Wiring and componentsQuestion 460 of 1506

Why is a 60/40 solder mix common for soldering work?

  1. It has no plastic state at all
  2. It melts at the lowest possible temperature
  3. It has a narrow plastic state and good conduction and hardness
  4. It contains no lead
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Correct answer: It has a narrow plastic state and good conduction and hardness

A narrow plastic range is wanted in soldering.

Source: Electrical Fundamentals Competency (Industry Training Authority of BC), 10.1: Solder Bonding

Practice wiring and components

Questions last reviewed: 18 October 2026