Wiring and componentsQuestion 471 of 1506

What most often causes a cold solder joint?

Using too much flux
Touching the solder to the iron tip instead of the heated joint
Moving the joint while it cools
Cleaning the metals before soldering

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Correct answer: Touching the solder to the iron tip instead of the heated joint

The solder melts before the joint is hot enough.

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

Questions last reviewed: 18 October 2026

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