Common Soldering Mistakes for Apprentice Plumbers

What tool is recommended for cleaning the inside of a fitting?

• A wire brush

• A fitting brush

• Sandpaper

• A Scotch-Brite pad

What can be used to clean the outside of the pipe?

• Oil

• Water

• Abrasive cloth or a Scotch-Brite pad

• A fitting brush

What is the primary purpose of cleaning the fittings and pipes before soldering?

• To make them look aesthetically pleasing

• To remove any potential contaminants that could weaken the joint

• To ensure they fit together perfectly

• To prepare them for painting

Why is it important to keep the flux container closed when not in use?

• To maintain its color

• To avoid contamination that could cause leaks

• To prevent it from drying out

• To keep it from evaporating

What is the main reason for applying flux on the fittings and pipes?

• To clean the surface

• To cool down the metal

• To ensure a strong bond between the solder and the metal

• To prevent rust

What should you do if you apply too much flux?

• Add more solder

• Wipe off the excess

• Heat it immediately

• Leave it as it is

What is the purpose of moving the heat around the joint when soldering?

• To cool down the joint faster

• To prevent the solder from melting

• To make the soldering process faster

• To ensure even distribution of heat

What is the rule of thumb for the amount of solder needed for a 3/4 inch joint?

• 1 inch of solder

• 1/2 inch of solder

• 3/4 of an inch of solder

• 1/4 inch of solder

What is the consequence of applying too much heat when soldering?

• The solder will not melt

• The joint will be too weak

• The flux may burn out, resulting in a poor joint

• The pipe will bend

Why is it important not to turn the water on too soon after soldering?

• To save water

• To ensure the solder fully solidifies

• To avoid water pressure testing the joint prematurely

• To prevent the joint from cooling too quickly