Source of question bank: Safety production mock exam, WeChat public account mini program
2021 welder (advanced) exam questions and welder (advanced) exam application form, including welder (advanced) exam questions and analysis and welder (advanced) exam application form practice. Combining the latest syllabus of the national welder (advanced) exam and the summary of the real questions of the welder (advanced) exam from the safety production mock exam Yidiantong official account, it is helpful to practice the welder (advanced) mock exam questions.
1. [True and True] arc ignition performance is the test content of the tungsten argon arc welding gun. (×)
2. [Judgment] When welding pressure vessels, the content of sulfur and phosphorus in the welding materials should be limited, and measures such as preheating and slow cooling, and post-welding heat treatment should be adopted to prevent cold cracks. (×)
3. [True or True] In order to prevent burns caused by sparks and slag during overhead welding, the welder can use plastic shawls, long sleeves, aprons, and foot covers. (×)
4. [True and True] Lethal current refers to the current that is life-threatening in a relatively short period of time, about 50mA AC. Under the condition of protection device to prevent electric shock, the allowable current of the human body is generally considered as 30mA. (√)
5. [Judgement Questions] The hydraulic test should be carried out after the visual inspection is qualified. (×)
6. [Judgement Question] Pearlitic heat-resistant steel is mainly low-alloy steel with high temperature strength and oxidation resistance based on chromium and molybdenum. Generally, the maximum working temperature is about 500-600℃. (√)
7. [True or True] Manual gas cutting has the advantages of flexibility and convenience, so it is especially suitable for gas cutting of large thickness steel plates and medium and high carbon steels and high alloy steels that need to be preheated. (×)
8. [Judgement Questions] The problem that is prone to occur when welding pearlite steel and austenitic stainless steel is intergranular corrosion in the weld. (×)
9. [Judgement Questions] People engaged in professional activities must consciously abide by the systems and disciplines related to professional activities and behaviors. (√)
10. [True or True] Steel and cast iron are iron-carbon alloys, and iron-carbon alloys with a carbon mass fraction of less than 2.11% are called steel. (√)
11. [True/True Question] The greater the impact toughness of the material, the better the toughness, and the less likely it is to break when subjected to impact. Impact toughness is also related to temperature, the higher the temperature, the smaller the impact toughness. (×)
12. [Judgment] Use E310-15 electrode to weld 1Cr18Ni9 stainless steel and Q235 low carbon steel. If the fusion ratio is 40%, the weld is austenite + ferrite with higher crack resistance. (×)
13. [True/True Question] Boiler pressure vessel is a tension vessel with the risk of fracture that is widely used in production and life. (×)
14. [True and True] Welding site should maintain necessary passages, and the width of vehicle passages should not be less than 3m. (√)
15. [True and True] Because of the large linear expansion coefficient and shrinkage rate of copper, the heat is quickly transferred from the heating zone during welding, making it difficult for the base material and filler metal to fuse. (×)
16. [True and True] For a relatively dry environment with greater risk of electric shock, our country stipulates a safety voltage of 36 volts. (√)
17. [Single choice] When welding brass, in order to suppress the evaporation of (), you can choose brass or silicon bronze welding wire with high silicon content. (C)
A, copper
B, manganese
C, zinc
D, silicon
18. [Single-choice question] Chemical cleaning method to remove the oxide film on the surface of aluminum and aluminum alloy does not include () process. (C)
A, alkaline washing
B. Zhonghe Guanghua
C. Machining
D, dry
19. [Single-choice question] General medium pressure vessels are category () pressure vessels within the scope of application of the "Regulations". (B)
A. One
B, two
C, three
D. Four
