Chapter 23

Question 1

Select all that are true of flux.

Forms a protective coating over the heated metal surfaces that prevents oxidation

Removes all oxides from the metal surfaces

Usually a borax type consisting of sodium borate with other additives

Required for bronze or brass brazing

Any substance or mixture used to promote the fusion of metals or minerals

Floats the oxides and their impurities with which it combines to the top of the molten metal

All of the above

Answer 1

All of the above

Question 2

Brazing is the _____, rather than _____, of two metal objects.

a.
melting, welding

b.
fusing, bonding

c.
bonding, fusing

Answer 2

c.
bonding, fusing

Question 3

What is the step in brazing called when you apply a light, uniform coating of fluxed filler rod?

Adhering

Rodding

Flux-coating

Tinning

Answer 3

Tinning

Question 4

True or False

Brazing can not be used to join dissimilar metals.

Answer 4

False

Question 5

True or False

Filler rods for brass must either have a flux coating or be heated and dipped in flux.

Answer 5

True

Question 6

Brazing uses oxyacetylene welding equipment and _________ filler rods.

flux-coated brass

gold

Answer 6

flux-coated brass

Question 7

A ______ is the safest thing to use to light a torch for brazing.

striker

torch

match

Answer 7

striker

Question 8

When brazing, the oxygen cylinder should be opened ________________ .

one full turn

a quarter turn

all the way

two full turns

Answer 8

all the way

Question 9

Did the brazed weld in the video break after put to the test?

No

Yes

Answer 9

No

Question 10

When brazing, the acetylene cylinder should be opened a ______ turn.

1/4

1/2

Answer 10

1/4