__________ is a hard solder?
Correct answer: C. Copper-zinc
- A. Tin-lead
- B. Tin-silver-lead
- C. Copper-zinc
- D. None of the above
Explanation
Copper-zinc alloy, commonly called brass, has a higher melting point and greater mechanical strength than soft tin-lead solder, so it is classified as hard solder. Tin-lead and similar tin alloys are soft solders.
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