fab 1100\n41. in smaw welding, which welding position is represented by a 4?\na) flat position\nb)…

fab 1100\n41. in smaw welding, which welding position is represented by a 4?\na) flat position\nb) horizontal position\nc) vertical position\nd) overhead position\n42. in smaw welding, what is the primary cause of \burn - through\?\na) insufficient amperage\nb) incorrect electrode angle\nc) excessive heat input\nd) lack of flux\n43. which of the following is not a typical application of smaw welding?\na) automotive body repair\nb) shipbuilding\nc) jewelry making\nd) construction\n44. in smaw welding, what is the purpose of \backing bars\?\na) to support the work piece during welding\nb) to provide electrical insulation\nc) to protect the welding machine from overheating\nd) to shape the weld bead\n45. in smaw welding, what is \tack welding\?\na) a welding process using a torch\nb) a type of welding electrode\nc) temporary welds used to hold parts in position before final welding\nd) a type of welding position\n46. which of the following is a common application of smaw welding in the construction industry?\na) welding jewelry\nb) welding pipes for water supply\nc) welding surgical instruments\nd) welding structural steel components

fab 1100\n41. in smaw welding, which welding position is represented by a 4?\na) flat position\nb) horizontal position\nc) vertical position\nd) overhead position\n42. in smaw welding, what is the primary cause of \burn - through\?\na) insufficient amperage\nb) incorrect electrode angle\nc) excessive heat input\nd) lack of flux\n43. which of the following is not a typical application of smaw welding?\na) automotive body repair\nb) shipbuilding\nc) jewelry making\nd) construction\n44. in smaw welding, what is the purpose of \backing bars\?\na) to support the work piece during welding\nb) to provide electrical insulation\nc) to protect the welding machine from overheating\nd) to shape the weld bead\n45. in smaw welding, what is \tack welding\?\na) a welding process using a torch\nb) a type of welding electrode\nc) temporary welds used to hold parts in position before final welding\nd) a type of welding position\n46. which of the following is a common application of smaw welding in the construction industry?\na) welding jewelry\nb) welding pipes for water supply\nc) welding surgical instruments\nd) welding structural steel components

Answer

Brief Explanations:

  • Question 41: In SMAW (Shielded Metal Arc Welding), the numbering system for welding positions: 1 - flat, 2 - horizontal, 3 - vertical, 4 - overhead.
  • Question 42: Burn - through occurs when too much heat is input, melting the base metal excessively. Insufficient amperage would lead to lack of fusion, incorrect electrode angle to poor bead shape or lack of fusion in some cases, and lack of flux (in SMAW, electrodes have flux coatings) is not the primary cause of burn - through.
  • Question 43: SMAW is commonly used in automotive body repair (for thicker metal parts), shipbuilding (heavy - duty welding), and construction (structural welding). Jewelry making usually requires more precise and often different welding techniques (like micro - welding), not SMAW which is more suited for heavier materials.
  • Question 44: Backing bars are used to shape the weld bead, especially on the root pass, to ensure proper fusion and a good - looking weld bead. They are not for supporting the workpiece (fixtures are for that), providing electrical insulation (not their function), or protecting the machine from overheating.
  • Question 45: Tack welding is the use of temporary welds to hold parts in position before final welding. It is not a process using a torch (that might be gas welding in some cases), not a type of electrode, and not a welding position.
  • Question 46: In the construction industry, welding structural steel components is a common application of SMAW. Welding jewelry is not typical (as mentioned before), welding pipes for water supply might use other methods (like TIG for some clean - water applications), and welding surgical instruments is a highly specialized (usually more precise and clean - room) process not typically SMAW.

Answer:

  1. d) Overhead position
  2. c) Excessive heat input
  3. c) Jewelry making
  4. d) To shape the weld bead
  5. c) Temporary welds used to hold parts in position before final welding
  6. d) Welding structural steel components