Deck 19: Soldering, Brazing, and Braze Welding Processes

Question 1

The ____ of a brazed joint is its ability to withstand a force parallel to the joint.

A) shear strength
B) tensile strength
C) corrosion resistance
D) ductility

Answer 1

A

Question 2

The ____ method of heating uses a high-frequency electrical current to establish a corresponding current on the surface of the part.

A) resistance
B) induction
C) torch furnace
D) ultrasonic

Answer 2

B

Question 3

The use of fluxes eliminates the need for good joint cleaning.

Answer 3

False

Question 4

____ solder alloys have excellent wetting, flow, and strength characteristics, but they are expensive.

A) Tin-lead
B) Cadmium-zinc
C) Cadmium-silver
D) Tin-antimony

Question 5

Brazing uses more filler metal than braze welding.

Question 6

One function of fluxes is to remove any oxides that form as a result of heating the parts.

Question 7

____ of a joint is its ability to resist chemical attack.

A) Tensile strength
B) Shear strength
C) Fatigue resistance
D) Corrosion resistance

Question 8

The only difference between soldering and brazing is that brazing is done at a lower temperature, below 840 degrees F (449 degrees C), and soldering is done at a higher temperature, above 840 degrees F (449 degrees C).

Question 9

The flame of the torch is one of the quickest ways of heating the material to be joined, especially on thicker sections.

Question 10

____ solders are most commonly used on electrical connections, air-conditioning and refrigeration drain piping, and for architectural accents where good corrosion resistance is needed. They must never be used for water piping.

A) Tin-antimony-lead
B) Cadmium-silver
C) Tin-lead
D) Tin-antimony

Question 11

The ____ of a metal is its ability to be bent repeatedly without exceeding its elastic limit and without failure.

A) shear strength
B) tensile strength
C) corrosion resistance
D) fatigue resistance

Question 12

Braze welding uses capillary action to pull filler metal into a tightly fitted joint.

Question 13

The oxyacetylene flame has a very high temperature near the inner cone, but it has little heat in the outer flame.

Question 14

When silver soldering on food-handling equipment, use a cadmium-free silver solder.

Question 15

If fluxes become overheated or burned, they will stop working as fluxes, and become a contamination in the joint.

Question 16

The ____ of a joint is its ability to withstand being pulled apart.

A) ductility
B) tensile strength
C) corrosion resistance
D) shear strength

Question 17

____ alloys are the most popular brazing alloys.They are available as regular and low-fuming alloys.

A) Copper-phosphorus
B) Copper-zinc
C) Nickel
D) Silver-copper

Question 18

____ of a joint is its ability to bend without failing.

A) Tensile strength
B) Ductility
C) Shear strength
D) Corrosion resistance

Question 19

The ____ method of heating uses an electric current that is passed through the part.

A) resistance
B) ultrasonic
C) induction
D) torch furnace

Question 20

Using excessive flux in a joint may result in flux being trapped in the joint, weakening the joint, or causing the joint to leak or fail.

Question 21

Because soldering and brazing are similar processes, both are classified by the American Welding Society (AWS) as ____________________.

Question 22

With the ____________________ method, the prefluxed parts are immersed in a bath of molten solder or braze metal, which is protected by a cover of molten flux.

Question 23

With the ____________________ method, the soldering or brazing filler metal in a suitable form is preplaced in the joint, and the assembly is immersed in a bath of molten flux.

Question 24

The ____________________ method uses high-frequency sound waves to produce the bond or to aid with heat in the bonding.

Question 25

A(n) ____________________ is the temperature range in which a metal is partly solid and partly liquid as it is heated or cooled.