Soldering

Why is it important to clean the copper pipe before soldering?

• To ensure the solder flows smoothly

• To prevent the pipe from overheating

• To make the pipe look shiny

• To remove any oils, dirt, and oxidation

How do you know when the copper pipe is hot enough to apply solder?

• The flux starts to boil

• The pipe turns red

• The solder melts on contact with the pipe

• The pipe makes a hissing sound

How long should you apply heat to a copper pipe joint during soldering?

• Until the pipe turns blue

• For at least 5 minutes

• Until the solder flows freely around the joint

• For 30 seconds, regardless of the joint size

Which type of solder is used for potable water lines?

• Lead-solder (50/50)

• Lead-free solder (95/5)

• Lead-free solder (50/50)

• Lead-solder (95/5)

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

• To allow the solder to flow upwards due to capillary action

• To heat the top of the joint faster

• To prevent the solder from flowing down due to gravity

• To avoid overheating the joint

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

• To cool down the joint

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

• To remove excess solder

• To create a smoother surface on the joint

What is used to clean the pipe before soldering?

• Sandpaper

• Emery cloth

• All of the above

• Wire brush

What is the recommended filler material for soldering copper drains?

• Lead-free solder (95/5)

• Lead-solder (95/5)

• Lead-free solder (50/50)

• Lead-solder (50/50)

What is the effect of not cleaning the pipe properly before soldering?

• 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

• All of the above

Before applying flux, what must be done to the copper pipe?

• Heat it with a propane torch

• Clean and deburr the pipe

• Coat it with a thin layer of solder

• Nothing, it's ready to use