Question

1. in smaw welding, what is \weaving\?

a) a pattern used to control the shape of the weld bead
b) a type of electrode
c) a technique used to strike the arc
d) a type of welding machine

1. what is the purpose of the post - weld cleaning process in smaw welding?

a) to add additional filler material to the weld
b) to inspect the weld for defects
c) to remove slag and spatter from the weld
d) to cool the workpiece

1. which of the following is not a type of electrode used in smaw welding?

a) e6010
b) e7018
c) e308
d) e9012

1. in smaw welding, what does \amperage\ refer to?

a) the rate of heat transfer in the welding process
b) the size of the electrode
c) the electrical current used in the welding process
d) the shape of the weld bead

1. in smaw welding, what is the purpose of the backstep technique?

a) to create a decorative pattern on the weld bead
b) to repair defects in the weld
c) to control the cooling rate of the weld
d) to maintain a consistent arc length

1. which of the following is a common cause of \undercut\ in smaw welding?

a) excessive heat input
b) insufficient amperage
c) incorrect electrode angle
d) lack of preheating

Explanation:

• Question 29: In SMAW welding, weaving is a pattern used to control the shape of the weld bead. It helps in distributing heat evenly and achieving a proper fusion.
• Question 30: The post - weld cleaning process in SMAW welding is mainly to remove slag and spatter from the weld. Slag is a by - product of the welding process and spatter can affect the appearance and sometimes the quality of the weld.
• Question 31: E308 is not a type of electrode used in SMAW welding. E6010, E7018 are common electrodes in SMAW. E9012 is also not a standard SMAW electrode.
• Question 32: Amperage in SMAW welding refers to the electrical current used in the welding process. It affects the heat input, penetration, and deposition rate.
• Question 33: The backstep technique in SMAW welding is used to control the cooling rate of the weld. By welding in short segments in the opposite direction, it helps in reducing distortion and residual stresses.
• Question 34: Incorrect electrode angle is a common cause of undercut in SMAW welding. An improper angle can lead to excessive melting of the base metal on one side without proper filler metal deposition.

Answer:

1. a) A pattern used to control the shape of the weld bead
2. c) To remove slag and spatter from the weld
3. c) E308
4. c) The electrical current used in the welding process
5. c) To control the cooling rate of the weld
6. c) Incorrect electrode angle