TEST 8- SOLDERING AND BRAZING QUESTIONS AND
ANSWERS
/. What is the maximum temperature that liquids can be when soldering joints? -
Answer-250 Degrees
/.The solder most commonly used on low-pressure copper fittings is made from -
Answer-95% tin/5% antimony
/.What Number steel wool should be used to clean copper piping? - Answer-Np. 00
/.How to properly feed soldering into a horizontal application? - Answer-Start feeding
solder near the bottom and work up
/.Grease and oil must be kept away from oxygen tanks used for brazing because of
what hazard? - Answer-The mixture could result in an explosion.
/.Which of these actions is taken to prevent over-pressurizing the torch hoses during
equipment setup? - Answer-Turning the regulator adjusting screw counterclockwise
(out).
/.Where to apply brazing flux? - Answer-Only on the tube end.
/.Carburizing flame - Answer-A flame burning with an excess amount of fuel; also called
a reducing flame.
When brazing very small joints or thin metal, the type of flame used in order to prevent
the base metal from
melting.
/.When brazing larger joints how should you organize the work? - Answer-Organize the
large joint into smaller, more manageable sections.
/.When copper is being brazed to steel, what filler material is used? - Answer-A filler
metal with a high silver content is used
/.
ANSWERS
/. What is the maximum temperature that liquids can be when soldering joints? -
Answer-250 Degrees
/.The solder most commonly used on low-pressure copper fittings is made from -
Answer-95% tin/5% antimony
/.What Number steel wool should be used to clean copper piping? - Answer-Np. 00
/.How to properly feed soldering into a horizontal application? - Answer-Start feeding
solder near the bottom and work up
/.Grease and oil must be kept away from oxygen tanks used for brazing because of
what hazard? - Answer-The mixture could result in an explosion.
/.Which of these actions is taken to prevent over-pressurizing the torch hoses during
equipment setup? - Answer-Turning the regulator adjusting screw counterclockwise
(out).
/.Where to apply brazing flux? - Answer-Only on the tube end.
/.Carburizing flame - Answer-A flame burning with an excess amount of fuel; also called
a reducing flame.
When brazing very small joints or thin metal, the type of flame used in order to prevent
the base metal from
melting.
/.When brazing larger joints how should you organize the work? - Answer-Organize the
large joint into smaller, more manageable sections.
/.When copper is being brazed to steel, what filler material is used? - Answer-A filler
metal with a high silver content is used
/.
