101k

Question 1

What are the grooves at the bottom of tube cutters for

Answer 1

Cutting flares

Question 2

A flaring tool and flare is always

Answer 2

45°

Question 3

When swedging what should you add

Answer 3

Oil

Question 4

Annealed copper is hard of soft?

Answer 4

Soft

Question 5

Pure acetylene is

Answer 5

High flammable
Colorless
Non pungent odor

Question 6

Another name for acetylene tank is

Answer 6

B tank

Question 7

When storing a cylinder always have the pressure at

Answer 7

0 psi

Question 8

Regulators on acetylene tanks reduce psi from

Answer 8

250 to 15psi

Question 9

Acetylene hoses are

Answer 9

Red

Question 10

Oxygen hoses are

Answer 10

Green

Question 11

Two types of copper

Answer 11

Hard drawn and soft drawn(annealed)

Question 12

What is cutting fluid used for

Answer 12

Keep tool and material cool
Reduce power consumption

Question 13

Two widths of copper

Answer 13

L and K

Question 14

What color is k tubing

Answer 14

Green paint

Question 15

What color is L tubing

Answer 15

Blue

Question 16

What type of tubing do we not use in refrigeration

Answer 16

M and it’s red

Question 17

A coupling fitting

Answer 17

Both sides are the same and go onto a smaller pipe

Question 18

ELL 90 fitting

Answer 18

Both sides are the same

Question 19

Street ELL 90 fitting

Answer 19

Both sides are different

Question 20

Redcuing coupling fitting is a

Answer 20

Bigger fitting to smaller (5/8- 3/8)

Question 21

Iron pipe is also called

Answer 21

Steel pipe

Question 22

Iron pipe is only used with

Answer 22

Ammonia

Question 23

Two types of iron pipe used in refrigeration

Answer 23

Standard schedule #40
Extra strong schedule #80

Question 24

Fitting allowance is

Answer 24

Throw of the fitting - thread engagement

Question 25

The short length of threading that goes into the fitting is called

Answer 25

Thread engagement

Question 26

Hard soldering is also known as

Answer 26

Silver soldering

Question 27

Hard soldering or silver soldering/brazing uses temperatures of over

Answer 27

800°F

Question 28

Soft soldering uses temperatures under

Answer 28

800°F

Question 29

95/5 solder composition

Answer 29

95% tin
5% antimony

Question 30

95/5 solder flow point °F

Answer 30

465°F

Question 31

95/5 solder can be used from copper to

Answer 31

Steel
Brass
Copper

Question 32

The space between the pipe and the fitting is called

Answer 32

Capillary gap

Question 33

Solder fills the gap between the pipe and fitting with

Answer 33

Capillary action

Question 34

Do not apply flux with hands what should you use

Answer 34

Brush

Question 35

If excessive amounts of flux is put on pipe what will happen

Answer 35

May cause excessive corrosion

Question 36

Overheating flux can cause

Answer 36

Solder to not flow properly into joint

Question 37

Allow joint to cool naturally, cooling it quick is called

Answer 37

Shock cooling

Question 38

Brazing filler metals melt at temperature between °F

Answer 38

1100°F-1500°F

Question 39

Silfos (silver alloy brazing 15) composition is

Answer 39

85% copper
15% silver
Use phosphorus flux

Question 40

Silver alloy wires composition is

Answer 40

45% silver with
Copper
Zinc
Cadmium
No flux

Question 41

Silver alloy wire is used to

Answer 41

Join ferrous and non ferrous metals that melt above 1500°

Question 42

Hottest point of the torch flame

Answer 42

Feather