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12: Review Questions
Welders must not weld in damp places or with damp gloves. They must not touch the work and electrode at the same time. Why?
The heat of the arc will cause chlorinated hydrocarbons used in solvents to form _____, a deadly gas.
Why is it advisable to wear earplugs for out-ofposition welding?
Name the two methods used to strike an SMAW arc.
Which of the following is a method to help reduce or eliminate arc blow?
A. Place the ground connection as close to the weld joint as possible
B. Use the longest possible arc
C. Use an AC machine and electrodes
D. Increase the welding current
What size arc gap is suggested with a 5/32″ (4.0 mm) diameter electrode?
How wide should a stringer bead be for a 1/8″ (3.2 mm) diameter electrode? What is the maximum width for a weave bead when using a 1/8″ (3.2 mm) electrode?
The arc maintained within the covering during drag welding is called a(n) _____ arc.
To prevent slag from mixing with the following weld passes, each weld pass must be cleaned by _____ and then brushing with a wire brush.
How far ahead of the previous crater do you strike an arc when restarting it?
What should be changed if the weld bead is narrow, undercut, and spattered?
When reading a weld bead, what shape is the back of the weld pool?
A. Bullet-shaped
B. Gently rounded
C. Distinct overlapping ridges
D. Pointed arrows
For an inside corner or T-joint, why is it important that the leading edge of the weld pool be C-shaped?
To ensure penetration when welding a butt joint, a(n) _____, or enlarged root opening, must be seen throughout the root pass.
Identify the defects shown in the following sketch.
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