Choose the letter of the correct answer.
When making a pipe weld, how can you tell if you are getting penetration through to the root of the joint? (Obj. 20-3)
a. The weld pool will have a sharp point of the leading edge.
b. The weld pool will flatten out.
c. The “birds-eye” of silica will begin dancing in the middle of the weld pool.
d. All of these.
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