Soldering and Brazing #16

A copper joint must never be soldered or brazed

• when nitrogen is present in the tubing

• when the system is opened to the atmosphere

• when the system is under pressure

• when air is present in the system

At what temperature does Stay Brite #8 solder melt?

• 360 °F

• 535 °F

• 635 °F

• 660 °F

At what Temperature soes 95-5 solder melt?

• 150°F

• 250°F

• 450°F

• 650°F

Using flux while soldering will help

• keep the joint that is being soldered clean

• retain heat on the joint that is being soldered

• stop oxides from forming

• absorb the solder into the joint

What are the common melting points of brazing material and silver solder?

• 500 to 800°F

• 1100 to 1480°F

• 2000 to 2500°F

• 2500 to 3000°F

Leaks in coils mae from aluminum are commonly repaired with

• silver solder

• silver brazing material

• brass brazing material

• epoxy

The term capillary action means to

• spray water on a joint after it has been soldered

• expand a joint as it is being heated by a torch

• draw solder into a joint as it is being heated

• add flux to the male part of a joint that is to be soldered

The gauges that are located on the oxyacetylene torch measure

• the tank pressure (in psig) and the regulated pressure (in psig) to the torch tip.

• the tank pressure in (psia) and the regulated pressure (in psia) to the torch tip

• the tank weight

  (in lb) and the regulated pressure (in psig) to the torch tip

• the volumetric pressure (in psig) and the regulated pressure (in psia) to the torch tip

The operating pressure of an acetylene regulator ranges from

• 0 to 15 psig

• 0 to 20 psig

• 0 to 40 psig

• 0 to 50 psig

The operating pressure of an oxygen regulator ranges from

• 0 to 20 psig

• 0 to 40 psig

• 0 to 50 psig

• 0 to 100 psig