Discussion
Which type of solder is preferred if the job is made of copper?
Answer: B
The key gives coarse solder as the one preferred for a job made of copper. Soft solders are alloys of tin and lead in different proportions, and a coarse solder, with more lead, melts over a wider range and is used for heavy joints and thicker copper work, while fine solder, with more tin, is used for electronics. Electrician's solder and electrician's fine solder are names of the types used for wiring and fine work. The answer is Coarse solder, option (B), and the item is a recall question.
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