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8187
Which statement concerning soldering is correct?
| | A) Joints in electric wire to be soldered should be mechanically secure prior to soldering. |
| | B) If the soldering temperature is too high, the solder will form in lumps and not produce a positive bond. |
| | C) Changeable shades of blue can be observed on the surface of a copper soldering tip when the proper temperature for soldering has been reached. |
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