McqMate
| Q. |
Solder is an alloy of – |
| A. | lead, zinc |
| B. | copper, lead |
| C. | tin, lead |
| D. | sodium, lead |
| Answer» C. tin, lead | |
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Explanation: Tin/lead solders, also called soft solders, are commercially available with tin concentrations between 5% and 70% by weight. The greater the tin concentration, the greater the solder's tensile and shear strengths. Alloys commonly used for electrical soldering are 60/40 Tin/lead (Sn/Pb) which melts at 370 °F or 188 °C and 63/37 Sn/Pb used principally in electrical/electronic work. |
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