2022 free test questions of fusion welding and thermal cutting and summary of fusion welding and thermal cutting examination

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

Pass the safety production simulation exam at one point ： The free test questions of melting welding and thermal cutting are generated by the one-point pass of the safety production simulation exam , Melting welding and thermal cutting certificate simulation examination question bank is compiled according to the latest version of melting welding and thermal cutting teaching materials .2022 Free test questions of melting welding and thermal cutting and summary of melting welding and thermal cutting examination

1、【 Single topic selection 】 When aluminum alloy is welded by consumable electrode argon arc welding , The method used is ().（  B  ）

A、 The ac power

B、 DC reverse connection

C、 DC positive connection

2、【 Single topic selection 】 The submerged arc welding of the butt circumferential seam of the circular cylinder shall adopt the rolling tire with speed regulating device , If double-sided welding is to be used , The welding position is first ().（  B  ）

A、 Outside the barrel

B、 Inside the cylinder

C、 No influence

3、【 Single topic selection 】 The electro-optic conversion efficiency of carbon dioxide laser is compared with that of solid-state laser ().（  A  ）

A、 high

B、 There is no difference

C、 low

4、【 Single topic selection 】 When working in the narrow compartment of the container , Welding and cutting torches shall be :（  B  ）

A、 Pull out after work

B、 Walk in and out with people

C、 Dispose of at will

5、【 Single topic selection 】 When using gas cylinders , The following acts should be prohibited ().（  C  ）

A、 Pipelines and equipment in contact with gas cylinders shall be provided with grounding devices , Prevent burning or explosion caused by static electricity

B、 When gas cylinders and electric welding are used in the same place , The bottom of the bottle should be padded with insulation , In case the gas cylinder is charged

C、 Welders use greasy tools 、 Gloves or greasy work clothes to contact the oxygen cylinder valve 、 Pressure reducer, etc

6、【 Single topic selection 】 The highest spontaneous combustion point of the following substances is ().（  C  ）

A、 Carbon disulfide

B、 Ether

C、 Soybean oil

7、【 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

8、【 Single topic selection 】 Among the following options, the measures against harmful smoke and dust are ().（  A  ）

A、 Strengthen the personal protection of welders , Wear protective masks when working

B、 Welders must correctly wear special protective work clothes for welders during welding 、 Insulated gloves and insulated shoes

C、 For the production plant area in close operation 、 Welding in oil tank farm , A firewall must be built

9、【 Single topic selection 】 What cannot protect against indirect electric shock is ().（  A  ）

A、 Use high voltage

B、 use Ⅱ First class electrical products

C、 Ungrounded local equipotential connection protection is adopted

10、【 Single topic selection 】 The distance between the grounding body of the grounding device and the building shall not be less than ()m.（  B  ）

A、3

B、1.5

C、2

11、【 Single topic selection 】 The technical features of non vacuum electron beam welding do not include ().（  A  ）

A、 High power density

B、 The cost is low

C、 High production efficiency

12、【 Single topic selection 】 Contact burns occur in high-voltage electric shock accidents , Burn caused by current passing through the inlet and outlet of human skin , Generally, the more serious burns are ().（  B  ）

A、 Current outlet

B、 Current inlet

C、 As serious as

13、【 Single topic selection 】 The following are not aluminum 、 The welding method of magnesium and its alloys is ().（  C  ）

A、 AC plasma arc welding

B、 DC reverse plasma arc welding

C、 DC positive plasma arc welding

14、【 Single topic selection 】 When the surfacing transition layer method is adopted to prevent the metal cracking of the surfacing layer , Hardness of surfacing metal ().（  B  ）

A、 The lower

B、 Very high

C、 Higher

15、【 Single topic selection 】 About the application field of gas cutting , The following statement is correct ().（  C  ）

A、 Only simple shapes can be cut

B、 Cut any material

C、 Steel plate blanking 、 Cutting of welding groove and casting riser

16、【 Single topic selection 】 Of the following options, mechanical injury is ().（  A  ）

A、 Crush injury

B、 Pollution

C、 Get an electric shock

17、【 Single topic selection 】 oxygen - Acetylene flame surfacing , Penetration ().（  B  ）

A、 No special requirements

B、 The shallower the better

C、 The deeper the better

18、【 Single topic selection 】 During vacuum electron beam welding , Strictly check whether the vacuum chamber is sealed , Prevent escape :（  A  ）

A、X ray

B、γ ray

C、β ray

19、【 Single topic selection 】 In case of electric shock , The most important first step in giving first aid to an electrocuted person is :（  A  ）

A、 First, disconnect the person who gets an electric shock from the power supply

B、 Do artificial respiration

C、 Perform external cardiac compression

20、【 Single topic selection 】 The stud welding method belongs to ().（  C  ）

A、 Brazing

B、 Pressure welding

C、 Fusion welding

21、【 Single topic selection 】 Air cooled fusion welding machine , The altitude does not exceed ()m.（  A  ）

