Brazing and Capillary Action Worksheet

Brazing is done at temperatures 840 degrees

• Below

• Above
• Equal to

• Negative

__________ is used in the filler metal which eliminates the need for __________

• Silver; Excessive heat

• Phosphorus; Flux

• Silver; Excessive Flux

• Flux; Phosphorus

The trick to creating a perfect braze is evenly heating the tubing and the connection to the correct temperature without

• Touching it

• Overheating
• Using flux

• Underheating

When heating the joint

• Start with the outer pipe first

• Heat both pipes at the same time

• Heat one pipe then the other

• Heat the inner pipe first

Capillary attraction is the fundamental principle for making sound joints

• True

• False

Capillary attraction draws the filler material into the small space in between the pieces.

• True

• False

__________ is how the filler material moves through the joint.

• Spilling

• Capillary-ing

• Slurping

• Wetting

Why is it important to thoroughly clean the tubing and connection pipe before brazing the joint?

• Dirt can make the unit look like it’s older than it really is.

• Wetting may not occur and the material will not bond properly

• Dirt particles can catch on fire making more dirt particles and more fire.

• It saves you from cleaning the pipes after the brazing is complete.

Improper heating ruins capillary action, therefore, it is important not to overheat the tubing

• True

• False

You’ve just finished brazing a joint, you notice that the filler material is piled up around the outside of the joint. What may you have done wrong?

• You overheated the joint

• You went too fast

• You didn’t get the filler material hot enough

• There is too much moisture in the air.