Section 5F Electronics - Solderingoldering in Electronics

What is the primary use of solder in electronics?

• To connect two or more contacts so that electricity can flow between components in an electrical circuit.

• To insulate electrical wires.

• To provide structural support to electronic components.

• To cool down electronic components.

Answer explanation

To connect two or more contacts so that electricity can flow between components in an electrical circuit.

What should be done first when setting up a workstation for soldering?

• Check and clean the PCB.

• Add flux to aid solder flow.

• Set up the workstation and prepare tools and fume extraction.

• Tidy your work and cut back any protruding wires.

Answer explanation

Set up the workstation and prepare tools and fume extraction is the first step when setting up a workstation for soldering.

What is the purpose of adding flux during the soldering process?

• To cool down the soldering iron.

• To aid solder flow and solder the join.

• To clean the PCB.

• To secure the workpiece.

Answer explanation

To aid solder flow and solder the join.

What is the visual difference between a good solder joint and a bad solder joint?

• A good solder joint is shiny, while a bad solder joint is dull.

• A good solder joint is dull, while a bad solder joint is shiny.

• A good solder joint is large, while a bad solder joint is small.

• A good solder joint is small, while a bad solder joint is large.

Answer explanation

A good solder joint is shiny, while a bad solder joint is dull.

What should be done after soldering to ensure the quality of the work?

• Add more flux.

• Check and clean the PCB.

• Tidy your work and cut back any protruding wires.

• Apply a thin layer of solder to components.

Answer explanation

Tidy your work and cut back any protruding wires to ensure the quality of the soldering work.

Which of the following is a safety issue to consider when using a soldering iron?

• Using a high voltage iron to speed up the process.

• Holding the soldering iron by the heating element.

• Using a melted or damaged cable or plug.

• Using a soldering iron without a stand.

Answer explanation

Using a melted or damaged cable or plug is a safety issue as it can lead to electrical hazards or injuries while using a soldering iron.