Soldering Copper Piping and Tubing Flashcard

Front

What is the primary purpose of flux in soldering copper pipes?

Back

To prevent oxidation of the base and filler material

Front

Which type of solder is used for potable water lines?

Back

Lead-free solder (95/5)

Front

What is the scientific term for the ability of a liquid to flow in narrow spaces without the assistance of external forces?

Back

Capillary action

Front

Why is it important to start heating the joint at the bottom first during soldering?

Back

To prevent the solder from flowing down due to gravity

Front

What should be done if the joint is not correctly heated during soldering?

Back

Reapply a bit of flux, heat up the joint, and solder the affected area.

Front

What is the purpose of wiping off excess flux after soldering?

Back

To prevent the flux from eating up the pipe in the long run

Front

Which type of fuel burns hotter than propane for soldering copper pipes?

Back

MAPP gas

Front

What is used to clean the pipe before soldering? Options: Sandpaper, Emery cloth, Wire brush

Back

All of the above

Front

What is the recommended filler material for soldering copper drains?

Back

Lead-solder (50/50)

Front

What is the effect of using a torch that is too hot when soldering?

Back

The solder will not adhere properly to the joint, The joint will overheat and become damaged, The solder will melt too quickly and flow out of the joint.