Flux and Cleaning in Silver Soldering

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Which of the following is true about brazing?

Brazing can only join similar metals.

Brazing requires a melting point higher than 1800 °F.

Brazing requires less heat than welding. (correct)

Brazing is used for critical structural repairs on aircraft.

Which metals can be joined by brazing?

Aluminum and titanium.

Iron and Aluminum

Gold and Magnesium

Copper and steel. (correct)

What is the strongest type of brazed joint?

A joint with no flux.

A joint with a loose fit.

A joint with high heat.

A joint with a close fit. (correct)

Which type of joint is NOT recommended for silver soldering?

Butt joint Signup and view all the answers

What type of flame is recommended for silver soldering?

Neutral flame Signup and view all the answers

Which type of tungsten electrode is most suitable for DC operations on transformer-based TIG welding machines?

Thoriated electrode Signup and view all the answers

Which of the following is true about flux in brazing?

Flux helps remove oxidation from the metal surface Signup and view all the answers

What is the purpose of preheating the base metal in brazing?

To reach the flowing temperature of the filler metal Signup and view all the answers

Why is controlling the temperature of the base metal important in brazing?

To ensure the brazing filler flows properly Signup and view all the answers

Which alloys typically work with brazing products that have the flux contained in hollow spaces in the filler metal itself?

1100, 3003, and 6061 Signup and view all the answers

How is cleaning after brazing accomplished?

Using hot water and a clean stainless brush Signup and view all the answers

What is the most common general-purpose solder?

Half-and-half (50/50) Signup and view all the answers

Which of the following is NOT a recommended step in TIG welding 4130 steel tubing?

Weld where there is a breeze or draft Signup and view all the answers

What is the purpose of preheating and post-weld heat treatment in TIG welding 4130 steel tubing?

To avoid cracking Signup and view all the answers

Which filler metal alloy is suitable for welding austenitic type stainless steel?

AISI No. 309 Signup and view all the answers

Which type of gas is preferred for TIG welding aluminum?

Argon Signup and view all the answers

What is the purpose of back purging during the welding process?

To promote a sound weld with a smooth inner bead profile Signup and view all the answers

Which type of polarity is preferred for manual welding operations of magnesium?

DC reverse polarity Signup and view all the answers

What is the recommended distance between the tungsten tip and the surface of the material when TIG welding aluminum?

1/16 inch Signup and view all the answers

What are the recommended welding beads and welding speed for welding magnesium alloys?

Smaller welding beads, faster welding speed Signup and view all the answers