Welding & Joining

Question 1

• Compare relative strengths and weaknesses among different types of welding.

Answer 1

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Question 2

• Compare relative strengths and weaknesses among welding, brazing/soldering, and mechanical fastening.

Answer 2

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Question 3

Describe the unique aspects of reflow soldering and wave soldering compared to brazing & soldering in general.

Answer 3

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Question 4

Distinguish the following types of fusion welding in terms of heat source and type of electrode (if applicable): oxyfuel gas, shielded metal arc (“stick”), gas metal arc (MIG), gas tunsten arc (TIG), and laser beam.

Answer 4

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Question 5

Explain the basic physical processes involved in the following common types of solid-state welding: ultrasonic, friction, resistance (e.g. spot, seam), and diffusion bonding.

Answer 5

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Question 6

Explain the distinctions and relative merits among welding, brazing, and soldering.

Answer 6

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Question 7

Explain the fundamental distinction between fusion welding and solid-state welding.

Answer 7

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Question 8

Explain the purpose of flux, shielding gas, and slag in fusion welding.

Answer 8

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Question 9

For brazing & soldering, explain the action of filler metal and solder, the roles of flux and wetting agents, and the importance of clearance control.

Answer 9

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Question 10

Interpret and explain common nomenclature for threaded fasteners (both US and metric).

Answer 10

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Question 11

Name different categories of common adhesives and identify their relative merits.

Answer 11

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