SOLDERING AND BRAZING

Question 1

2 process in joining metals/alloys

Answer 1

soldering amd brazing

Question 2

Joining of metals below 425 degrees Celsius

Answer 2

Soldering

Question 3

Joining of metals above 425 degrees celsius

Answer 3

Brazing

Question 4

2 Dental Solders

Answer 4

Gold based alloy solders and Silver based alloy solders

Question 5

Used to solder CAST alloys

Answer 5

Gold based alloy solders

Question 6

Used more in orthodiontic applications and have more strength than gold

Answer 6

Silver based alloy solders

Question 7

Cleans the alloy to be soldered and dissolves surface oxide

Answer 7

Flux

Question 8

Used Borax-containing flux and has good tarning and corrosion resistance

Answer 8

Gold based alloy solders

Question 9

Used for crown and bridge application

Answer 9

Gold based alloy solders

Question 10

Uses potassium-fluoride containing flux

Answer 10

Stainless steel and base metal solders

Question 11

Give atleast 2 compositions of gold base alloy solders

Answer 11

Gold and Silver

Question 12

What are the 4 different properties of soldering?

Answer 12

• Its liquidus should be below the solidus of the alloy to be soldered
• flow and wetting
• corrosion
• Melting range

Question 13

It is the process of heating closely packed particles below their melting temperature to promote atomic diffusion:

Answer 13

sintering

Question 14

The following are the materials used for gold based alloy solders except:

a. Gold
b. Silver
c. Copper
d. Zinc

Answer 14

d. Zincavolity