Wiring and componentsQuestion 473 of 1506

What is a rosin joint?

  1. Flux melted around the metals but the solder never flowed
  2. A joint that was given far too much solder
  3. A joint that was made using acid flux
  4. A joint that was heated far above the right temperature
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Correct answer: Flux melted around the metals but the solder never flowed

The flux acts as an insulator, so the joint conducts poorly or not at all.

Source: Electrical Fundamentals Competency (Industry Training Authority of BC), 10.3: Soldering techniques

Practice wiring and components

Questions last reviewed: 18 October 2026