It's also about () Authoritative works on .（  A  ）

A、 diet

B、 diet

C、 menu

D、 Food and drink

55、【 Single topic selection 】 Through three coordinates " Safety production mold Proposed examination Try a little " The measuring system of the measuring machine can measure that the measuring point of the part is at （）.（  A  ）

A、X Precise coordinates in the direction

B、Y Precise coordinates in the direction

C、Z Precise coordinates in the direction

D、X,Y,Z, Precise coordinates in three directions

56、【 Single topic selection 】 When acetylene burns , The absolutely forbidden fire extinguisher is :（  B  ）

A、 Dry powder fire extinguisher

B、 Carbon tetrachloride fire extinguisher

C、 Carbon dioxide fire extinguisher

57、【 Single topic selection 】 The time of feeding or air inlet after equipment repair welding shall be :（  B  ）

A、 Immediately after welding repair

B、 It must be carried out after complete cooling

C、 Wait three days for

58、【 Judgment questions 】 Atomic hydrogen welding , Higher arc striking voltage shall be adopted .（  √  ）

59、【 Judgment questions 】 Cockroaches like starch or sugar food , So it's not an omnivore .（  ×  ）

60、【 Judgment questions 】 After strenuous exercise , Have a rest 10-15 minute , Eat again .().（  ×  ）

61、【 Judgment questions 】 Crispy fried chicken when cutting pieces , To keep the skin neat , When cutting, the chicken skin should face up .（  ×  ）

62、【 Judgment questions 】 In actual production , Argon is mostly used as cutting gas .（  ×  ）

63、【 Judgment questions 】 After gas cutting, the arc can be broken first , Turn off the compressed air after the carbon rod cools down , You can also turn off the gas first .（  ×  ）

64、【 Judgment questions 】() The tenderizing methods of meat raw materials include alkali tenderizing 、 Salt tenderness and tender meat powder tenderness .（  √  ）

65、【 Judgment questions 】() It is known that A Raw material purchase price 35 element / kg , The rate of ripeness 70％. A product uses A Net material 300 g ,B material 200 g , Unit cost 12 element / kg , The total cost of this product is 9.75 element .（  ×  ）

66、【 Judgment questions 】 The cutting edge of the trapezoidal internal thread cutter ground by the grinding edge shall be straight , The cutting surface should be flat , The knife loading angle should be correct .（  √  ）

67、【 Judgment questions 】 Welding in particularly humid places , People must stand on damp wood or rubber insulation .（  ×  ）

68、【 Judgment questions 】 There are two automatic submerged arc welding machines , Only when used at the same time can welding work be carried out .（  ×  ）

69、【 Judgment questions 】 The biggest characteristic of austenite is that it has no magnetism .、 Safety production simulation Test a little through 、（  √  ）

70、【 Judgment questions 】 The common selection methods are look-up table method 、 Test method 、 Experience method 、 Calculation method . No matter which of the above methods is used, the parameters determined , It doesn't have to be corrected in welding .（  ×  ）

71、【 Judgment questions 】 The atomic part of one lattice is replaced by the atom of another element , It is called interstitial solid solution .（  ×  ）

72、【 Judgment questions 】 Neutral flame is generally used in gas welding , The neutral flame consists of the flame core 、 Inner flame 、 The outer flame consists of three parts .（  √  ）

73、【 Judgment questions 】 When heat treatment is carried out after machining the female die , The hardness is required to reach 60〜64HRC.（  √  ）

74、【 Judgment questions 】 The selection of welding speed is mainly determined by the thickness of the workpiece .（  √  ）

75、【 Judgment questions 】 The material of the lapping tool shall be slightly harder than that of the workpiece , Otherwise, its geometric accuracy is not easy ‘ Latest analysis ‘ keep , The surface affects the grinding accuracy （  ×  ）

76、【 Judgment questions 】 The electrode consists of coating and welding core .（  √  ）