20. [Single-choice question] The cutting torch moves with the magnetic head along a certain shape of the profiler, and the gas cutting machine that cuts the required shape of the workpiece is (). (B)
A, CNC gas cutting machine
B, profile gas cutting machine
C. Photoelectric tracking gas cutting machine
D. Semi-automatic gas cutting machine
21. [Single choice] Oblique Y-shaped groove butt joint crack test is suitable for the performance test of carbon steel and low alloy steel. (D)
A. Hot cracks
B. Reheat cracks
C. Crater crack
D, cold crack
22. [Single-choice question] The stainless steel clad plate is a bimetallic plate made of () composite rolling (B)
A. Thicker stainless steel cladding and thinner pearlite steel base layer
B. Thinner stainless steel cladding and thicker pearlite steel base layer
C. Thicker stainless steel base layer and thinner pearlite steel cladding
D. Thinner stainless steel base layer and thicker pearlite steel cladding
23. [Single-choice question] When welding cast iron, the type of pores produced in the weld is mainly (). (C)
A. CO2 gas hole and nitrogen gas hole
B. CO stomata and CO2 stomata
C, CO pores and hydrogen pores
D. CO2 pores and hydrogen pores
24. [Single-choice question] Because the spheroidizing agent has the effect of hindering graphitization, nodular cast iron tends to produce white cast iron structure (). (D)
A. Same as gray cast iron
B. Smaller than gray cast iron
C, much smaller than gray cast iron
D. Bigger than gray cast iron
25. [Single choice] The number of impact samples of welded joints should be ()3 according to the position of the notch. (A)
A. Each is not less than
B. Not less than
C. The average is not greater than
D. The average is not less than
26. [Single choice] () belongs to the debugging content of the tungsten argon arc welding machine. (A)
A. The integrity of the gas supply system
B. Straightening of welding wire
C. The walking speed of the trolley
D. The diameter of the tungsten electrode
27. [Single choice] The ability of metal materials to produce plastic deformation under the action of external force is called (). (B)
A. Tensile strength
B. Plasticity
C. Impact toughness
D, yield point
28. [Single-choice question] When welding and repairing cast iron, the purpose of using the heating reduction zone method is to (). (A)
A. Reduce welding stress and prevent cracks
B. Prevent the formation of white cast iron structure
C. Get high-strength welds
D, get high plastic weld
29. [Single choice] When welding aluminum alloy, () is not the main measure to prevent hot cracks. (D)
A, preheat
B. Use small welding current
C. Reasonable selection of welding wire
D. Use argon protection
30. [Single choice] When brass gas welding, use a weak oxidizing flame to form a layer of () film on the surface of the weld to prevent the evaporation of zinc. (A)
A, silicon oxide
B, zinc oxide
C, copper oxide
D, alumina
31. [Single-choice question] In order to obtain high-quality welded joints, the key to argon arc welding of titanium and titanium alloys is the protection of areas above 400°C. There are no special protective measures required (). (D)
A. Adopt nozzle and drag cover
B. Welding in a box filled with argon or argon-helium mixture
C. Argon filling device is used on the back of the weldment
D. Welding in a box filled with CO2 or argon + CO2 mixture
32. [Single choice] After cleaning the surface of aluminum and aluminum alloy workpieces and welding wire, the storage time in () is generally not more than 24h. (D)
A. In argon
B. In an environment polluted by alkali and acid vapor
C. In a humid environment
D. In dry air
33. [Single-choice question] In the pressure vessel, only the () head is widely used when the head is connected to the cylinder. (B)
A, spherical or flat cover
B, spherical or oval
C, square or spherical
D, flat cover or oval
34. [Single-choice question] During fluorescent flaw detection, due to the effect of fluorescent liquid and developer, strong fluorescence appears at the defect. According to the difference of luminescence, the defect can be determined (). (C)
A. Location and nature
B. Depth and size
C. Location and size
D, structure and type
35. [Single-choice question] In order to obtain a 2% ferrite-containing austenite + ferrite dual phase structure for the weld, if the fusion ratio is 40%, you should choose () to weld 1Cr18Ni9 stainless steel and Q235 low carbon steel . (D)
