Wiring and componentsQuestion 462 of 1506

Why must a soldering iron tip be tinned?

To keep air and contaminants off the tip and help the solder flow
To raise the tip temperature above 425 C
To stop the iron drawing current
To make the tip softer

Show answer

Correct answer: To keep air and contaminants off the tip and help the solder flow

A poorly tinned tip makes a sound joint almost impossible.

Source: Electrical Fundamentals Competency (Industry Training Authority of BC), 10.2: Soldering Tools

Questions last reviewed: 18 October 2026

Red Seal Electrician Practice needs JavaScript to run. Use its questions for practice. The real pass mark is usually 70%. Check it with your province or territory's apprenticeship office.