A、1000

B、500

C、200

22、【 Single topic selection 】 The following are the of China's special laws on work safety ().（  A  ）

A、《 Mine Safety Law of the people's Republic of China 》、《 Fire control law of the people's Republic of China 》

B、《 Consumer protection law 》

C、《 Tax law 》

23、【 Single topic selection 】 The following statement is correct ().（  C  ）

A、 Alkaline electrodes are generally not used for the welding of alloy steel and important carbon steel structures

B、 The deoxidation of alkaline slag is incomplete

C、 Alkaline electrode can effectively eliminate sulfur in weld metal

24、【 Single topic selection 】 The features of welding and cutting without displacement under pressure do not include ().（  C  ）

A、 Short operation time

B、 Fewer programs

C、 Time consuming and troublesome

25、【 Single topic selection 】 The code name of superhard aluminum alloy is ().（  B  ）

A、LF

B、LC

C、LY

26、【 Single topic selection 】 The paint alloy mode of electroslag welding is ().（  B  ）

A、 Alloy powder

B、 Plate pole

C、 Band pole

27、【 Single topic selection 】 The temperature of acetylene generator can only be () instructions .（  B  ）

A、 Mercury thermometer and alcohol thermometer

B、 Alcohol thermometer

C、 Mercury thermometer

28、【 Single topic selection 】 When using water extinguisher , To put out the fire effectively , It should be aimed at the fire source ().（  C  ）

A、 In the middle of the fire

B、 The top of the fire source

C、 The bottom of the fire source

29、【 Single topic selection 】 Surfacing round workpiece , When the diameter of welding wire is 1.6mm when , The surfacing pitch is ().（  A  ）

A、2.5mm to 4mm

B、2mm to 3.5mm

C、1mm to 2.5mm

30、【 Single topic selection 】 The products of aluminothermic reaction during aluminothermic welding are ().（  A  ）

A、 Alumina

B、 Pure aluminum

C、 Aluminium chloride

31、【 Single topic selection 】 The cutting principle of oxygen flux is to use cutting flame , The specific method is ().（  A  ）

A、 Powder

B、 oxygen - Acetylene flame

C、 Liquefied petroleum gas

32、【 Single topic selection 】 Prevention and treatment of occupational diseases , The responsibilities and obligations of the employer include ().（  A  ）

A、 Occupational health monitoring shall be conducted for workers engaged in operations exposed to occupational disease hazards

B、 Carry out occupational health monitoring for all workers in the unit

C、 Conduct occupational health monitoring for regular workers who are exposed to occupational hazards

33、【 Single topic selection 】 When carbon arc gouging is working in the open air , The operating direction shall be :（  A  ）

A、 Downwind

B、 Against the wind

C、 arbitrarily

34、【 Single topic selection 】 During automatic submerged arc surfacing , The surfacing current increases , Penetration ().（  C  ）

A、 unchanged

B、 Reduce

C、 increase

35、【 Single topic selection 】 The fire that water can't put out is ().（  C  ）

A、 forest fire

B、 Oil fires

C、 Store a large amount of concentrated sulfuric acid 、 Fire occurs in places with concentrated nitric acid

36、【 Single topic selection 】 There are many methods of weldability evaluation , The widely used method is ().（  A  ）

A、 Carbon equivalent method

B、 Sulfur equivalent method

C、 Phosphorus equivalent method

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

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

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

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

38、【 Single topic selection 】 Solid carbon dioxide is commonly known as ().（  B  ）

A、 Volatile agent

B、 Dry ice

C、 Solid ice

39、【 Single topic selection 】 1 The standard atmospheric pressure is ().（  C  ）

A、101125Pa

B、101225Pa

C、101325Pa

40、【 Single topic selection 】 The following () Suitable for containing flammable liquids .（  C  ）

A、 Glass container

B、 Porcelain

C、 Metal container with anti-corrosion function

41、【 Single topic selection 】 The effect of welding on human body () On the one hand, there can be symptoms of local vibration disease , On the other hand, dizziness may also occur 、 vomiting 、 nausea 、 deaf 、 Gastroptosis 、 Anxiety and other symptoms .（  A  ）

A、 Whole body vibration

B、 Local vibration

C、 Strong vibration

42、【 Single topic selection 】 The suitable welding position for manual plasma arc welding is ().（  B  ）

A、 Flat welding

B、 All position

C、 Transverse welding

43、【 Single topic selection 】 A new fusion welding machine shall pass the test of specified items before being assembled and leaving the factory , The following are not part of the test ().（  B  ）

