Most solder comes on a what?

• A. A cartridge
• B. A spool
• C. A bar
• D. A coil

Answer: (B)

Solder wire is typically sold wound on a spool. This packaging makes it easy to pull off just the right length as you work and keeps the wire from tangling while you feed it to the soldering iron. Other forms exist for different uses (bars/ingots for bulk material, paste cartridges for SMT work), but for standard hand soldering, the familiar form is on a spool. That’s why the best answer is a spool.