STP ASSESSMENT 10 Soldering techniques

What is the primary metal used in most solder wire?

• Lead

• Copper

• Tin

• Iron

When storing a soldering iron, it's best to . . .

• Leave it plugged in and hot

• Tin the tip with a small amount of solder

• Push the warm tip into a water soaked sponge

• Let it cool completely and store it upright

What is the purpose of flux in soldering?

• To clean the tip of the iron

• To improve solder flow and remove oxides

• To create a smooth surface for soldering

• To remove excess solder

What safety precaution is MOST important when soldering?

• Wearing gloves

• Using lead-free solder

• Working in a well-ventilated area

• Keeping water nearby

What should the soldering iron tip temperature be for most electronic components?

• 280 - 320°C

• 320 - 360°C

• 360 - 400°C

• 400 - 440°C

How much solder should be used for a typical joint?

• A thin line along the entire length of the pad

• A small bead, just enough to cover the connection

• Enough to completely submerge the component leads

• The more solder, the stronger the joint

What tool is used to remove unwanted solder from a joint?

• Tweezers

• Desoldering pump

• Wire cutters

• Sandpaper

What type of solder is best for lead-free applications?

• SAC (Sn-Ag-Cu) alloy

• 60/40 tin-lead

• Silver solder

• Leaded solder with low lead content

What does a "cold solder joint" look like?

• Dull and grayish

• Shiny and smooth

• Cracked and uneven

• Large and blob-shaped

After soldering, why is it important to inspect your joints visually?

• To check if the solder is shiny and bright

• To ensure there are no cracks, gaps, or excess solder

• To verify the components are properly aligned

• All of the above