A、 No load test

B、 Compression test

C、 Short circuit test

44、【 Single topic selection 】 When surfacing , The dilution ratio should be ().（  A  ）

A、 As low as possible

B、 As high as possible

C、 No special requirements

45、【 Single topic selection 】 The properties of sodium hydroxide do not include ().（  C  ）

A、 corrosive

B、 Water absorption

C、 Dehydration

46、【 Single topic selection 】 When cleaning containers with alkali , The alkali used is ().（  A  ）

A、 Sodium hydroxide

B、 Potassium hydroxide

C、 Magnesium hydroxide

47、【 Single topic selection 】 In the process of submerged arc welding, attention shall be paid to prevent the eyes from being exposed and burned by strong arc light due to the sudden stop of flux supply . The following measures cannot prevent injury ().（  B  ）

A、 Wear ordinary protective glasses

B、 Wear myopia glasses

C、 Operators often pay attention to the flux content , Make up in time

48、【 Single topic selection 】 The ratio of oxygen to acetylene in the carbonization flame ().（  C  ）

A、 be equal to 1

B、 Greater than 1

C、 Less than 1

49、【 Single topic selection 】 Isobaric welding torch ().（  A  ）

A、 Can use acetylene cylinder or medium pressure acetylene generator

B、 Use only low pressure acetylene generators

C、 Use only high pressure acetylene generators

50、【 Single topic selection 】 The widmanstatten structure changes the properties of steel into ().（  A  ）

A、 Toughness decreases

B、 Plasticity increases

C、 Brittleness reduction

51、【 Single topic selection 】 The main reason why fires kill people is ().（  A  ）

A、 asphyxia

B、 Trampled

C、 Burn

52、【 Single topic selection 】 When gas welding pure copper , Should use ().（  A  ）

A、 Weak carbonization flame

B、 Weak oxidation flame

C、 Neutral flame

53、【 Single topic selection 】 When plasma cutting carbon steel , In order to obtain a higher surface hardness of the cutting surface , Ionic gas can be used ().（  B  ）

A、 oxygen

B、 nitrogen

C、 hydrogen

54、【 Judgment questions 】 Acetylene cylinders shall be subject to regular technical inspection during use , At least every three years .（  √  ）

55、【 Judgment questions 】 The welding current is the most important parameter to determine the weld width .（  ×  ）

56、【 Judgment questions 】 Cutting and welding “ Ten don't burn ” One of them doesn't meet the requirements , Have the right to refuse welding and cutting .（  √  ）

57、【 Judgment questions 】 In order to obtain a small dilution ratio 、 Formed surfacing layer , The surfacing current and arc voltage should be well matched .（  √  ）

58、【 Judgment questions 】 《 Law of the people's Republic of China on the prevention and control of occupational diseases 》 The provisions of the : Adhere to prevention first in the prevention and control of occupational diseases 、 The policy of combining prevention and control , Implement classified management 、 Comprehensive management .（  √  ）

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

60、【 Judgment questions 】 Hydrochloric acid is used to remove scale 、 The most commonly used solution for rust scale .（  √  ）

61、【 Judgment questions 】 The electron beam welder operates under high voltage , The observation window shall be lead glass .（  √  ）

62、【 Judgment questions 】 Major potential accidents refer to hazards and difficulties in rectification , It shall stop production or business in whole or in part , Hidden dangers that can be eliminated only after rectification and treatment for a certain period of time , Or due to external factors , The hidden dangers that make it difficult for the production and business operation unit to eliminate .（  √  ）

63、【 Judgment questions 】 When it is inconvenient to carry out cardiopulmonary resuscitation on site , Try to adjust repeatedly until the injured person gets an electric shock to a convenient position .（  ×  ）

64、【 Judgment questions 】 In order to save energy , Try to use up the gas in the acetylene cylinder .（  ×  ）

65、【 Judgment questions 】 Welding of general workpieces , After welding a certain number of test pieces , After visual inspection, it shall be free of excessive indentation, crack and overburning, and can be put into production .（  ×  ）

66、【 Judgment questions 】 During welding, the visible brightness of the arc is greater than that normally borne by the naked eye 1000 times .（  ×  ）

67、【 Judgment questions 】 According to the national standard , The allowable working pressure of the oxygen hose is 1.5MPa.（  √  ）

68、【 Judgment questions 】 The grid power supply parameters of fusion welding equipment must be or 380V,50Hz.（  ×  ）

69、【 Judgment questions 】 Cross operation at the edge of the portal, climbing operation, hanging operation , Use safety helmet, safety net and safety belt according to the specifications , And strictly strengthening protective measures can reduce the occurrence of high-altitude falling accidents .（  √  ）

70、【 Judgment questions 】 The atoms of metal are regularly arranged in a certain way into a crystal lattice with a certain spatial geometry , It's called lattice .（  √  ）

