Wiring and componentsQuestion 441 of 1506

An electrician tins a stranded wire. What is the sign that the correct amount of solder was used?

  1. The strands can still be seen through the solder
  2. The solder forms a thick ball on the end
  3. The solder runs under the insulation
  4. The wire looks smooth, with no strands showing
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Correct answer: The strands can still be seen through the solder

Too much solder wicks under the insulation and makes the wire stiff.

Source: Electrical Fundamentals Competency (Industry Training Authority of BC), 9.2: Soldered Connections

Practice wiring and components

Questions last reviewed: 18 October 2026