Soldering ILM

Question 1

What are soft solders?

Answer 1

They are alloys made of mostly tin and lead

Question 2

The percentages in which the tin and lead are mixed vary to ensure what?

Answer 2

That a solder with a lower melting point that the base metal can always be found

Question 3

What was the solder called when using 50% Tin and 50% lead?

Answer 3

Half and half

Question 4

What’s the function of soldering flux

Answer 4

To remove the oxide film from the metals surfaces

Question 5

Muriatic acid is what?

Answer 5

The commercial form of hydrochloric acid

Question 6

Zinc chloride is known in the trade as what?

Answer 6

Cut, killed, or boiled acid

Question 7

Stainless steel flux commonly used is what?

Answer 7

Lloyds flux

Question 8

What is a natural product found in the tar of pine trees?

Answer 8

Rosin

Question 9

Sal-ammoniac contains what? How can it be obtained?

Answer 9

Ammonium chloride and can be obtained in blocks or powder form

Question 10

The process of ______ soldering is much like sweat soldering, but with an increased rate of travel

Answer 10

Skim soldering

Question 11

What do you do when soldering overhead?

Answer 11

You Tin only one side of the copper

Question 12

The fumes from soldering are?

Answer 12

Toxic

Question 13

What’s the most common heat source for soldering ?

Answer 13

A soldering furnace

Question 14

How is soldering coppers sized?

Answer 14

Weight per pair of coppers

Question 15

What copper is used for long heavy seams?

Answer 15

Hatchet copper

Question 16

How do you achieve the best results when soldering?

Answer 16

Proper forging, filling, and tinning of the head of copper

Question 17

What must be done to new soldering coppers before use?

Answer 17

They must be tinned

Question 18

When must A copper must be re-tinned

Answer 18

If it’s been overheated

Question 19

On a lap seam, you must ensure what?

Answer 19

All the oxides have been removed with the proper flux

Question 20

Where should you start when tacking?

Answer 20

The center of the seam and work outward

Question 21

What makes it hard to solder ?

Answer 21

The rapid formation of and aluminum oxide layer

Question 22

The dipping solution is made by what?

Answer 22

Dissolving powdered Sal-ammoniac in water

Question 23

Explain the difference between hard soldering and soft soldering

Answer 23

Hard requires a higher temp

Question 24

What file do you use for filing copper heads

Answer 24

A single cut bastard or vixen files

Question 25

What is Sal-ammoniac acid used for?

Answer 25

To tin coppers and make dipping solution for cleaning copepr