71、【 Judgment questions 】 Major hazard installations refer to the long-term or temporary production, handling, use or storage of dangerous goods , And the quantity of dangerous goods is equal to or exceeds the critical quantity .（  √  ）

72、【 Judgment questions 】 When electroslag welding , In case of short circuit , Welding shall be stopped immediately , But you don't have to cut off the power .（  ×  ）

73、【 Judgment questions 】 When welding with electrodes , Welding rod, weldment and coating under the action of arc high temperature , It evaporates and condenses into fog beads, producing a large amount of smoke and dust .（  √  ）

74、【 Judgment questions 】 High frequency oscillator shall be used for arc striking in fusion welding , Because of the short time , The impact is small , So it's harmless to the human body .（  ×  ）

75、【 Judgment questions 】 The three-level approval system is generally implemented for hot work in the no fire area .（  √  ）

76、【 Judgment questions 】 When using flux containing fluoride , Welding must be carried out under ventilated conditions , Or use personal protective equipment .（  √  ）

77、【 Judgment questions 】 Welding noise will have adverse effects on human nervous system, cardiovascular system, etc .（  √  ）

78、【 Judgment questions 】 Industrial acetylene is mixed with impurities such as hydrogen sulfide and phosphine , Has a special odor .（  √  ）

79、【 Judgment questions 】“ Safe production method ” Specify special operation personnel , Must pass the special safety operation training and examination , After obtaining the grade work certificate , Before you can work .（  ×  ）

80、【 Judgment questions 】 The quality of welding torch has little effect on welding quality .（  ×  ）

81、【 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 .（  ×  ）

82、【 Judgment questions 】 Cutting torch is the main tool for gas cutting .（  √  ）

83、【 Judgment questions 】 Production and business operation entities shall, in accordance with the relevant provisions of the state , Major hazard sources and safety measures of the unit 、 The emergency measures shall be reported to the relevant departments of the local people's government responsible for the supervision and administration of production safety for the record .（  √  ）

84、【 Judgment questions 】 Carbon arc gouging is to use the high temperature of carbon arc to melt the metal , A method of planing metal by blowing away molten metal with compressed air .（  √  ）

85、【 Judgment questions 】 In the process of production, storage and use of combustible gas , Strictly prevent the leakage of container and pipeline .（  √  ）

86、【 Judgment questions 】 After the gas cylinder is put into use , The bottle body shall not be patched , But it can be repaired by welding .（  ×  ）

87、【 Judgment questions 】 When using gas cylinders , The place where the gas cylinder is placed , Open fire 10m within .（  ×  ）

88、【 Judgment questions 】 The metallurgical reaction time between liquid metal and molten flux is short , Can not effectively reduce the porosity in the weld 、 Cracks and other defects .（  ×  ）

89、【 Judgment questions 】 The air source of air supply Helmet Mask shall be purified fresh air , Oxygen can be used instead of , Provide workers with a good working environment .（  ×  ）

90、【 Judgment questions 】 When LPG is used as gas source for gas cutting , Compared with acetylene flame , Its cutting quality is good , But when cutting multilayer laminates , Cutting speed is slower than acetylene .（  ×  ）

91、【 Judgment questions 】 Carbon rods used in carbon arc gouging are generally solid copper plated carbon rods .（  √  ）

92、【 Judgment questions 】 The units of impact absorption energy and impact toughness are joules .（  ×  ）

93、【 Judgment questions 】 Good plasma arc stiffness , The diffusion angle is generally 10°.（  ×  ）

94、【 Judgment questions 】 Acetylene generator shall not be used with copper content exceeding 70% Copper alloy 、 Silver, etc. as gasket 、 Pipe joints and other parts .（  √  ）

95、【 Judgment questions 】 Local mechanical exhaust , It is to use the mechanical force to transfer the harmful substances produced from the room ( The welding area is covered with ) Discharge , Or send the filtered and purified air into the room .（  √  ）

96、【 Judgment questions 】 Use capacitors to store electrical energy , Then quickly release the heat to complete the spot welding, which is called capacitive energy storage seam welding .（  ×  ）

97、【 Judgment questions 】 When argon arc welding is carried out inside the vessel , Special personnel shall be assigned outside the container for supervision and cooperation .（  √  ）

98、【 Judgment questions 】 The goal of safety production management is to reduce and control hazards , Reduce and control accidents , Try to avoid equipment damage caused by accidents in the production process 、 property loss 、 Environmental pollution , Other personnel losses can be ignored .（  ×  ）

99、【 Judgment questions 】 The surface surfacing can be welded by carbon dioxide gas shielded welding .（  √  ）

100、【 Judgment questions 】《 Regulations on work safety license 》 The main content does not include the target object and management organ , Conditions and validity period of work safety license .（  ×  ）

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