A, J507 welding rod
B, A102 welding rod
C, A407 welding rod
D, A307 welding rod
36. [Single-choice question] Fluorescent flaw detection is used to find surface defects of various welded joints, and is often used as an inspection for (). (D)
A. Large pressure vessel
B. Small welding structure
C. Magnetic material workpiece
D, non-magnetic material workpiece
37. [Single-choice question] In order to prevent burns caused by sparks and slag during overhead welding, the welder can use () shawls, long sleeves, aprons and foot covers. (C)
A. Plastic
B. Synthetic fiber fabric
C. Asbestos
D, cotton
38. [Single-choice question] The restraint welds at both ends of the butt-joined cracked specimen with oblique Y-shaped grooves shall be (). (B)
A. Titanium calcium electrode
B. Low-hydrogen electrode
C. Ilmenite type electrode
D. High-fiber potassium electrode
39. [Single-choice question] Because aluminum and aluminum alloy have low melting point, low high temperature strength, and no significant color change when melting, they are prone to () defects during welding. (D)
A. Stoma
B. The joints are not equal
C, hot crack
D, collapse
40. [Multiple Choice Questions] The significance of professional ethics is far-reaching, but does not include (). (C)
A. Conducive to promoting the construction of socialist spiritual civilization
B. Conducive to industry construction and development
C. Conducive to social system reform
D. Conducive to personal improvement and development
41. [Single choice] The () of the welding tongs should be checked. (C)
A, magnetic permeability
B. Thermal expansion
C. The firmness of the clamping electrode
D. Plasticity
42. [Single choice] Brass is an alloy of copper and (). (D)
A, 锡
B, manganese
C, nickel
D, zinc
43. [Single-choice question] According to the provisions of GB/T1591-94, the grades of low-alloy high-strength structural steel are arranged in order from three parts: representative (), yield point value, and quality grade symbol. (D)
A. The letter "H" for welding steel
B. The letter "Q" for strength steel
C, the letter "D" of low alloy
D. The letter "Q" of the yield point
44. [Single choice] Among the following welding wires, () is alloy cast iron welding wire. (C)
A 、 RZCQ-1
B 、 RZC-2
C 、 RZCH
D、RZC-1
45. [Single-choice question] The requirements for the butt joint crack test of the oblique Y-shaped groove: The number of test pieces is (), take 2 pieces. (A)
A. Each test
B. Each kind of base material
C. Each electrode
D. Each welding process parameter
46. [Multiple choice] () is not the basic organization of iron-carbon alloys. (D)
A. Cementite
B. Austenite
C, martensite
D. Rhine body
47. [Single-choice question] When reading assembly drawings, the purpose is not to understand (). (A)
A. All dimensions of parts
B. Assembly relationship and disassembly relationship between parts
C. The role of parts and transmission routes
D. The name and working principle of the machine or component
48. [Single-choice questions] () can be used to weld pure aluminum or aluminum alloys that are not demanding. (C)
A、SAlMg-5
B、SAlMn
C 、 SAl-3
D 、 SAlCu
49. [Single-choice question] When the welded joint of pearlite steel and austenitic stainless steel works under heat treatment or high temperature conditions, carbon diffuses from (), (C)
A. Austenitic stainless steel weld to pearlite steel base material
B. Austenitic stainless steel weld to austenitic stainless steel base material
C. Welding seam of pearlite steel base metal to austenitic stainless steel
D. Austenitic stainless steel base material to austenitic stainless steel weld
50. [Single-choice question] Mobile pressure vessels, including railway tank cars, tank cars, etc., are one of the () pressure vessels within the scope of the "Regulations". (D)
A, the second category
B. The fourth category
C. The first category
D. The third category
The above is the 2021 welder (advanced) exam questions and welder (advanced) exam application form. Support the examination questions of precision welders (advanced) in all regions of the country, and support the exercises in the question bank of safety qualification certificates, special operation certificates, and vocational skills identification.