multiple choice
1. The role of flux has ( ABC ).
A. to remove the film
B. Help
c. to protect
D. Anti-corrosion
2. Carbon steel can be divided into ( ABC ) according to the carbon content.
A. Low carbon steel
B. Medium carbon steel
C. High carbon steel
D. Alloy steel
3. According to GB2894-2008 "Safety Signs and Their Use Guidelines", there are four types of safety signs ( BCD ) and prompt signs.
A. Instruction mark
B. Prohibition signs
C. Warning signs
D. Instruction flag
4. In which of the following situations, a guardian ( ABCD ) should be set up for welding operation .
A. Operation in metal container
B. On the metal structure
C. Working at heights
D. Narrow work area
5. Which of the following acetylene bottles are placed correctly is ( AC ).
A. Standing upright
B. Lie down
C. It is inclined at 60 degrees to the ground
D. It is placed at an angle of 20 degrees to the ground
6. What hazards should be mainly prevented in gas welding ( AC ).
A. fire explosion
B. Electric shock
C. soot gas
D. Arc Radiation
7. The commonly used low carbon steels for welding are ( ABD ).
A.Q235
B.20g
C.16Mn
D.20R
8. Welding repair of fuel container pipeline should be mainly prevented ( ABC ).
A. fire explosion
B. Electric shock
C. Poisoning
D. Arc Radiation
9. The harmful elements produced in the welding process of metal materials are mainly divided into ( ABCDE ) categories.
A. Metal soot
B. Toxic gas
C. Arc Radiation
D. High frequency electromagnetic field
E. Noise and rays
10. The main reasons for excessive heating of electric welding equipment are ( ABCD ).
A. Short circuit
B. Overload
C. The contact resistance is too large
D. poor ventilation
The above are the practice questions and answers for the junior welder exam in Jiangxi Province in 2022. Xiaobian and Youtibao will continue to update the junior welder exam simulation questions and answers. If you need it, don't miss it. I also hope that all candidates can achieve good results in the primary welder exam.