Which of the following is a cause of contamination of the back side of the molten weld pool?
A. Failure to remove the root edge
B. Insufficient heat, insufficient filler metal
C. Overheating, poor cleaning procedures
D. Excessive root reinforcement
Answer: C
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A pure semiconductor material such as ____ has no special properties and will do little more than make a poor conductive material.
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Answer the following statement true (T) or false (F)