Deck 20: Soldering and Brazing

Question 1

Soldering and brazing are a weak way of joining or repairing parts.

Answer 1

False

Question 2

To prevent overheating with an oxyacetylene flame, keep the torch moving and hold the flame so that the inner cone is about ____ from the surface.

A) 0.25 in
B) 0.5 in
C) 0.75
D) 1 in

Answer 2

D

Question 3

Pennies manufactured before 1982 are solid ____.

A) nickel
B) copper
C) zinc
D) silver

Answer 3

B

Question 4

The concentrated flame of an oxyacetylene torch is not ideal for detailed work.

Question 5

Overheating can burn off the ____ coating found on many nuts and bolts. Such fumes can be hazardous, so you must avoid breathing these fumes during the brazing process.

A) tin
B) cadmium
C) copper
D) silver

Question 6

Both soldering and brazing can produce joints that are ____ the filler metal.

A) half as strong as
B) equally as strong as
C) twice as strong as
D) several times stronger than

Question 7

You cannot control the heat for soldering by decreasing the torch angle.

Question 8

The lower temperature used in ____ does not tend to create hard spots where the base metal becomes hardened.

A) welding
B) brazing
C) hard surfacing
D) soldering

Question 9

Brazing takes place at temperatures above ____ degrees F.

A) 640
B) 740
C) 840
D) 940

Question 10

The process of using heat to soften metal so it can be bent or formed has been used ____.

A) as long as mankind has worked with metals
B) since the 13th century
C) since the 16th century
D) since the Industrial Revolution

Question 11

With a(n) ____ joint, the area of the joint is greater than the thickness of the parts being joined.

A) lap
B) tee
C) butt
D) outside corner

Question 12

You can control the heat for both brazing and soldering by raising and lowering the torch flame.

Question 13

In severe cases of overheating, zinc in a brazing alloy may start to burn with a(n) ____ flame.

A) orangish
B) whitish
C) orangish-whitish
D) reddish

Question 14

____ does not need capillary action to pull filler metal into the joint.

A) Brazing
B) Soldering
C) Braze welding
D) Hard surfacing

Question 15

Always securely clamp metal being drilled because if the drill bit grabs the metal, it will spin around the bit.

Question 16

Bending with heat produces as accurate a bend as if it were bent in a jig.

Question 17

Pretinning parts is an excellent way of assembling small parts when you are working by yourself.

Question 18

When brazing beads, some of the signs that the braze metal is being overheated include the bead spreading out over the metal surface, the flux turning black, and/or a white powdery zinc oxide forming alongside of the braze bead.

Question 19

It is not recommended to drill a small pilot hole before trying to drill a larger diameter hole in metal.

Question 20

The application of a surface layer of braze material can be used to add a decorative and durable surface to mild steel.

Question 21

All metal drill bits have a small flat spot on the tip called the ____________________ .

Question 22

____________________ is the force that pulls water up into a paper towel or pulls a liquid into a very fine straw.

Question 23

____________________ takes place at temperatures below 840 degrees F.

Question 24

____________________ is the process of putting a small amount of braze metal on the parts before assembly and then remelting the braze metal to fuse the parts together.

Question 25

If galvanized metal is being soldered or if tin-lead solder is being used, additional ventilation should be provided to prevent ____________________ poisoning.