Study welding theory for your certification exam with these practice questions and answers. This guide covers welding processes, base metal metallurgy, joint design, welding symbols, and electrode selection.
Q: What are the three main categories of material joining processes?
Answer: 1. Mechanical fastening2. Adhesive bonding3. Welding
Q: Mechanical fastening
Answer: joins two materials together by using a clamping force*allows for materials to be disassembled if necessary
Q: Types of mechanical fasteners
Answer: screws, bolts, nails, and rivets
Q: Adhesive bonding
Answer: joins materials together using a nonmetallic material*especially useful when joining dissimilar materials
Q: Forms of different adhesives
Answer: gels, liquids, pastes, drops
Q: Welding
Answer: a joining process that produces coalescence of materials by heating them to the welding temperature, with or without the application of pressure or by the application of pressure alone, and with or without the use of filler metal.
Q: Coalescence
Answer: the melting together of filler metal and base metal (substrate), or of base metal only.
Q: Types of welding
Answer: 94 different typesProcesses covered in Intro to Welding:- Shielded Metal Arc Welding- Gas Tungsten Arc Welding- Gas Metal Arc Welding- Flux-Cored Arc Welding- Submerged Arc Welding
Q: Shielding
Answer: the puddle of liquid metal created while welding must be protected from air to keep it from oxidizing (becoming brittle)
Q: Shielding is accomplished through
Answer: the use of a flux contained on or inside the electrode, or by the use of an external shielding gas.
Q: Filler metals
Answer: typically added to increase the overall strength of the weld.
Q: Success in welding
Answer: – Skill of the person- Careful matching of filler metal to base metal- Meeting service requirements of part being welded