77、【 Judgment questions 】 Electrode arc welding is the most widely used welding method in industrial production .（  √  ）

78、【 Judgment questions 】 The wider the explosion limit , The less dangerous it is .（  ×  ）

79、【 Judgment questions 】 The ratio of oxygen to acetylene in the carbonization flame is less than 1.（  √  ）

80、【 Judgment questions 】 The occupational health examination institution shall ensure that the chief examiners engaged in occupational health work have corresponding professional skills , At the same time, you should also be familiar with the possible occupational hazard factors in the workplace , In order to analyze the relationship between the health status of workers and their professional activities , Judge whether they are suitable for the job .（  √  ）

81、【 Judgment questions 】“ static ” It is a necessary way for Chinese tea ceremony practice .（  √  ）

82、【 Judgment questions 】 For the main components in precision fixture , If it is difficult to reach the specified accuracy by general machining means , No matter which process method is adopted during assembly , It can not meet the requirements of assembly accuracy （ ）（  ×  ）

83、【 Judgment questions 】 The occupational health examination institution shall objectively and truly report the results of occupational health examination , They are not responsible for the inspection results and summary reports they produce .（  ×  ）

84、【 Judgment questions 】1997 year 4 month 10 The Standing Council of the Chinese Nutrition Society approved 《 Dietary guidelines for Chinese residents 》.（  √  ）

85、【 Judgment questions 】 According to the standard management authority ,《 Oolong tea finished tea 》 It belongs to the national standard .（  ×  ）

86、【 Judgment questions 】 Occupational safety and health management system (OSHMS) yes 20 century 70 The modern safety management mode rising in the world in the late s .（  ×  ）

87、【 Judgment questions 】() The condition of infants and young children will worsen during nap .（  √  ）

88、【 Judgment questions 】() According to the structure and working principle, the motor can be divided into asynchronous motor and synchronous motor .（  √  ）

89、【 Judgment questions 】 Food and drink poems are usually collected in literary works such as novels 、 traditional opera 、 Prose and other literary works .（  √  ）

90、【 Judgment questions 】() The product price is the cost of raw materials 、 cost 、 Tax and gross profit “ Ann Full production mold I plan to take an exam Diantong “ and .（  ×  ）

91、【 Judgment questions 】 Many carbon and low alloy structural steels are normalized , All mechanical properties are good , It can refine the grain , Often used as final heat treatment .（  √  ）

92、【 Judgment questions 】 A vehicle for transporting gas cylinders 、 Ships are not allowed in downtown areas 、 Stop near important organs , vehicle 、 When the ship docked , The driver and the escort shall not leave at the same time .（  √  ）

93、【 Judgment questions 】 When carbon arc gouging is carried out, the noise of arc cutting is large , Operators should wear earplugs .（  √  ）

94、【 Judgment questions 】 When making tea, choose the brewing equipment , Such as drinking oolong tea 、 The focus is on “ SIP ”, It is advisable to make tea with a glass .（  ×  ）

95、【 Judgment questions 】() Employees have good professional ethics , It is conducive to enhancing the cohesion of the enterprise , Promote enterprise development , Improve market competitiveness .（  √  ）

96、【 Judgment questions 】 Add iron to brass , It can effectively improve its mechanical properties , But the heat resistance and corrosion resistance have decreased .（  ×  ）

97、【 Judgment questions 】MIG Welding is applicable to the welding of medium and thick plates of aluminum and aluminum alloy, stainless steel and other materials .（  √  ）

98、【 Judgment questions 】 Carbon dioxide welding can be used in automobiles, ships, locomotives, vehicles, containers, mines and construction machinery .（  √  ）

99、【 Judgment questions 】 The method of friction between the mouth of the welding torch and the cutting torch and the plane can be used to remove the blockage at the mouth .（  ×  ）

100、【 Judgment questions 】 At present, only 12V24V36V Three safety voltage levels .（  ×  ）

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